644-1 01
NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 SECTION 644 - OVERHEAD SIGN STRUCTURES (Last Revised September 2021)
644-1 Description
644-1.01 General. Under this work the Contractor shall fabricate, furnish and erect sign structures for
overhead signs in accordance with the contract documents. The Contractor shall notify the Deputy Chief Engineer, Structures (DCES) of the name and address of the fabricator of all overhead sign structures in accordance with §106 -01 Sources of Supply.
644-1.02 Definitions. Overhead Sign Structures (OSS) are structures with vertical supports and
horizontal arms or chords used to support signs over any portion of the roadway, including the shoulders. Span Wire Assemblies supporting overhead signs, and structures supporting both traffic signal equipment and overhead signs are covered under Section 680, Traffic Signals. Bridge fascia mounted signs, where the signage is intended for the under roadway, are also not covered in this Section. OSS are classified into the following three standard types (See Figure 644 -1):
A.Single Arm Cantilever. Single (horizontal) arm supported by a single (vertical) post.
B.Trussed Arm Cantilever. Two trussed arms supported by a single post. (If the arms are not trussed, the structure shall be classified as Non -Standard).
C.Span. Single span, four -chord (quad -chord) superstructure supported by trussed end posts. OSS that fall outside these categories are Non -Standard. This includes butterfly structures, multi - span structures, structures that are a combination of span and cantilevers, and all other overhead sign structures not included in §644 -1.02.
644-2 Materials
644-2.01 Steel for Sign Structures. Steel for component parts of sign structures shall meet the
requirements of the New York State Steel Construction Manual and the following: All material greater than 1/2 inch thick shall meet the Charpy V -Notch toughness requirements of §715 -01, Structural Steel. Chords, cantilevered arms, end posts, base plates, end and face plates for cantilever arm to post connections, and flange splice pl ates shall be considered main members. Diagonals, struts and gusset or tab plates shall be considered secondary members. Upon receipt at the fabrication plant, all main member material shall be traceable to a mill test report and traceability shall be maintained throughout the duration of the fabrication. All main member material thickness shall be a minimum of 1/4 inch.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 Single -Arm Cantilever Structure Single -Arm Butterfly Structure Trussed -Arm Cantilever Structure Trussed -Arm Butterfly Structure Single Span Structure End Frame
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 FIGURE 644 -1
A.Pipe. Pipe shall meet the requirements of one of the following specifications:
1.ASTM A 53, Welded and Seamless Steel Pipe, Grade B, Type E or S.
2.ASTM A 500, Welded and Seamless Steel Pipe, Grade B (Rounds Only)
3.ASTM A 252, Welded and Seamless Steel Pipe, Grade 2 or 3, provided that the chemical certifications m eet the requirements for ASTM A 53, Grade B, Type E or S.
4.API 5L American Petroleum Institute Specification 5L, Grade B In addition to the above material requirements, all pipe used for welded applications shall have a maximum Carbon Equivalency (CE) of 0.40 using the following equation: CE = %C + %Mn/6 + %Cu/40 + %Ni/20 + %Cr/10 - %Mo/50 - %V/10
B.Structural Steel. Structural steel for structural shapes, plates, and bars shall meet the requirements of §715 -01, Structural Steel, and the ASTM Specification noted on the contract documents. Cutting and drilling shall be done in such a manner that the resulting surface s are free from any gouges or burrs.
C.Anchor Bolts, Nuts and Washers. Anchor bolts, nuts and washers shall meet the requirements of the following:
1.ASTM F 1554 , Grade 55 with Supplementary Requirement S4, Charpy Impact Requirement Anchor bolts, nuts, and washers shall be galvanized in accordance with the requirements of Materials Detail 719 -01 Type II, Galvanized Coatings and Repair Methods - Zinc Coating (Hot Dip) on Iron and Steel Hardware. Anchor bolts shall be the Unified Cours e Thread Series with Class 2A threads, and shall be galvanized full length. Nuts shall be Grade A, Heavy Hex.
D.High Strength Steel Bolts, Nuts and Washers. Bolted steel connections shall be made with bolts, nuts and washers meeting the material requirements of §715 -14, High Strength Bolts, Nuts and Combination Span and Cantilever Multi -Span Structure
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 Washers, and the galvanizing requirements of §719 -01, Galvanized Coatings and Repair Methods. Additionally, the Contractor shall provide documentation that the zinc coated fastener assemblies have satis fied the requirements of ASTM A3125 Annex 2 Rotational Capacity testing . Fasteners in main members shall be sampled and tested in accordance with Section 1001.5 of the New York State Steel Construction Manual, with the exception that the waiver for lot sizes less than 20 bolts shall not apply.
