716-01 Thru 716 -02 (Vacant)
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 SECTION 716 - BEARINGS AND EXPANSION PLATES (Last Revised May, 2016 )
716-01 Thru 716 -02 (Vacant)
716-03 Polyether Urethane Structural Element
SCOPE. This specification covers the material requirements for Polyether Urethane Structural Element . GENERAL. The polyether urethane structural element used in the construction of disc -design bearings shall be molded from a polyether urethane compound. MATERIAL REQUIREMENTS. The physical propert ies of the polyether urethane shall conform to the requirements of Table 716 -03-1. TABLE 716 -03-1 PHYSICAL REQUIREMENTS OF POLYETHER URETHANE STRUCTURAL ELEMENT Physical Property ASTM Test Method Requirements Min. Max. Hardness, Type D Durometer D2240 57 67 Tensile Stress, psi1 At 100% elongation At 300% elongation³ D412 ------ Tensile Strength, psi1 D412 5000 --- Ultimate Elongation, %1 D412 220 --- Compression Set1,2, % D395 --- 40 NOTES: 1. 10% deviation from specified values is permissible.
2.22 hours at 158°F
3.Only required if 300% is attained SAMPLING AND TESTING. TABLE 716 -03-2 POLYETHER URETHANE SAMPLING AND TESTING REQUIREMENTS Test Performed By Samples Required Physical Properties Polyether Urethane Rotational Element (except compression set) Materials Bureau One 10 x 15 inch sheet of polyether urethane material (thickness of 1/16 - 1/8 inch) per lot.1 Compression Set of Polyether Urethane Rotation Element Materials Bure au One 4 x 4 inch sheet of polyether urethane material, molded or cut to the thickness requirements of ASTM D395, Method B.2 NOTES:
1.All submitted sample sheets of polyether urethane material shall be certified by the bearing manufacturer as having been taken from the same batch of polyether urethane material as was used in the actual production bearings.
2.The manufacturer shall have the option of supplying four (4) die cut specimens in accordance with ASTM D395, Method B. All submitted specimens of polyether urethane material shall be certified by the bearing manufacturer as having been taken from the same batch of polyether urethane material as was used in the actual production bearings. BASIS OF ACCEPTANCE. Polyether Urethane Structu ral Element will be considered for acceptance in lot quantities in accordance with the procedural directives of the Materials Bureau.
716-04 Polytetrafluoroethylene Sheet and Strip
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 716-04 POLYTETRAFLUOROETHYLENE SHEET AND STRIP SCOPE. This specification covers the material requirements for Polytetrafluoroethylene (PTFE) sheet and strip. GENERAL. Polytetrafluoroethylene (PTFE) sheet and strip shall be manufactured from pure virgin (not processed) unfilled TFE resin; or from TFE resin uniformly blended with either 15% glass fiber or 25% carbon (maximum filler, percent by weight). MATERIAL REQUIREMENTS. Finished PTFE sheet and strip shall be resistant to all acids, alkalis and petroleum products, stable at temperatures from -360°F to +500°F, non -flammable, non -absorbing of water, and shall conform to the physical requirements of Table 716 -04-1. TABLE 716 -04-1 PHYSICAL REQUIREMENTS OF PTFE SHEET AND STRIP Physical Property ASTM Test Method MINIMUM REQUIREMENTS Unfilled Filled 15% Glass Filled 25% Carbon Ultimate Tensile Strength, psi Ultimate Elongation, % Specific Gravity D638M D638M D792 2800 2.13 2000 2.18 1300 2.05 SAMPLING AND TESTING. One 10 x 15 inch sheet of PTFE material per lot as per 716-07. Single sheets of PTFE Material from which the bearing has been fabricated may be submitted to the Materials Bureau for consideration of multiple lot acceptance, provided that the thickness of the material does not vary from lot to lot. All submitte d sample sheets shall be certified by the bearing manufacturer as having been taken from the same batch of PTFE material as was used in the actual production of bearings. BASIS OF ACCEPTANCE. Polytetrafluoroethylene (PTFE) sheet and strip will be conside red for acceptance in lot quantities in accordance with the procedural directives of the Materials Bureau.
716-05 Self -Lubricating Bronze Plates
SCOPE. This specification covers requirements for self -lubricating bronze plates used as bearing plates in expansion bearings. MATERIAL REQUIREMENTS. Self-lubricating bronze shall conform to the requirements of ASTM B22, Alloy 911. The lubricant shall be of t he solid type and shall consist of graphite, metallic substances having lubricating properties and a lubricating binder. Materials which do not have lubricating qualities or promote chemical or electrolytic reactions, shall not be acceptable. The lubrica nt shall be integrally molded and compressed into the lubrication recesses with hydraulic pressure of at least five times the maximum design unit loading to from a dense, non -plastic lubricant which shall project above the surface of the bronze a minimum o f 0.005 inch. The recesses for the lubricant shall consist of annular rings with or without central circular recess with a depth at least equal to the width of the ring or diameter of hole for proper containment of lubricant. The recesses shall be arranged in a geometrical pattern such that successive rows shall overlap in the direction of motion and the distance between extremities of recesses shall be closer in the direction of motion than that perpendicular to motion. The entire bearing area of all surf aces which have provision for motion shall be lubricated by means of these lubricant filled recesses. The total area of these recesses shall comprise not less than 25 percent nor more than 35 percent of the total bearing area of the plate.
716-06 Disc -Design Structural Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 The bearing pla tes shall be furnished to the sizes and shapes specified on the plans. The maximum permissible variation in the specified thickness of bronze plates shall be ± 0.01 inch . The lay of the tool marks shall be in the direction of motion or shall be omnidirec tional. On flat faces the machined surface shall be flat to a tolerance of 0.0005 inches in each inch of length and width. On curved faces the radius of the machined surface shall have the following tolerances: Positive tolerance Negative tolerance Concave Surface 0.010 inch Zero Convex Surface Zero 0.010 inch The curved surface shall be machined to a tolerance of 0.0005 inches in each inch of length perpendicular to the circular section. Surfaces of bronze plates in contact wi th machined surfaces of steel plates shall be machine finished in accordance with the requirements of the SCM, Section 6, Part 612 (When the SCM requires DCES approval, delete the term “DCES ” and replace it with “the Regional Director. ”). Machining shall be of the same surface roughness as that required for sliding bearings. The coefficient of friction between the self -lubricating bronze plates and the steel plates in contact with them shall not exceed 0.10 when subjected to the maximum designed unit loadi ng and also at twice the maximum design unit loading. BASIS OF ACCEPTANCE. The manufacturer shall supply the Engineer with certification that the bronze plate was manufactured in accordance with this specification. This certification must be received by the Engineer prior to the placement of the bronze plate or any fabricated piece containing the bronze plate into any construction work.
