Bridge Expansion Joints Art. 520.03 computed using the plan diameter of the shaft multiplied by the measured length of the shaft. The length of shaft in soil will be computed as the difference in elevation between the top of the drilled shaft shown on the plans, or as installed as part of the Contractor’s installation procedure, and the bottom of the shaft or the top of rock (when present) whichever is higher. The length of shaft in rock will be computed as the difference in elevation between the measured top of rock and the bottom of the shaft. When permanent casing is specified, it will be measured for payment in place, in feet (meters). Permanent casing installed at the Contractor’s option will not be measured for payment. Reinforcement furnished and installed will be measured for payment according to
Article 508 — 07.
516.16 Basis of Payment. This work will be paid for at the contract unit price
per cubic yard (cubic meter) for DRILLED SHAFT IN SOIL, and/or DRILLED SHAFT IN ROCK. Permanent casing will be paid for at the contract unit price per foot (meter) for PERMANENT CASING. Reinforcement furnished and installed will be paid for according to Article 508.11. Obstruction mitigation will be paid for according to Article 109.04. SECTION 520. BRIDGE EXPANSION JOINTS
520.01 Description. This work shall consist of constructing bridge expansion
joints.
520.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Preformed Elastomeric Joint Seals for Bridge Decks ........................ 1053.02
b.Preformed Elastomeric Strip Seals for Bridge Decks ......................... 1053.03
c.Structural Steel .................................................................................. 1006.04
d.Neoprene Expansion Joint ...................................................................... 1052
e.Stud Shear Connectors ..................................................................... 1006.32
f.Fabric Reinforced Elastomeric ................................................................ 1028
g.Stainless Steel Hardware .............................................................. 1006.29(d)
h.Chemical Adhesive Resin System ..................................................... 1027.01 CONSTRUCTION REQUIREMENTS
520.03 Steel Fabrication. The plates, angles, and other structural shapes
supporting joint seals shall be fabricated to satisfy shop drawing details and conform to the configuration of the concrete deck or sidewalk. The fabrication shall be according to Articles 505.04 through 505.10. The anchor studs shall be welded prior to painting or galvanizing. Art. 520.03 Bridge Expansion Joints For finger plate expansion joints the fabricator shall be certified according to
Article 106 — 08(e) and shop drawings shall be submitted according to Article 505.03.
For other joints, shop drawings need not be submitted for approval before fabrication, but the manufacturer shall supply them with the completed joint to the Contractor and Engineer. The manufacturer shall have current, pre-approved shop standards detailing the various standard components for the joint system(s) supplied on file with the Department prior to installation. The pre-approved shop standards shall be included with the shop drawings. After fabrication, the steel plates or locking edge rail supports shall receive one shop coat of paint according to Section 506. At the manufacturer’s option, the steel components may be hot dip galvanized according to AASHTO M 111 and ASTM A 385 in lieu of shop painting.
520.04 Joint Opening. The components of the joint system shall be properly
aligned and set prior to casting them into the deck or anchorage material. The joint opening shall be measured parallel to centerline of roadway and shall be adjusted according to the temperature at the time of placing so that the specified opening will be secured at a temperature of 50 °F (10 °C). The opening for each 100 ft (10 m) of bridge between the nearest fixed bearings each way from the joint shall be reduced 1/8 in. (1 mm) corrected for skew from the amount specified, for each 15 °F (8 °C) the temperature at the time of placing exceeds 50 °F (10 °C) and increased 1/8 in. (1 mm) corrected for skew from the amount specified, for each 15 °F (8 °C) the temperature at the time of placing is below 50 °F (10 °C).
520.05 Joint Preparation. Prior to installation of the joint seal, all thin shells
of mortar and projections of concrete into and around the joint space likely to spall under movement or prevent the proper operation of the joint shall be carefully removed and all forms and debris shall be removed from the joint opening.
520.06 Preformed Elastomeric Joint Seals. Joints shall be clean
immediately prior to application of the adhesive. Temperature limitations of the adhesive, as specified by the manufacturer, shall be observed. The seal shall be installed in a compressed condition and secured in place with adhesive covering both sides of the seal over the full area in contact with the sides of the joint. The seal shall be in one continuous piece for the full length of the joint. The continuous piece for installation shall not have more than one manufacturer’s butt splice within its length. If the splice is torn or damaged, the seal shall be replaced.