E.U-Bolts. U-Bolts shall conform t o material specification ASTM F 1554, Grade 36,and shall be galvanized in accordance with the requirements of Type II of §719 -01, Galvanized Coatings and Repair Methods.
F.Galvanizing. All steel shall be galvanized in accordance with §719 -01 Type I, except as noted above in §644 -2.01 C, D & E. Galvanizing shall provide a minimum coating of 3.9 mils. All welding, cutting and drilling shall be done prior to galvanization, and all bolting shall be done after galvanization, except as approved by the Engineer.
G.Acceptance. All steel furnished shall be documented in accordance with the requirements of §715 -01 Basis of Acceptance.
644-2.02 Concrete. All overhead sign structure foundations shall meet the requirements of Class A
concrete in Section 501, Portland Cement Concrete - General. The Contractor may submit, for approval by Director, Materials Bureau, a mix at least equivalent to the specifie d Class A Concrete. All precast concrete overhead sign structure foundations shall meet the requirements of §704 -03, Precast Concrete - General. For situations which require depositing structural concrete under water, provide Class G concrete as described in Table 501 -3 Concrete Mixtures and Table 501 -3A Pozzolan Substitutions . For design and construction purposes, the minimum compressive strength of concrete used in the foundations shall be 3000 psi @ 28 days .
644-3 Construction Details
644-3.01 Drawings. Shop drawings shall be required for all OSS in the contract documents. The
Contractor must submit shop drawings in accordance with the requirements of Section 2 in the New York State Steel Construction Manual.
644-3.02 Fabrication. All fabrication shall be performed in accordance with the requirements of the New
York State Steel Construction Manual.
A.Storage of Materials. Structural material shall be stored in a manner that will protect the materials from deformation, surface deterioration and accumulations of dirt, oil, or other foreign matter.
B.Straightening Materials. Prior to fabrication in the shop, all deformed structural materials shall be properly straightened by methods which are non -injurious. Sharp kinks and bends, and deep dents shall be cause for rejection.
C.Anchor Bolts. Where anchor bolts have been or are being set under a separate contract, the Contractor shall check the size, location, and spacing of anchor bolts before fabricating the structure.
D.Pole Markings. A Sign Structure Identification Number (SIN) shall be attached to the post using white numbers on a green background. The background shall be Green, Class A, Engineer Grade reflective sheeting as described in §730 -05, Reflective Sheeting, and shall be 1 2 inches wide by 6
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 inches high, with the corners cut to a 1 1/2 inch radius. The numbers shall be cut out from White, Class A, Engineer Grade reflective sheeting and shall be 3 inches high. The sheeting and numbers shall be applied in accordance with the manufacturer’s rec ommendations. The numbers shall be placed on the right near post, 45 degrees from the viewing direction of traffic, approximately 6 feet above the base plate, so as to be visible to the traveling public. For structures spanning more than one direction of traffic, or structures that span non -contiguous travel lanes, two posts shall be marked to facilitate identification by inspectors. The following information shall be stamped into the base plate in 1/2 inch letters to such a depth as to be clearly visible through subsequent galvanizing: Required Information Example Manufacturer’s name or logo ABC Fabricating Month and year of manufacture 06/2003 D Number D123456 SIN Number SIN 12345 For span type structures the marked base plate shall correspond to the marked posts, except that only one end of the span must be marked.
E.High Strength Bolts. Each bolt shall be furnished with a galvanized flat washer installed under the turned element. All connections shall be made by first tightening all nuts and bolts sufficiently to bring all components into full contact with each other. After full cont act has been achieved, all connections shall be brought to a condition beyond snug tight as required by Table 1001.3b of the New York State Steel Construction Manual. Fasteners shall be inspected after installation in accordance with Section 1001.4 of the New York State Steel Construction Manual. The inspection shall apply to a minimum of 10% of the connections randomly throughout the entire span of the structure. All holes for high strength bolts in main members shall be made in accordance with Section 613 of the New York State Steel Construction Manual. This requirement also includes all secondary members that are welded to main members.