716-06 Disc -Design Structural Bridge Bearings
SCOPE. This specification covers the material requirements for disc-design structural bridge bearings. Bearings furnished under this specification shall adequately provide for the thermal expansion and contraction, rotation, camber changes, and creep and shrinkage of structural members, where applicable. GENERAL. Disc-design structural bridge bearings shall consist of a polyether urethane structural element (disc) confined by upper and lower steel bearing plates. The bearings shall be equipped with a shear restriction mechanism to prevent movement of the disc. Disc-design structural bridge bearings shall be supplied as fixed bearings; guided expansion bearings; and non -guided expansion bearings as designated by the Contract Documents.
A.Fixed Bearings . Fixed bearings shall allow rotation but no longitudinal or transverse movement in the bearing plane.
B.Guided Expansion Bearings. Guided expansion bearings shall allow rotation and longitudinal movement in the bearing plane; transverse movement shall be restricted. To allow longitudinal movement, the upper steel bearing plate shall be faced with polytetrafluoroethylene (PTFE) sheet and support a sliding steel top bearing plate. The mating surface of the sliding steel top bearing plate shall be faced with polished stainless steel. To restrict trans verse movement, either a guide bar or keyway system shall be used. If required, the guide bar or keyway systems and their mating steel surfaces shall be faced with strips of either PTFE or PTFE -stainless steel.
C.Non-Guided Expansion Bearings. Non-guided expansion bearings shall allow rotation, longitudinal, and transverse movement in the bearing plane. To allow longitudinal and transverse
716-06 Disc -Design Structural Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 movement, the upper steel bearing plate shall be faced with polytetrafluoroethylene (PTFE) sheet and suppor t a sliding steel top bearing plate. The mating surface of the sliding steel top bearing plate shall be faced with polished stainless steel. MATERIAL REQUIREMENTS. All material shall be new and unused, with no used material incorporated in the finished be aring.
A.Polyether Urethane Structural Element. The polyether urethane structural element shall meet the requirements of 716 -03.
B.Steel. All steel, except stainless steel components, of the bearing shall conform to the requirements of the type of stee l designated on the Contract Plans and applicable provisions of the New York State Steel Construction Manual.
C.Stainless Steel. Stainless steel shall conform to the requirements of ASTM A167, or ASTM A240, Type 304. Stainless steel in contact with PTFE shall be polished to a No. 8, bright mirror finish. The minimum thickness of the stainless steel shall be 0.05 inches.
D.Polytetrafluoroethylene Sheet and Strip. Polytetrafluoroethylene (PTFE) sheet and strip shall meet the requirements of 716 -04. FABRIC ATION. The finish of the mold used to produce the bearing elements shall conform to good machine shop practice. Every bearing shall have the Project Identification Number, NYSDOT Lot Number and individual bearing number indelibly marked with ink on a side that will be visible after erection. The PTFE sheet shall be bonded to its grit blasted steel substrate using an epoxy resin adhesive under controlled factory conditions in accordance with the instructions of the adhesive manufacturer. Alternately, the PTFE sheet may be recessed into its steel substrate for one -half its thickness. The bearing manufacturer shall have the option of bonding recessed PTFE sheet. All steel surfaces exposed to the atmosphere, except stainless steel surfaces an d metal surfaces to be welded or metalized , shall be cleaned to meet SSPC -SP10, “Near -White Metal Blast Cleaning” and painted in accordance with section 572, Structural Paint System: Shop Applied. The paint shall be selected from the Department’s Approved List, Structural Steel Paints – Class 1. For bearings used in conjunction with unpainted steel, the color of the finish coat shall Weathered Brown as defined by 708 - 05. Except as noted, all bearing surfaces of steel plates shall be finished or machined flat within 0.0008 inch/inch. Out -of-flatness exceeding the greater of 0.01 inch or 0.0008 inch/inch on any plate shall be cause for rejection. The bottom surfaces of lower bearing plates (masonry plates) designed to rest on bearing pads shall not exceed an out -of-flatness value of 0.005 inch/inch. Oxygen cut surfaces shall not exceed a surface roughness value of 1 mil, as defined by ASME B46.1. Repair, when necessary, shall conform to the requirements of the New York State Steel Con struction Manual (When the SCM requires DCES approval, delete the term DCES" and replace it with "the Regional Director). Unless otherwise approved by the Regional Director, all welding shall conform to, and all welders shall be qualified in accordance wit h the requirements of, the New York State Construction Manual (When the SCM requires DCES approval, delete the term ‘DCES’ and replace it with ‘Regional Director’). Gross bearing dimensions shall have a tolerance of -0, +1/8 inch. PERFORMANCE CHARACTERIST ICS
716-06 Disc -Design Structur Al Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 A. Proof Load. Load the bearing to 150% of the bearing’s design capacity and simultaneously subject it to a rotational range of 0.02 radians for a period of 30 minutes. Remove the load over a period of 30 to 90 seconds, then reapply the load for 30 mo re minutes. The test result will be evaluated as follows:
1.The bearing will be visually examined both during and after the test. Any resultant visual defects shall be cause for rejection.
2.Continuous and uniform contact shall be maintained between all adjacent elements of the disc - design structural bridge bearing for the duration of the test. Any observed lift -off shall be cause for rejection.
B.Sliding Coefficient of Friction. For all guided and non -guided expansion disc -design structura l bearings, the coefficients of friction shall be measured at the bearing's design capacity, on the fifth and fiftieth cycles, at a sliding speed of 1 inch per minute. The sliding coefficient of friction shall be calculated as the horizontal load required to maintain continuous sliding of one bearing, divided by the bearing's design capacity vertical load. The vertical load shall have been applied continuously for a minimum of 12 hours prior to testing. The test results will be evaluated as follows:
1.The measured sliding coefficients of friction shall not exceed 75% of the maximum design coefficient of friction.
2.The bearing will be visually examined both during and after the test. Any resultant visual defects (such as bond failure, physical destruction, cold flow of PTFE, or damaged components) shall be cause for rejection. DRAWINGS. The Contractor shall submit detailed shop drawings, drawn by the Manufacturer only, in conformance with the applicable requirements of the New York State Steel Construction Manual, for approval by the Regional Director prior to the start of fabrication. In addition to the above requirements, the Manufacturer shall note the following on the shop drawings:
A.The Manufacturer's name and the name of the manufacturer's representative who will be responsible for coordinating production, inspection, sampling, and testing with the Materials Bureau.
B.The location of the fabrication plant.