520.07 Neoprene Expansion Seals. The neoprene expansion seals shall be
installed according to the manufacturer’s specifications, shop drawings, and as specified herein. The shop drawings, along with joint details, shall include details of the concrete blockout, if required for the installation, a layout plan of the joint units to be used, and the spacing and location of the anchor bolts or studs. Anchors shall be properly positioned by the use of a suitable template and shall be cast-in-place bolts or by drilling and setting anchor rods according to
Article 509 — 06.
Bridge Expansion Joints Art. 520.08 Concrete or metal surfaces on which the neoprene expansion joints are to be set shall be dry, clean, level, and sound with no broken or spalled concrete. Adjacent joint seats shall be on a common plane with each other. Joint seals shall not be placed until the Engineer has approved the blockout. Errors shall be corrected by grinding or other approved procedures, including, if necessary, concrete removal and replacement to obtain proper alignment. The neoprene molded sealing element shall be furnished and installed in one continuous, unbroken length for the entire joint length including parapets, curbs, and walls. The seal shall be installed in an adhesive/sealant bedding compound in the blockout as shown on the plans. Neoprene surfaces to be in contact with adhesive shall be cleaned with a solvent as recommended by the manufacturer, prior to installation. The adhesive/sealant shall be liberally applied over the entire blockout or metal seat area as the sealing element is set into it. The anchor blocks shall then be set in position over the seal with the nuts torqued to at least 65 ft lb (90 N m). A minimum of 24 hours after initial installation, the nuts shall be retorqued to the initial 65 ft lb (90 N m). Prior to filling the space in the bolt wells, the Engineer's inspection of the anchor fasteners and tightening of the units will be required. All joints between units, around connecting bolts, and cavity plugs shall be sealed in a neat manner. Neoprene surfaces to be in contact with sealant shall be cleaned with a solvent as recommended by the manufacturer prior to sealing. Where longitudinal joints intersect with transverse joint seals, a positive seal shall be provided by flattening and extending the longitudinal joint neoprene seal element under the transverse joint pad. When this procedure is not practical, a separate neoprene apron, bonded to the longitudinal seal element, may be used. The finished joint shall present a smooth, neat appearance with no protruding bolts or rough joints. Excess sealant shall be wiped or scraped away before it becomes hard. Upon completion of an entire joint, the Contractor shall grind any uneven end butt connections flush. Any openings between butt ends not showing sealant to the top shall be cleaned and filled with sealant. Where the joint pads are inset into the concrete blockouts, the edges between the concrete and the pads shall be sealed with sealant. When the bridge deck is to be waterproofed and surfaced, the installation of the joint shall be completed prior to placement of the deck waterproofing and hot-mix asphalt (HMA) surfacing.
520.08 Preformed Elastomeric Strip Seals. Preformed elastomeric strip
seals (strip seals) shall be installed according to the manufacturer’s specifications and as specified herein. The steel locking edge support rails for strip seals shall be either a one-piece extrusion (rolled section) or a combination of extruded and stock plate, shop welded according to Section 505. The locking portion of the steel edge support rail shall be extruded, with a cavity, properly shaped to allow the insertion of the strip seal gland and the development of a mechanical interlock. The top of the steel edge support rails shall be smooth and free of burrs. Preparation and placement of the gland will only be allowed after the anchoring material has fully cured. Art. 520.08 Bridge Expansion Joints Prior to placement of the strip seal, the cavity shall be cleaned of debris. Surface rusting shall be removed and any bare steel touched up according to
Article 506 — 10(c). The steel extrusion cavities shall be kept clean and dry until the
strip seal is placed. The placement of the strip seal will only be permitted when the ambient air and steel substrate temperatures are above the minimum temperature recommended by the manufacturer. Prior to inserting the strip seal in the steel retainer cavities, the “locking ears” portion of the seal shall be coated with adhesive/lubricant. A maximum of 5 ft (1.5 m) of gland shall be coated at a time to prevent the lubricant/adhesive from drying prior to insertion into the cavities of the steel locking edge rails. After each section is coated, the coated portion of the seal shall be inserted in the steel locking edge rail cavities.