F.Quality. Fabricators shall be certified in accordance with the American Institute of Steel Construction’s Quality Certification Program in the Simple Steel Bridge Structures Category, or an equivalent program acceptable to the DCES.
G.Inspection. Provisions for shop inspection shall be in accordance with the New York State Steel Construction Manual.
H.Assembly. All OSS shall be fully assembled in the fabrication shop to ensure proper fitup.
I.Acceptance For Shipping. Each section of a sign structure shall bear the QA inspector’s mark of acceptance prior to shipping.
644-3.03 Transportation. Sign structures (including posts and post assemblies) shall be shipped by flat
bed trailer or other similar means. Structures shall be shimmed, braced, blocked, and tied down to prevent distortion or other damage from occurring during transportation. The use of any device which does not support the member for its entire length, as described below, shall not be permitted. This prohibition includes, but is not limited to, dolly wheels and pole trailers. Sections less than 50 feet in length shall be, at a minimum, supported at the midspan and end points. Sections 50 feet and longer shall be, at a minimum, supported at the ends and at the quarter points.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 Adhering to these requirements does not relieve the Contractor of the responsibility for damage to the structure en route.
644-3.04 Excavation. All excavation shall conform to Section 206, Trench, Culvert and Structure
Excavation. Excavation shall not be performed until immediately before installation of the footings, or any other appurtenances. The excavated material shall be placed in a location or locations selected by the Contractor so as to cause the least inconvenience to vehi cular and pedestrian traffic and to avoid interference with surface drainage. All surplus excavated material shall be removed and disposed of by the Contractor as specified in Section 203, Disposal of Surplus Excavated Material Excavation shall be backfilled as specified in Section 203, Select Structure Fill The outline of all areas to be removed in sidewalks, driveways, and pavement shall be saw cut to a depth of at least 3 inches prior to removal. Cuts shall be neat and true along score lines with no shatter outside the removal area. Damaged saw cut areas s hall be recut. Pavement, shoulder, sidewalks, curbs, driveways, lawns, plants and other such features shall be replaced in kind with material of equal quality or as shown in the contract documents. For transverse sidewalk, curb or gutter cuts in concrete the entire squa re or section shall be removed and replaced with the same kind and quality of material. For longitudinal cuts in concrete sidewalks only the area removed between sawcuts shall be replaced unless specified otherwise in the contract documents. Whenever a part of a square or slab of existing concrete sidewalk, curb, gutter or driveway is broken or damaged by this work, the entire square, section or slab shall be removed and replaced with the same kind and quality of material, at no additional cos t to the State.
644-3.05 Concrete Foundations. Foundations shall be constructed as shown in the contract documents.
The Contractor shall establish the location and elevation of foundation, prior to the start of construction, based on the information shown in the contract documents and data derived f rom field surveys. Locations and elevations will be verified by the Engineer prior to the start of construction. The Contractor has the option, unless specifically disallowed in the contract documents, to use either Drilled Shafts or Rectangular Footings for Overhead Sign Structures, if both types are detailed in the contract plans. When both foundation types are de tailed and permitted, the Department has prepared the contract documents based on the presumed less expensive foundation type. If the Contractor elects to change from one type of foundation to the other under this option, it shall be done at no additional cost to the State. The Contractor shall notify the Engineer of the decision to change foundation type. Excavation for these items shall be as specified in §644 -3.04. All concreting operations shall conform to Section 555, Structural Concrete. Reinforcing steel shall conform to Section 556, Reinforcing Steel for Concrete Structures. The allowable tolerance from verticality for the drilled shaft or pedestal shall be 2.5%. The allowable tolerance for the top of shaft elevation or pedestal elevation shall be + 1/4 inch, -0 inch. Stripping of forms and subsequent loading of foundations shall be in accordance with §555 -3, in Table 555 -4, under “Pier Columns”. Placing the sign panels on an overhead sign structure is assumed to be equivalent to placing superstructure loads on a bridge.