C.The type(s) of steel to be used.
D.If applicable, any welding p rocess used in the bearing manufacture that does not conform to the approved processes of New York State Steel Construction Manual shall be clearly described and detailed.
E.The total quantity of each kind of disc -design structural bridge bearing require d, i.e., fixed, guided expansion, or non -guided expansion, grouped first according to type (load range) and then by actual design capacity.
F.The thickness and plan area of the polyether urethane structural elements required.
G.The maximum design coeff icient of friction as noted on the Contract Plans.
716-06 Disc -Design Structural Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 H. The type of PTFE sheet (filled or unfilled) and, if applicable, the type and amount (by weight) of filler. The Contractor shall also provide the Materials Bureau with written notification thirty (30) days prior to the start of bearing fabrication. This notification shall include all of the information required as identified above. A copy of this notification shall be sent to the Regional Director. SAMPLING AND TESTING. The manufacturer shall perform tests in the presence of the Department’s representative and shall furnish the required number of samples to the Department to perform testing in accordance with Table 716 -06.
A.Lot Size. Sampling, testing and acceptance consideration will be made on a lot basis. A lot shall be defined as those bearings presented for inspection at a specific time or date. A lot shall be further defined as the smallest number of bearings as determined by the following criteria:
1.A lot sh all not exceed a single contract or project quantity.
2.A lot shall not exceed 25 bearings.
3.A lot shall consist of those bearings that can be manufactured with polyether urethane structural elements from one batch of polyether urethane material. The mass of one batch shall not exceed 450 lbs.
4.A lot shall consist of those bearings of the same type, regardless of load capacity. Bearing types shall be fixed type bearings or expansion type bearings. Guided and non -guided expansion bearings will be con sidered as a single type.
B.Schedule. The manufacturer shall inform the Department when the bearings and component materials are ready for sampling and inspection. A minimum of thirty (30) days shall be allowed for the Department's inspection, sampling, and testing of component materials. A minimum of fourteen
14.days of notice shall be given to the Department for testing which will require a Department representative to witness.
C.Sampling Method. The Department’s representative shall select, at random, the required sample bearing(s) from the completed lots of bearings for testing by the manufacturer.
D.Sampling Polyether Urethane and PTFE. The Department's representative shall select, at random, samples of the polyether urethane and the PTFE materials for testing by the Materials Bureau. All samples shall be taken in accordance with the Department's written instructions.
E.Calibration of the Test Equipment. The Manufacturer shall provide to the inspector calibration records which shall include the date tested, device identification number, and calibration test results and shall be certified for accuracy within 2% of the applied certification loads by a qualified independent testing laboratory wi thin the previous year. TABLE 716 -06 DISC BEARING SAMPLING AND TESTING REQUIREMENTS Test Performed By Samples Required Proof Load Manufacturer One production bearing per lot Coefficient of Friction Manufacturer One production bearing per lot
716-07 Pot -Design Structural Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 Physical Properties Polyether Urethane Structural Element Materials Bureau See requirements of 716 -03 Physical Properties of PTFE Sheet Materials Bureau See requirements of 716 -04
F.Oversize Bearings. Sample production bearings of such size that cannot be tested by the manufacturer at 150% design capacity for rotation shall be tested at actual design capacity. Bearings which are tested at actual design capacity will be tested at that capacity because it is not possible, or not practical in the Dep artment's opinion to test them at a higher capacity. Therefore, bearings tested at 150% design capacity which are rejected, will not be retested below 150% design capacity for the purpose of rendering such bearings acceptable. Sample production bearings th at cannot be tested by the manufacturer at their actual design capacity for rotation and/or friction shall be tested by an outside laboratory selected by the Materials Bureau. The Manufacturer shall assume the cost of this testing and submit the certified test results to the Materials Bureau.
G.Finish and Accessories. All exterior surfaces of sampled production bearings shall be smooth and free from irregularities or protrusions that might interfere with testing procedures. Bearings with tapered sole plat es which are selected for testing, shall be accompanied by a single unattached matching beveled plate. This plate shall be made of the same material and be the same size and thickness as the tapered plate. Additionally, the single beveled plate shall be so constructed that when placed in contact with the tapered sole plate the two shall form a single body, rectangular in shape and uniform in thickness.
H.Shipping Costs. The Contractor shall assume the cost of transporting all samples. BASIS OF ACCEPTANCE. Acceptance of Disc Bearings will be based on the manufacturer’s name appearing on the Department’s Approved List for Disc Bearings (716 -06) and performance testing results . Bearings will be considere d for acceptance in project lot quantities, or portions thereof, at the manufacturing site in accordance with the procedural directives of the Materials Bureau.
716-07 Pot -Design Structural Bridge Bearings
SCOPE. This specification covers the material requirements for pot -design structural bridge bearings. Bearings furnished under this specification shall adequately provide for the thermal expansion and contraction, rotation, camber changes, and creep and shrinkage of structural members, where applicable. GENERAL. Pot-design structural bridge bearings shall be supplied as fixed bearings; guided expansion bearings; and non -guided expansion bearings as designated by the Contract Documents.
A.Fixed Bearings. Fixed bearings shall allow rotation but no longitudinal or transverse movement in the bearing plane. Fixed bearings shall consist of an elastomeric rotational element, confined and sealed by a steel piston and steel base pot.
B.Guided Expansion Bearings. Guided expansion bearings shall allow rotation and longitudinal movement in the bearing plane; transverse movement shall be restricted. Guided expansion bearings shall consist of an elastomeric rotational element, confined and sealed by a steel piston and steel base pot. To allow l ongitudinal movement, the upper surface of the steel piston shall be faced with polytetrafluoroethylene (PTFE) sheet and support a sliding steel top bearing plate. The mating surface of the sliding steel bearing plate shall be faced with polished stainless steel. To restrict transverse movement, either a guide bar or keyway system shall be used. If required, the guide bar or keyway
716-07 Pot -Design Structural Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 systems and their mating steel surfaces shall be faced with strips of either PTFE or PTFE -stainless steel.
C.Non-Guided Expan sion Bearings. Non-guided expansion bearings shall allow rotation, longitudinal, and transverse movement in the bearing plane. Non -guided expansion bearings shall consist of an elastomeric rotational element, confined and sealed by a steel piston and steel base pot. To allow longitudinal and transverse movement, the upper surface of the steel piston shall be faced with polytetrafluoroethylene (PTFE) sheet and support a sliding steel top bearing plate. The mating surface of the sliding steel bearing plate sh all be faced with polished stainless steel. MATERIAL REQUIREMENTS. All material shall be new and unused, with no reclaimed material incorporated in the finished bearing.