520.09 Finger Plate Expansion Joint. This work shall include all stools,
shims, sliding and bent plates, fabric reinforced elastomeric trough, and other associated hardware necessary to construct the finger plate joint as detailed. The fabric reinforced elastomeric trough and flaps shall not be installed until all structural steel has been field painted. The trough shall be installed with the smooth elastomer compound surface on the inside of the trough. For abutment finger plate joints the trough shall be connected to the abutment backwall with predrilled anchor bolts utilizing the 1/4 x 2 in. (6 x 50 mm) plate as a template for drilling the holes. Cast in place concrete inserts will not be allowed. Following installation of the trough flattening plate, a suitable sealant shall be applied to prevent leakage between the trough and the backwall.
520.10 End Treatment. The end treatment for curbs, parapets, and
sidewalks shall be as detailed on the plans and as recommended by the manufacturer of the joint system.
520.11 Technical Support. The manufacturer shall supply technical support
during surface preparation and the installation of the entire joint system.
520.12 Method of Measurement. This work will be measured for payment in
place, in feet (meters), along the centerline of the joint. When paid for as a separate item, fabric reinforced elastomeric trough will be measured for payment in place, in feet (meters), along the centerline of the trough flow line.
520.13 Basis of Payment. This work will be paid for at the contract unit price
per foot (meter) for PREFORMED JOINT SEAL, of the design movement specified; PREFORMED JOINT STRIP SEAL, or FINGER PLATE EXPANSION JOINT, of the design movement specified; NEOPRENE EXPANSION JOINT, of the expansion range specified; or NEOPRENE EXPANSION JOINT (DAM). When a pay item is provided in the contract, the trough for finger plate expansion joints and all associated hardware will be paid for at the contract unit price per foot (meter) for FABRIC REINFORCED ELASTOMERIC TROUGH. Bearings Art. 521.06 SECTION 521. BEARINGS
521.01 Description. This work shall consist of furnishing and installing
bearings.
521.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Elastomeric Bearings .............................................................................. 1083
b.Structural Steel .................................................................................. 1006.04
c.Anchor Bolts and Rods ...................................................................... 1006.09
d.Neoprene Leveling Pad ..................................................................... 1052.02 CONSTRUCTION REQUIREMENTS
521.03 Metal Bearings. Metal bearings and metal bearing components shall
be fabricated according to Section 505. Exposed surfaces and other portions of the structural steel bearing plates shall be painted according to Article 506.09. During cleaning and painting, the stainless steel and PTFE sheet sliding surfaces and elastomers shall be protected from abrasion and paint.
521.04 Shipping and Handling. The bearing assemblies shall be furnished
as a complete unit from one manufacturing source. Bearing assemblies shall be furnished, packaged, and handled in such a manner that the bearing assembly will be protected from damage.
521.05 Setting of Bearings. Fixed and expansion bearings on concrete shall
be set level and not be placed upon areas that are improperly finished, damaged, or irregular. The concrete under each bearing shall be finished smooth and level, within 1/8 in. (3 mm) of the specified elevation before the bearings are placed. The location of expansion bearings shall correspond with the temperature at the time of erection. Leveling plates, pads, and/or adjustment shims shall be placed as shown on the plans. Bearing plates to be cast into concrete superstructures shall be secured in the proper position, and all wedges or blocking used to position expansion bearings shall be removed as soon as practicable after the concrete is placed.
521.06 Anchor Bolts, Rods, and Side Retainers. Anchor bolts and rods
shall be hot-dip galvanized. Side retainers shall be painted or hot-dip galvanized according to Article 506.09. Anchor rods shall be drilled and set according to Article 509.06, except where anchor bolts are cast into the concrete. Before setting anchor rods with chemical adhesive, hole depths and diameters in the concrete will be verified. Holes shall be kept dry and shall be blown clean prior to installing the anchor rods.
Referenced in this section
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BRIDGE EXPANSION JOINTS in other states
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 438–442 of 1,217. View official source ↗