A.Drilled Shafts for Overhead Sign Structures. Work under this item shall consist of the layout and construction of Drilled Shaft foundations for Overhead Sign Structures. This work may require rock drilling, installing rock sockets, dewatering, the use of temporary casing, slurry, or other means necessary to keep the hole open. Formwork shall be required for the portion of the shaft above finished grade. Holes for drilled shafts shall be pre -augered. Precaution shall be taken to protect the holes from collapse. Holes shall contain no free water, nor any loose material at the time of concrete placement. The holes shall be filled with Class A concrete placed in direct contact with the soil. Casing, if used, shall be removed prior to concrete placement. If unable to dewater the shaft and place Class A
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 concrete due to the presence of groundwater and loose cohesionless soil at the base of the drilled shaft, proceed with the installation by not dewatering the shaft excavation and place Class G tremie concrete in accordance with §555 -3.05 Depositing Structu ral Concrete Under Water. The bottom of the shaft excavation shall be cleaned of loose material to the satisfaction of the Engineer immediately prior to concreting. Where a temporary casing is used to assist in pouring a concrete shaft, the casing shall be removed as the concrete is placed. Precast shafts shall not be permitted.
B.Rectangular Footings for Overhead Sign Structures. Work under this item shall consist of the layout and construction of conventional rectangular spread footings, either cast -in-place or precast. This work may require the use of protective sheeting.
644-3.06 Erection of Sign Structures
A.Methods and Equipment. Before starting work, the Contractor shall submit details of the method of erection and types of equipment he proposes to use, to the Engineer for review and approval. Approval shall not relieve the Contractor of the responsibility for the safety of the methods or equipment, or for damage to the structures due to overloading.
B.Handling and Storage. Structural members shall be loaded, moved, and unloaded in a manner that prevents stresses in excess of those provided for by the structure design. Permanent distortion, or other damage attributable to the Contractor's operations, shall be cause for reje ction. Members stored either in the fabricator's storage area, or at the work site, or at other storage areas, shall be supported off the ground in a manner that will not allow distortion, or other damage to occur.
C.Lifting. Erection of overhead sign structures shall be done in accordance with §107 -05P. Lifting . Lift Plans are required, and shall be provided in accordance with §107 -05P.3. Nylon slings, or an equivalent approved by the Engineer, shall be used for all lift operations. Picking points for the superstructure portion of span type OSS shall be made at the panel points that are closest to the third points of the span, in order to ensure that no members are overstressed during lift operations. Two picking points, one at each end, shall be used for the superstructure portion of cantilever OSS. Picking shall be made by wrapping the entire cross section of the structure. When alternate pick points are used, supporting calculations shall be submitted in a ccordance with §107 -05P.5. Lift Operations . However, lifting by chains or by individual members shall not be permitted.
D.Field Inspection. All sign structures shall be visibly inspected, and components shall be clean prior to erection. Damage that is attributable to the Contractor's operations shall be cause for rejection. Damage includes, but is not limited to, bends, kinks, dents, crac ks and pits. Rejected structures, or components, shall be removed from the work site and repaired, or replaced as required by the DCES All work relating to the repair or replacement, of defective structures, or components, shall be done at no additional cost to the State.
E.Anchor Bolts. The following procedure shall be used for placing and tightening anchor bolts:
1.Anchor bolts shall be carefully set to the proper location, alignment, and elevation by using templates. Templates shall be as detailed in the contract documents, and shall be used at both the top and bottom of the anchor bolt pattern. Bottom templates shall be cast into the footing. Top templates shall be placed near the top of the anchor bolts so as not to interfere with concrete operations, and shall be left in place for 24 hours after concrete placement. Undamaged top templates may be reused.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 2. Anchor bolts shall be set vertical, within 2.5%, and shall not be realigned by bending to fit the base plate. Anchor bolts that do not fit the base plate, or anchor bolts that are more than 2.5% out of plumb, shall be rejected. The Contractor may propos e a remediation method for rejected anchor bolts, subject to the approval of the Engineer. Rejected anchor bolts, and the concrete they are embedded in shall be replaced by new materials at no cost to the State.
3.The exposed portion of the anchor bolts shall be cleaned with a wire brush. The leveling nuts and washers under the base plate shall be threaded onto the anchor bolts, leaving a gap between the top of concrete and the bottom of the leveling nuts of no m ore than one anchor bolt diameter, and no less than 3/8 inch.
4.The post(s) alone, without the arms attached, shall be placed on the leveled anchor bolts and washers. Posts shall not be raked back to account for camber. The base plate shall bear directly and evenly on the washers and leveling nuts.