A.Elastomeric Rotational Element. The elastomeric rotational element used in the co nstruction of potdesign bearings shall contain only virgin crystallization resistant polychloroprene (neoprene) or virgin natural polyisoprene (natural rubber) as the raw polymer. The physical properties of neoprene and natural rubber used in these bearing s shall conform to ASTM or AASHTO requirements, with modifications as noted, in Table 716 -07-1. TABLE 716 -07-1 PHYSICAL REQUIREMENTS OF ELASTOMERIC BEARING MATERIAL Elastomeric Compound ASTM Requirement AASHTO Standard Specifications for Bridge Neoprene D2000, Line Call Out M2BC517A14B34 Section 2.25.2, Materials, 50 Durometer Hardness Natural Rubber D2000, Line Call Out M4AA517A13B33 Section 2.25.2, Materials, 50 Durometer Hardness NOTES:
1.The Shore A Durometer hardness shall be 50±10 points.
2.Samples for compression set tests shall be prepared using a Type 2 die. The compression set of the neoprene specimens shall not exceed 35%. The compression set of the natural rubber specimens shall not exceed 25%.
3.For the purpose of determini ng conformance with these specifications, an observed or calculated value shall be rounded off to the nearest 10 psi for tensile strength, to the nearest 10% for elongation, and to the nearest 1% for the change in aged t ensile and aged elongation. Hardness and aged hardness shall be rounded off to the nearest point.
B.Sealant. If used, the type of sealant between the steel base pot and the top steel bearing plate shall be as recommended by the Manufacturer.
C.Sealing Rings. The sealing rings between the steel piston and the elastomeric rotational element shall be brass formed to the size recommended by the Manufacturer.
D.Steel. All steel except stainless steel components of the bearing shall conform to the requirements of the type of steel designated on the Contract Plans and applicable provisions of the New York State Steel Construction Manual (When the SCM requires DCES approval, delete the term DCES and replace it with the Regional Director).
E.Stainless Steel. Stainless s teel shall conform to the requirements of ASTM A167, or ASTM A240, Type 304. Stainless steel in contact with PTFE sheet shall be polished to a No. 8. bright mirror finish. The minimum thickness of the stainless steel shall be 0.050 inch.
F.Polytetrafluo roethylene Sheet and Strip. Polytetrafluoroethylene (PTFE) sheet and strip shall meet the requirements of 716 -04.
716-07 Pot -Design Structural Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 FABRICATION. The finish of the mold used to produce the elastomeric rotational elements shall conform to good machine shop practices. Every b earing shall have the Contract D#, Project Identification Number, NYSDOT Lot Number and individual bearing number indelibly marked with ink on a side that will be visible after erection. The PTFE shall be bonded to its grit blasted steel substrate using an epoxy resin adhesive under controlled factory conditions in accordance with the instructions of the adhesive manufacturer. Alternately, the PTFE sheet may be recessed into its steel substrate for one -half its thickness. The bearing manufacturer shall have the option of bonding recessed PTFE sheet. All steel surfaces exposed to the atmosphere, except stainless steel surfaces and metal surfaces to be welded or metalized , shall be cleaned to meet SSPC -SP10, “Near -White Metal Blast Cleaning” and painted in acc ordance with section 572, Structural Paint System: Shop Applied. The paint shall be selected from the Department’s Approved List, Structural Steel Paints – Class 1. For bearings used in conjunction with unpainted steel, the color of the finish coat shall Weathered Brown as defined by 708 - 05. Except as noted, all bearing surfaces of steel plates shall be finished or machined flat within 0.0008 inch/inch. Out-of-flatness exceeding the greater of 0.01 inch or 0.0008 inch/inch on any plate shall be cause for rejection . The bottom surfaces of lower bearing plates (masonry plates) designed to rest on bearing pads shall not exceed an out - of-flatness value of 0.005 inch/inch. Oxygen cut surfaces shall not exceed a surface roughness value of 1 mil, as defined by ASME B46.1. Repair, when necessary, shall conform to the requirements of the New York State Steel Construction Manual. The steel base pot of all bearings shall be either integrally machined or continuously welded to its bottom steel masonry plate. Unless otherwise approved by the Regional Director, all welding shall conform to, and all welders shall be qualified in accordance with, the requirements of the New York State Steel Construction Manual (When the SCM requires DCES approval, delete the term DCES and replace it with the Regional Director). Gross bearing dimensions shall have a tolerance of -0, +1/8 inch. PERFORMANCE CHARACTERISTICS
A.Sliding Coefficient of Friction. For all guided and non -guided expansion type pot -design bearings, the sliding coefficients of friction shall be measured at the bearing's design capacity, on the fifth and fiftieth cycles, at a sliding speed of 1 inch per minute. The sliding coefficient of friction shall be calculated as the horizontal load required to maint ain continuous sliding of one bearing, divided by the bearing's design capacity vertical load. The vertical load shall have been applied continuously for a minimum of 12 hours prior to testing. The test results will be evaluated as follows:
1.The measur ed sliding coefficients of friction shall not exceed 75% of the maximum design coefficient of friction
2.The bearing will be visually examined both during and after the test. Any resultant visual defects (such as bond failure, physical destruction, cold flow of PTFE, or damaged bearing components) shall be cause for rejection.
B.Rotation. For all pot -design bearings, the elastomeric rotational element shall be capable of maintaining its initial uniform contact with the steel piston and steel base pot th roughout a rotation range of 0.02 radians, under a compressive load equal to 150% of the design capacity of the bearing. The test results will be evaluated as follows:
1.The bearing will be visually examined both during and after the test. Any resultant defects shall be cause for rejection
716-07 Pot -Design Structural Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4
2.The sole plate, top bearing plate, and steel piston shall maintain continuous and uniform contact for the duration of the test. Any observed lift -off will be cause for rejection. DRAWINGS. The Contractor shall submit detailed shop drawings, drawn by the Manufacturer only, in conformance with the applicable requirements of the New York State Steel Construction Manual, for approval by the Regional Director prior to the start of the fabrication. (When the SCM requi res DCES approval, delete the term DCES and replace it with the Regional Director). In addition to the above requirements, the Manufacturer shall note the following on the shop drawings.
A.The total quantity of each kind of pot -design bearing required, (i.e. fixed, guided expansion, or nonguided expansion), grouped first according to type (load range) and then by actual design capacity
B.The thickness and plan area of the elastomeric rotational elements and the internal diameters of the steel base pots required
C.The maximum design coefficient of friction as noted on the Contract Plans
D.The type of PTFE sheet (filled or unfilled) and, if applicable, the type and amount (by weight) of Filler.
E.The type(s) of steel(s) to be used
F.If applicable, any welding process used in the bearing manufacture that does not conform to the approved processes of the New York State Steel Construction Manual shall be clearly described and detailed. (When the SCM requires DCES approval, delete the term DCES and replace it with the Regional Director).
G.The location of the fabrication plant
H.The Manufacturer's name and the name of the manufacturer's representative will be responsible for coordinating production, inspection, sampling and testing with the Materials Bureau. The Contractor shall also provide the Materials Bureau with written notification thirty (30) days prior to the start of the bearing fabrication. This notification shall include all of the information required as identifi ed above. A copy of this notification shall be sent to the Regional Director. SAMPLING AND TESTING .
A.Lot Size. Sampling, testing and acceptance consideration will be made on a lot basis. A lot shall be defined as the smallest number of bearings as determined by the following criteria:
1.A lot shall not exceed a single contract or project quantity
2.A lot shall not exceed 25 bearings
3.A lot shall consist of those bearings of the same type, regardless of load capacity. Bearing types shall be fixed type bearings or expansion type bearings. Guided and non -guided expansion bearings will be considered a single type.
716-08 (Vacant)
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 B. Sampling and Testing Requirements. The manufacturer shall furnish the required number and size of samples to perform testing in a ccordance with Table 716 -07-3. A minimum of thirty (30) days shall be allowed for the Department's inspection, sampling and testing of production bearings and component materials. All exterior surfaces of sampled production bearings shall be smooth and fre e from irregularities or protrusions that might interfere with testing procedures. The manufacturer shall select, at random, the required sample bearing(s) from completed lots of bearings for testing by the manufacturer. The manufacturer shall complete the required testing and determine compliance with this specification before submitting the lot(s) for inspection, sampling and acceptance consideration. The Department's representative shall select, at random, samples of elastomeric and PTFE materials for te sting by the Materials Bureau. All samples shall be taken in accordance with the Department's written instructions. The Contractor shall assume the cost of transporting all samples from the place of manufacture to the Materials Bureau and return, or, if ap plicable, to the project site. TABLE 716 -07-3 POT BEARING SAMPLING AND TESTING REQUIREMENTS Test Performed By Samples Required Proof Load Manufacturer One production bearing per lot1 Coefficient of Friction Manufacturer One production bearing per lot1 Physical Properties of Elastomeric Rotational Element Materials Bureau One elastomeric element per lot2 Physical Properties of PTFE Sheet Materials Bureau See requirements of 716 -04 NOTES:
1.Sample production bearings of such size that cannot be tested by the manufacturer at 150% design capacity for rotation shall be tested at actual design capacity. Bearings which are tested at actual design capacity will be tested at that capacity beca use it is not possible, or not practical in the Dep artment's opinion to test them at a higher capacity. Therefore, bearings tested at 150% design capacity which are rejected, will not be retested below 150% design capacity for the purpose of rendering such bearing s acceptable. Sample production bearings th at cannot be tested by the manufacturer at their actual design capacity for rotation and/or friction shall be tested by an outside laboratory selected by the Materials Bureau. The Manufacturer shall assume the cost of this testing and submit the certified test results to the Materials Bureau.
2.At the time of sampling the Department representative shall remove an elastomeric rotational element from a production bearing (not from a bearing that requires compressive strain testing) and forward it to the Mate rials Bureau for test. This testing will be destructive and the manufacturer shall, at the cost of the manufacturer, replace the sample elastomeric element. BASIS OF ACCEPTANCE. Acceptance of Pot Bearings will be based on the manufacturer’s name appearing on the Department’s Approved List for Pot Bearings (716 -07). Bearings will be considered for acceptance in project lot quantities, or portions thereof, at the manufacturing site in accordance with the procedural directives of the Materials Bureau.
716-08 (Vacant)
716-09 for Site Manager Use
716-10 Plain Elastomeric Bridge Bearings
SCOPE. This specification covers the material requirements for plain elastomeric bridge bearings. Bearings furnished under this specification shall be adequate for the specified design load, and provide for the thermal expansion and contraction, rotation, cam ber changes, creep, and shrinkage of structural members.
716-10 Plain Elastomeric Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 GENERAL. Plain elastomeric bridge bearings (Type EP bearings) are composed entirely of elastomeric material. They may be used for both fixed and expansion applications without changes in details. The bearings will accommodate longitudinal, transverse, and rotational movements. Elastomeric bridge bearings shall be designed in accordance with New York State Standard Specifications for Highway Bridges. MATERIAL REQUIREMENTS. All materials shall be new with no reclaimed material incorporated in the finished bearing. The elastomeric compound used in the construction of these bearings shall contain only virgin crystallization resistant polychloroprene (neoprene) or virgin natural polyisoprene (natural rubber) as the raw polymer. The resulting product shall be free of porous areas, weak sections, bubbles, foreign matter, or other defects affecting serviceability. The physical properties of the cured elastomeric compound shall meet the requirements of Table 716 -10-1. The manufacturer shall certify that the elastomeric compound passes Grade 3 Low - Temperature Brittleness as determined by ASTM D746 - Brittleness Temperature of Plastics and Elastomers by Impact Procedure B. DRAWINGS. Shop drawings are not required for Type EP bearings. FABRICATION. The finish of the mold used to produce these bearings shall conform to good machine shop practice. Each bearing shall be marked in indelible ink or flexible paint. The marking shall co nsist of the manufacturer's name and location. The marking shall be placed on at least one side or face that will be visible after erection and, if possible, on two sides or faces. TABLE 716 -10-1 PROPERTIES OF ELASTOMERIC MATERIAL PHYSICAL PROPERTIES: ASTM TEST METHOD REQUIREMENTS NEOPRENE NATURAL RUBBER Tensile Strength, Min., ( psi) Ultimate Elongation, Min., (%) D412 D412 2000 400 2000 NOTES:
1.Tolerances for samples cut from finished parts have already been applied to each of these requirements. No greater tolerances will be allowed.
2.For the purpose of determining conformance with these specifications, an observed or calculated value shall be rounded off to the nearest 10 psi for tensil e strength and to the nearest 10% for elongation. The bearings shall be cast in a mold under pressure and heat to the specified thickness. They may be molded and vulcanized in large sheets and cut to size. Cutting shall not heat the material, and the fin ish produced shall be equal to a surface roughness average of 2 mils as defined by ANSI B46.1. A type EP bearing that has been cut from a larger piece of material and fabricated to the finished size by bonding or plying smaller pieces together will not be acceptable.