5.Beeswax, or the equivalent, shall be applied to the bearing face and the threads inside the top nut. The top anchor bolt nuts and washers shall then be placed and tightened by hand. All cleaning and lubricating shall be done immediately prior to nut pla cement and tightening. Top nuts and leveling nuts shall be checked for full bearing against the base plate, and any loose nuts shall be tightened by hand. The top nuts shall then be snug tightened using 20 - 30% of the torque values listed in Table 644 -1. The snugging sequence shall be as shown in Figure 644 -2. The leveling nuts shall then be similarly checked for snug tightness, using 20 - 30% of the values listed in Table 644 -1.
6.Fully tighten all top nuts according to the torques listed in Table 644 -1. The tightening sequence shall be as shown in Figure 644 -2. There shall be no rotation of the leveling nut during this procedure.
7.An additional nut shall be installed and tightened against the top nut to lock the installation. This lock nut shall be prepared and tightened as defined in 5.) and 6.) above. There shall be no rotation of the lower top nut during this procedure. TABLE 644 -1 Anchor Bolt Size (English) Required Torque (±5%) (ft -lbs) 1 ½ 650 1 ¾ 1,000 2 1,500 2 ¼ 2,200 2 ½ 3,000
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 FIGURE 644 -2
F.Bolting. Bolted steel connections shall be made with bolts, nuts and washers meeting the material requirements of §715 -14, High Strength Bolts, Nuts and Washers, and the galvanizing requirements of §719 -01, Galvanized Coatings and Repair Methods. Each bolt shall be furnished with a galvanized flat washer installed under the turned element. All connections shall be made by first tightening all nuts and bolts sufficiently to bring all components into full contact with each other. Any gaps between the f aying surfaces after snug tightening that exceed 1/16 inch shall not be considered in full contact and shall be cause for rejection. The Contractor may propose remediation measures subject to approval by the DCES. Rejected components shall be replaced o r repaired at no cost to the State. Bolts shall not be fully tightened before said tolerances are checked. After full contact has been achieved, all connections shall be brought to a condition beyond snug tight as required by Table 1001.3b of the New Yo rk State Steel Construction Manual. Fasteners shall be inspected after installation in accordance with Section 1001.4 of the New York State Steel Construction Manual.
G.Welding. Field welding shall not be permitted on any part of the structure, except as approved by the DCES.
H.Galvanized Metal Repair. The Contractor shall repair any damage to galvanized surfaces in conformance with the field repair requirements specified in §719 -01, Galvanized Coatings and Repair Methods, except that zinc paint applied by the spray method shall not be permitted.
644-4 Method of Measurement
644-4.01 Sign Structure. The work will be measured as the number of sign structures installed without
sign panels.
644-4.02 Drilled Shafts for Overhead Sign Structures. The payment quantity shall be the concrete
volume shown for the shaft in the table in the contract documents, multiplied by the number of drilled Anchor Bolt Star Pattern Tightening Sequence 6 Bolt Pattern 8 Bolt Pattern
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 shafts in the contract, unless the Engineer orders a modification to the details shown in the contract documents. If the Engineer orders a modification to the details shown in the contract documents, the payment quantity shall be the volume of concrete o rdered by the Engineer. If the Engineer orders a change from a drilled shaft to a rectangular footing, an order -on-contract shall be negotiated. No adjustment shall be made for the Contractor's election to use a rectangular footing, unless the Engineer orders a change to the details shown in the contract documents.
644-4.03 Rectangular Footing for Overhead Sign Structures. The payment quantity shall be the
concrete volume shown for the footing and pedestal in the table in the contract documents, multiplied by the number of footings in the contract, unless the Engineer orders a modification to the details shown in the contr act documents. If the Engineer orders a modification to the details shown in the contract documents, the payment quantity shall be the volume of concrete ordered by the Engineer. If the Engineer o rders a change from a rectangular footing to a drilled shaft, an order -on-contract shall be negotiated. No adjustment shall be made for the Contractor’s election to use a drilled shaft, unless the Engineer orders a change to the details shown in the contr act documents.
644-4.04 Anchor Bolts. The payment quantity shall be the mass shown in the anchor bolt table in the
contract documents times the number of bolts installed.