A.Bearing Tolerances. Finished elastomeric bearings shall conform to the design dimensions, with the toler ances listed in Table 716 -10-2. TABLE 716 -10-2 BEARING TOLERANCES Dimension Tolerance Overall Vertical -0, +1/8 inch Overall Horizontal -0, +1/4 inch Position of Holes and Slots centerline ±1/16 inch from centerline Size of Holes, Slots and Internal Steel Plates -0, +1/16 inch
716-11 Steel Laminated Elastomeric Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 PERFORMANCE CHARACTERISTICS
A.Compression Deflection. The compression deflection of each bearing shall not exceed 10.0% of the design effective rubber thickness at a compressive load equal to the actual design load. The compression deflection shall be determined by loading the bearings to 500 psi and 800 psi. At each load a deflection reading will be taken and the readings used to calculate the slope between the two loads. The slope shall then be used to determine the deflection at the bearing's design load. The bearing and ambient temperature shall be 75 F ± 5 F at the time of testing. NOTE: For conformance to this specification an observed or calculated value shall be rounded off (ASTM E29) to the nearest 0.1% for compression deflection. BASIS OF ACCEPTANCE. Acceptance of this material will be based up on the manufacturer’s name appearing on the Department’s Approved List for Elastomeric Bridge Bearings, and a manufacturer’s certification stating conformance with these specifications.
716-11 Steel Laminated Elastomeric Bridge Bearings
SCOPE. This specification covers the material requirements for steel laminated elastomeric bridge bearings without external load plates. Bearings furnished under this specification shall be adequate for the specified design load, and provide for the thermal expansion and contraction, rotation, camber changes, creep, and shrinkage of structural members. GENERAL. Steel laminated elastomeric bridge bearings (Type EL bearings) are composed of multiple laye rs of elastomeric material separated by steel plates. They may be used for both fixed and expansion applications without changes in details. The bearings will accommodate longitudinal, transverse, and rotational movements. Elastomeric bridge bearings sha ll be designed in accordance with New York State Standard Specifications for Highway Bridges. MATERIALS REQUIREMENTS. All materials shall be new with no reclaimed material incorporated in the finished bearing.
A.Elastomeric Material. The elastomeric compound used in the construction of these bearings shall contain only virgin crystallization resistant polychloroprene (neoprene) or virgin natural polyisoprene (natural rubber) as the raw polymer. The resulting product shall be free of porous areas, weak sections, bubbles, foreign matter, or other defects affecting serviceability. The physical properties of the cured elastomeric compound shall be determined by using samples taken from bearings and shall meet the requirements of Table 7 16-10-1. The manufacturer shall certify that the elastomeric compound passes Grade 3 Low - Temperature Brittleness as determined by ASTM D746 - Brittleness Temperature of Plastics and Elastomers by Impact Procedure B.
B.Internal Steel Plates. Steel plat es for internal laminates shall be rolled mild steel conforming to the require ments of ASTM A36M, ASTM 1008/A1008/M or ASTM 1011/A 1011/M (Grade 33, 36 and 40). DRAWINGS. Shop drawings are not required for Department approval unless a change in the detail s shown on the plans is proposed. When Department approved shop drawings are required, they shall be furnished in accordance with the Steel Construction Manual (SCM), Section 2, except that in place of two sets of Department approved drawings submitted to the designated Shop
716-11 Steel Laminated Elastomeric Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 Inspection Agency, five sets of Department approved drawings shall be submitted to the Materials Bureau. The Contractor shall submit one copy of these drawings to the Engineer. When the bearing details are identical to the plans, the Contractor shall be responsible for supplying shop drawings prepared by the Manufacturer. The Manufacturer shall certify that the bearings depicted on the drawings are in conformance with the contract documents. The Contractor shall submit one copy of the certified drawings to the Engineer and five copies of their certified drawings to the Materials Bureau. The Department's acceptance procedures will commence subsequent to receipt of these drawings. The Manufacturer shall note the following on all shop drawings:
A.The Contract number, bridge identification number (BIN), feature carried/feature crossed, specification pay item no. and the type, size and quantity of bearings being produced.
B.The design load (dead load plus live load) for each type and size bearing. If bearings of the same type and size are designed for differing load conditions the maximum design load shall be noted.
C.The effective rubber thickness, typical laminate thickness, compressive area, shear area and shape factor.
D.The Manufacturer's name, the location of the fabrication plant and the name and phone number of the Manufacturer's representative who will coordinate production, inspection, and sampling and testing with the Materials Bureau.
E.The specification reference a nd grade of steel used. FABRICATION. The finish of the mold used to produce these bearings shall conform to good machine shop practice. Each bearing shall be marked in indelible ink or flexible paint. The marking shall consist of the manufacturer's nam e, contract number, lot number, and individual bearing number. The marking shall be placed on at least one side or face that will be visible after erection and, if possible, on two sides or faces. Type EL bearings shall be cast as a single unit in a mold and bonded and vulcanized under pressure and heat to the specified size and thickness. The internal steel plate(s) shall be commercially blast cleaned to a condition matching that of SSPC -Vis1, Pictorial Standards A SP6, B SP6 or C SP6, and cleaned of all oil or grease before bonding.
A.Bearing Tolerances. Finished elastomeric bearings shall conform to the design dimensions, with the tolerances listed in Table 716 -11 and the following details: TABLE 716 -11 BEARING TOLERANCES Dimension Tolerance Overall Vertical -0, +1/8 inch Overall Horizontal -0, +1/4 inch Position of Holes and Slots centerline ±1/16 inch from centerline Size of Holes, Slots and Internal Steel Plates -0, +1 /16 inch Edge Cover over External Steel Plates1 1/8 inch min. Bedding Surface (Top and Bottom) Over Internal Steel Plates 1/4 inch min. NOTES:
716-11 Steel Laminated Elastomeric Bridge Bearings
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 1. No edge cover will be required over internal details that will not be exposed after erection (i.e. - vertical holes covered by bearing seats or flanges).
2.For 716 -12, With external load plate(s) there shall be an effective rubber laminate between the load plate(s) and internal steel plate(s).
1.Internal Steel Plates. The internal steel plates shall be checked for parallelism by measuring the distance between each individual steel plate, and between the top or bottom edge of the bearing to the first adjacent steel plate. For rectangular bearings, take measurements f or each plate along the vertical surface of the bearing, located 1 inch from the edge of the four alternate corners. For round bearings, measurements will be taken at four points located at 90 intervals around the perimeter. The smallest of the four measurements shall be recorded for each plate. The cumulative total of these measurements shall not be less than 75% of the design effective rubber thickness.
2.Elastomeric Laminae. The average thickness of individual layers of elastomer in steel laminat ed elastomeric bearings shall not vary more than ±20% of the design thickness and in no case exceed the design thickness by 1/8 inch . Average thickness will be calculated from measurements taken at four points, located at 1 inch from the edge of the four alternate corners for rectangular bearings and at 90 intervals around the perimeter for round bearings. PERFORMANCE CHARACTERISTICS
A.Compression Deflection. The compression deflection of each bearing shall not exceed 10.0% of the design effective rubber thickness at a compressive load equal to the actual design load. The compression deflection shall be determined by loading the bearings to 500 psi and 800 psi. At each load a deflection reading will be taken and the readings used to calculate a slope between the two loads. The slope shall then be used to determine the deflection at the bearing's design load. The bearing and ambient temperature shall be 75 F ± 5 F at the time of testing.
B.Adhesion. The adhesion of the elastomer to the internal plates shall be demonstrated by subjecting the bearing to a compressive load equal to 150% of the actual design load. Upon visual examination, the bearing shall be free of visual defects. The bearing and ambient temperature shall be 75 F ± 5 F at the time of testing. NOTE: For conformance to this specification an observed or calculated value shall be rounded off (ASTM E29) to the nearest 0.1% for compression deflection. SAMPLING AND TESTING
A.Lot Size. Sampling, testing and acceptance consideration will be made on a l ot basis. A lot shall be defined as those bearings presented for inspection at a specific time or date. A lot shall be further defined as the smallest number of bearings as determined by the following criteria:
1.A lot shall not exceed a single contract quantity.
2.A lot shall consist of bearings with the elastomer being of the same dimensions and configuration.
3.A lot shall consist of bearings produced in a continuous manner.
B.Procedure. The Department's representative shall select at random the required sample bearings from completed lots of bearings for testing by the Materials Bureau. Bearings with a
716-12 Elastomeric Bridge Bearings With External Load Plates
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 plan area of less than 4 sf shall be tested for performance characteristics by the M aterials Bureau. Bearings with a plan area greater than 4 sf shall be tested by an outside laboratory approved by the Materials Bureau. The Department shall assume the cost of testing the sampled bearings and the Contractor shall assume the responsibilit y and cost of transporting the sampled bearings from the place of manufacture to the testing laboratory. After testing, the Contractor has the responsibility for the cost of transporting the sampled bearings back to the bearing manufacturer or, if applica ble, to the project site. All samples shall be taken and delivered for tests in accordance with the Department's written instructions. A minimum of thirty (30) days shall be allowed for inspection, sampling and testing by the Materials Bureau. This thirt y days is exclusive of shipping time which is the Contractor's responsibility. The sampling procedure and test methods may be obtained from the Materials Bureau. BASIS OF ACCEPTANCE. Acceptance of this material will be based on the manufacturer's name ap pearing on the Department's Approved List for Elastomeric Bridge Bearings and in accordance with the procedural directives of the Materials Bureau.
716-12 Elastomeric Bridge Bearings With External Load Plates
SCOPE. This specification covers the material requirements for elastomeric bridge bearings with external load plates. Bearings furnished under this specification shall be adequate for the specified design load, and provide for the thermal expansion and contrac tion, rotation, camber changes, and creep and shrinkage of structural members. GENERAL. Elastomeric bridge bearings with external load plates (Type EB bearings) are composed of either plain elastomeric or laminated elastomeric bearings with external stee l load bearing plates. The steel load bearing plates are bonded to the elastomer by vulcanization during the primary molding process. These bearings may be used for both fixed and expansion applications with appropriate changes in details, as shown on th e contract plans. The bearings will accommodate longitudinal, transverse, and rotational movements. Elastomeric bridge bearings with external load plates shall be designed in accordance with New York State Standard Specifications for Highway Bridges. MAT ERIALS REQUIREMENTS. All materials shall be new with no reclaimed material incorporated in the finished bearing.
A.Elastomeric Material. The elastomeric compound used in the construction of these bearings shall contain only virgin crystallization resis tant polychloroprene (neoprene) or virgin natural polyisoprene (natural rubber) as the raw polymer. The resulting product shall be free of porous areas, weak sections, bubbles, foreign matter, or other defects affecting serviceability. The physical proper ties of the cured elastomeric compound shall be determined by using samples taken from bearings and shall meet the requirements of Table 716 -10-1. The manufacturer shall certify that the elastomeric compound passes Grade 3 Low - Temperature Brittleness a s determined by ASTM D746 - Brittleness Temperature of Plastics and Elastomers by Impact Procedure B.
B.Internal Steel Plates. Steel plates for internal laminates shall be rolled mild steel conforming to the requirements of ASTM A36, or ASTM 1008/A 1008/M ASTM 1011/A 1011/M (Grade 33, 36 and 40).
C.External Load Bearing Plates and Steel Backing Plates. External load bearing plates shall conform to the requirements of ASTM A36 and to the requirements of the Steel Construction Manual (SCM), unless otherwise provided for in the contract documents.
716-12 Elastomeric Bridge Bearings With External Load Plates
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 Except as noted, all bearing surfaces of steel plates shall be finished or machined flat within 0.0008 inch/inch. Out-of-flatness exceeding the greater of 0.01 inch or 0.0008 inch/inch on any plate shall be cause for rejection . The bottom surfaces of lower bearing plates (masonry plates) designed to rest on bearing pads shall not exceed an out - of-flatness value of 0. 005 inch/inch. Oxygen cut surfaces shall not exceed a surface roughness value of 1 mil, as defined by ASME B46.1. Repair, when necessary, shall conform to the requirements of the New York State Steel Construction Manual. External load bearing plate surface s to be welded shall be painted with one coat of lacquer or other protective coatings approved by the Director of the Materials Bureau. This coating shall be removed before welding. All surfaces shall be cleaned and painted in accordance with §572, Struc tural Steel Paint System, Shop Applied. Color shall match that of the finish coat of other structural steel. For bearing used in conjunction with unpainted steel, the finish coat shall match “Weathered Brown” as defined by 708 -05 Standard Paint Colors . DRAWINGS. Department approval of shop drawings are not required unless a change in the details shown on the plans is proposed. When Department approved drawings are required, they shall be furnished in accordance with SCM, Section 2, except that in place of two sets of Department approved drawings submitted to the designated Shop Inspection Agency, five sets of Department approved drawings shall be submitted to the Materials Bureau. The Contractor shall submit one copy of these drawings to the Engineer. When the bearing details are identical to the plans, the Contractor shall be responsible for supplying shop drawings prepared by the manufacturer. The manufacturer shall certify that the bearings depicted on the drawings are in conformance with the contr act documents. The Contractor shall submit one copy of the certified drawings to the Engineer and five copies of their certified drawings to the Materials Bureau. The Department's acceptance procedures will commence subsequent to receipt of these drawings . The Manufacturer shall note the following on all shop drawings:
A.The Contract number, bridge identification number (BIN), feature carried/feature crossed, specification pay item no. and the type, size and quantity of bearings being produced.