644-5 Basis of Payment
644-5.01 Sign Structure. The unit price bid for each structure for supporting sign panels shall be
compensation in full for fabricating, furnishing and erecting the structure complete as specified including upright support(s), span and/or cantilever arm or truss assemblies, diag onal bracing, all necessary hardware, nuts, bolts, and washers, and all other material, equipment and labor necessary to properly complete the work as shown in the contract documents and called for in the specifications. Footings a nd anchor bolts shall be paid for under separate items or will be furnished by others. The cost of all shop drawings, prints and reproducible prints required by the New York State Steel Construction Manual shall be included in the unit price bid for this item.
644-5.02 Foundations for Overhead Sign Structures. The unit price bid per cubic yard shall include
the excavation, any protective system(s) required to ensure the safety of the workers and the public, dewatering, backfill (select granular backfill or concrete), formwork, concrete, bar reinforcement for concrete, excavation and backfilling of test holes, conduit and fittings, restoration of surfaces in kind, disposal of excess excavated material, and saw cutting.
644-5.03 Anchor Bolts. The unit price bid pound shall include the furnishing and installing the anchor
bolts and all necessary hardware, including galvanizing, as shown in the contract documents and called for in the specifications. This includes the anchor bolts, all templat es used to ensure the proper alignment of the anchor bolt system, all nuts, and all washers necessary to complete the work as shown in the contract documents. Payment will be made under: Item No. Item Pay Unit 644.11 Anchor Bolts Pound 644.20 Drilled Shaft for Overhead Sign Structures Cubic Yard 644.30 Rectangular Footing for Overhead Sign Structures Cubic Yard 644.41xxyy Single Arm Cantilever Sign Structure Each 644.42xxyy Trussed Arm Cantilever Sign Structure Each 644.43xxyy Single Span Sign Structure Each 644.44nn Non-Standard Sign Structure Each NOTE:
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Section 600 STANDARD SPECIFICATIONS (USC) January 1, 202 4 VOLUME 3 1. xx, yy and nn denote serialized pay items. See §101 -02, Definition of Terms, under “Specifications”.
2.xx denotes span or arm length in yards. For Single Arm and Trussed Arm Cantilever Sign Structures, xx varies from 04 to 16 in whole number increments. For Single Span Sign Structures, xx varies from 15 to 65 in 5 yard increments.
3.yy denotes sign area in square yards. For Single Arm Cantilever Sign Structures, yy is 03, 05 or 08 square yards.. For Trussed Arm Cantilever Sign Structures, yy varies from 05 to 30 in 5 square yard increments. For Single Span Sign Structures , yy va ries from 30 to 90 in 30 square yard increments. SECTION 645 - SIGNS (Last Revised September 2021)
645-1 DESCRIPTION. This work shall consist of fabricating, installing and covering traffic sign
panels, sign support systems, sign posts, and illuminated sign panels in accordance with the contract documents, standard sheets, the MUTCD and as directed by the Engineer.
645-1.01 Definitions. The following definitions shall apply to all work equipment and materials included
under this section:
A.Sign Face - the side of a sign panel with reflective sheeting attached.
B.Sign Face Layout - a dimensional representation of the sheeting mounted on the sign panel.
C.Sign Panel - a uniform sheet of aluminum or fiberglass reinforced plastic with reflective sheeting mounted on it. It may be constructed with or without additional sheets of aluminum or fiberglass reinforced plastic attached on the larger sheet. Multiple sh eets of aluminum or fiberglass reinforced plastic may be used provided the sheets are of a uniform material and thickness and not separated.
D.Sign Panel Assembly - a group of contiguous sign panels with a maximum separation of 6 inches.
E.Sign Support System - the apparatus a sign panel is mounted.
645-2 Materials
645-2.01 General. Materials shall meet the requirements of the following subsections of Section 700
Materials and Manufacturing : Wood Preservative - Water Borne 708-31 Stress Graded Timber and Lumber 712-14 Stainless Steel Connecting Products 715-16 Rubber Impregnated Woven Cotton -Polyester Fabric 728-01 Rubber Impregnated Random Fiber Pad 728-02 Aluminum Sign Panels 730-01 Retro -Reflective Sign Sheeting 730-05 Stiffeners, Overhead Brackets, and Miscellaneous Hardware 730-22 Fiberglass Reinforced Plastic Sign Panels 730-23 Type A Sign Supports 730-24 Type B Sign Posts 730-25 Breakaway Bases and Hinge Assemblies 730-26 U-Bolts ASTM F1554, Grade 36
645-2.02 Sign Panels.
Source: New York Standard Specifications, 2024 Edition. Pages 688–697 of 1,264.