B.The design load (dead load plus live load) for each type and size bearing. If bearings of the same type and size are designed for differing load conditions the maximum design load shall be noted.
C.The effective rubber thickness, typical laminate thickness, compressive area, shear area and shape factor.
D.The Manufacturer's name, the location of the fabrication plant and the name and phone number of the manufacturer's representative who will coordinate production, inspection, and sampling and tes ting with the Materials Bureau.
E.The specification references and grades of steel to be used.
F.All welding procedures to be used in the manufacture of the bearings. WELDING PROCEDURE. The bearing manufacturer shall submit a Welding Procedure to the Deputy Chief Engineer Structures (DCES) for each welding process to be used in the manufacture of the bearings. No welding shall be performed until the manufacturer receives an approved Welding Procedure. FABRICATION. The finish of the mold used to produce these bearings shall conform to good machine shop practice. Each bearing shall be marked in indelible ink or flexible paint. The
716-12 Elastomeric Bridge Bearings With External Load Plates
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 marking shall consist of the manufacturer's name, cont ract number, lot number, and individual bearing number. The marking shall be placed on at least one side or face that will be visible after erection and, if possible, on two sides or faces. The bearings shall be cast as a single unit in a mold and bonded and vulcanized under pressure and heat to the specified size and thickness. They shall be cast as a single unit with the external load plate(s) bonded to the elastomer by vulcanization during the primary molding process. If internal steel plate(s) are req uired, they shall be commercially blast cleaned to a condition matching that of SSPC -Vis1, Pictorial Standards A SP6, B SP6 or C SP6, and cleaned of all oil or grease before bonding. During any welding, the temperature of the steel adjacent to the elastome r shall not exceed
F.Temperature shall be controlled by welding procedures and temperature indicating crayons, or other devices approved by the Engineer. Unless otherwise approved by the DCES, all welding shall conform to, and all welders shall be qualified in accordance with the requirements of the SCM.
A.Bearing Tolerances. Finished elastomeric bearings shall conform to the design dimensions, with the tolerances listed in Table 716 -11 and the following details:
1.Internal Steel Plates. The internal steel plates shall be checked for parallelism by measuring the distance between each individual steel plate, and between the top or bottom edge of the bearing to the first adjacent steel plate. For rectangular bearings, take measurements for each plate along the vertical surface of the bearing, located 1 inch from the edge of the four alternate corners. For round bearings, measurements will be taken at four points located at 90 intervals around the perimeter. The smallest of the four measurements shall be recorded for each plate. The cumulative total of these measurements shall not be less than 75% of the design effective rubber thickness.
2.Elastomeric Laminae. The average thickness of individual layers of elastomer in steel laminated elastomeric bearings shall not vary more than ±20% of the design thickness and in no case exceed the design thickness by 1/8 inch . Average thickness will be calculated from measurements taken at four points, located at 1 inch from the edge of the four alternate corners for rectangular bearings and at 90 intervals around the perimeter for round bearings.
B.Performance Characteristics
1.Compression Deflection. The compression deflection of each bearing shall not exceed 10.0% of the design effective rubber thickness at a compressive load equal to the actual design load. The compression deflection shall be determined by loading the bearings to 500 psi and 800 p si. At each load a deflection reading will be taken and the readings used to calculate a slope between the two loads. The slope shall then be used to determine the deflection at the bearing's design load. The bearing and ambient temperature shall be 75 F ± 5 F at the time of testing.
2.Adhesion. The adhesion of the elastomer to the internal plates shall be demonstrated by subjecting the bearing to a compressive load equal to 150% of the actual design load. Upon visual examination, the bearing shall be free of visual defects. The bearing and amb ient temperature shall be 75 F ± 5 F at the time of testing. NOTE: For conformance to this specification an observed or calculated value shall be rounded off (ASTM E29) to the nearest 0.1% for compression deflection.
716-99 for Site Manager Use
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 700 STANDARD SPECIFICATIONS (USC) May 1, 202 4 VOLUME 4 SAMPLING AND TESTING
A.Lot Size. Sampling, testing and acceptance consideration will be made on a lot basis. A lot shall be defined as those bearings presented for inspection at a specific time or date. A lot shall be further defined as the smallest number of bearings as determined by the following criteria:
1.A lot shall not exceed a single contract quantity
2.A lot shall consist of bearings with the elastomer being of the same dimensions and configuration
3.A lot shall consist of bearings produced in a continuous manner.
B.Procedure. The Department's representative shall select at random the required sample bearings from completed lots of bearings for testing by the Materials Bureau. The manufacturer shall supply the Department's representative with a copy of an approved Welding Procedure for each welding process used in the manufacture of the bearings. Bearings with a plan area greater than 4 sf shall be tested by an outside laboratory approved by the Materials Bureau. The Department shall assume the cost of testing the sampled bearings and the Contractor shall assume the responsibility and cost of transporting the sampled bearings from the place of manufacture to the testing laboratory. After testing the Contractor has the responsibility for the cost of transporting th e sampled bearings back to the bearing manufacturer or, if applicable, to the project site. All samples shall be taken and delivered for test in accordance with the Department's written instructions. A minimum of thirty (30) days shall be allowed for inspection, sampling and testing by the Materials Bureau. This thirty days is exclusive of shipping time which is the Contractor's responsibility. The sampling procedure and test methods may be obtained from the Materials Bureau. BASIS OF ACCEPTANCE. Acceptance of this material will be based on the manufacturer's name appearing on the Department's Approved List for Elastomeric Bridge Bearings and in accordance with the procedural directives of the Materials B ureau.
716-99 for Site Manager Use
SECTION 717 - CONCRETE PROTECTIVE COATINGS (Last Revised January , 2020)
717-01 for Site Manager Use
717-02 Waterproofing Membranes
SCOPE. This specification covers the material requirements for waterproofing membranes. MATERIAL REQUIREMENTS. Waterproofing membranes shall be spray applied, hot -applied, or sheet applied. All materials used shall be as per each manufacturer’s recommendations. Approved Materials Details will be available on the Department’s Approved List. BASIS OF APPROVAL. Manufacturers shall submit their product(s) for evaluation to the Director, Materials Bureau. All components of the membrane system shall be clearly identified in the Materials Details submitted to the Depa rtment for approval. The Details shall also contain all the preparation
Source: New York Standard Specifications, 2024 Edition. Pages 1057–1074 of 1,264.