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710.08 Guardrail Hardware Guardrail hardware shall conform to the applicable
standards contained in the lat est ARTBA Bulletin No. 268B, "A G uide to Standardized Highway Barrier Rail Hardware ", approved by the AASHTO-ARTBA-AG C Joint Cooperative Committee, Technical Bulletin Number 268-B. All galvanized fittings, bolts, washers, and other accessories shall be in accordance with the requirements of AASHTO M 111, M 232 or AASHTO M 298, C lass 50, Type I, whichever applies. All galvanizing shall be done after fabricat ion. Hardware for corrosion resistant guardrail shall be in accorda nce with ASTM A 325M/A 325, Type 3, except the 16 inch bolts and nuts for attac hing the metal beam rail to the posts, which may be galvanized as specified above. SECTION 711 - MISCELLANEOUS BRIDGE MATERIAL
711.01 Steel Pipe Piles, Splices and Tips Steel pipe piles sha ll conform to the
requirements of ASTM A 252. The steel pipe piles shall be Grade 3, Fy = 45 ksi, with either straight or spiral butt-welded seams. Lap welded seams are not acceptable. The steel shall be a Prequalified Base Metal from the AWS D1.1 Structural Welding Code - Steel. Cast steel points , splices and open end cutting shoes shall co nform to the requirements of ASTM A 27 Grade 65/35 or AST M A 148 Grade 90/60. Pipe pile s plice backup ring material shall be any steel listed in AWS Structural Steel Weld ing Code D1.1, Table 3.1, with the exception of 100 ksi minimum yield strength steels
711.02 Gabions Each shipment of gabions to a job site shall be accompanied by a
certificate that states that the material conforms to the requi rements of this specification. The certificate shall be on manufacturer's letterhead and shall be signed by an officer of the company having legal authority to bind the company. Mesh openings shall be hexagonal in shape, measuring approxima tely 3 inches by 4 inches and shall be uniform in size. Double twist mesh joints shall be flexible with each pair of wires twisted three half turns, commonly called triple twisted, to prevent unraveling. Steel wire and galvanizing shall meet the requirements of ASTM A 641M/A 641 and ASTM A 90, shall have a Class 3 coating, and shall be soft temper. The wire mesh shall have a sufficient elasticity to permit elongation of the mesh equivale nt to a minimum of 10 percent of its length.
a.Galvanized Gabions without P olyvinylchloride Coating The di ameter of the steel wire mesh shall be 0.1181 inches after galvanizing. The diamet er of the selvedge wire, running through all the edges (perimeter wire), shall be 0.1535 inches after galvanizing. The diameter of the wire for assembling and lacin g the gabion units shall be 0.0866 inches after galvanizing. The above wire sizes shall have a tolerance of +/- 2.5 percent. 7-26
b.Polyvinylchloride (PVC) Coate d Gabions When specified on th e plans, all galvanized steel wire shall be coated with a minimum of 0.015 inches of gr ay or green PVC, which shall be suitable to resist the destructive effects of im mersion in acidic, salt, or polluted water, exposure to ultra violet light and abrasion and retain these characteristics after a period of not less than 3,000 hours whe n tested in accordance with ASTM A975. The diameter of the steel wire mesh shall be 0 .1063 inches after galvanization and 0.1363 inches overall, core wire plus PVC coa ting. The diameter of the selvedge wire running through all the edges (perimeter wire) shall be 0.1338 inches after galvanizing and 0.1638 inches overall, c ore wire plus PVC coating. The diameter of the wire for assembling and lacing th e gabion units shall be 0.0866 inches after galvanizing and 0.1166 inches overall, core wire plus PVC coating. All wire sizes shall have a tolerance of +/- 2.5 percent, the t hickness of the PVC excluded. The mesh shall be capable of withstanding the test described b elow: An uncut section of mesh 6 feet long and of a minimum width of 3 feet, including all selvedge bindings, shall have the ends securely clamped for 3 f eet along the width of the sample. When the width of the section under test exceeds 3 fee t, the clamps shall be placed in the middle portion of the wid th and the excess width shall b e allowed to fall free on each side of the clamped section. The sample shall then be subjecte d to sufficient tension to cause 10 percent elongation of the sample section between clamp s. After elongation and while clamped as described above (and otherwise unsupported), t he section shall be subjected to a load applied to a n area of 1 ft² located approxi mately in the center of the sample section between the clamps and in a direction perpendicu lar to the direction of the tensile force. The sample shall withstand without rupture of a ny wire or opening of any mesh fastening, an actual load, so applied, equaling or exceedi ng 6,000 pounds. The ram head used in the test shall be circular with its edges beveled or rounded to prevent cutting the wires.
711.03 Stones for Gabions Stones to fill gabions shall be of clean, hard, and durable
rock with a minimum dimension of 4 inches in all directions and a maximum dimension of 12 inches. Stones to fill hand filled gabions shall be of clean, hard, du rable, crushed ledge or quarried rock with a minimum dimension of 4 inches in all direc tions and a maximum of 12 inches.
711.04 Bridge Drains Bridge drains shall be fabricated in con formance with the
details shown in the Contract documents, and to the requirement s of Section 504 - Structural Steel. All bridge drain parts sh all be hot-dip galvanized in a ccordance with the requirements ofSection 506, Shop Applied Protective Coating-Steel.
711.06 Stud Shear Connectors, Anchors and Fasteners Shear con nectors shall meet
the dimensional tolerances of F igure 7.1 of the ANSI/AASHTO/AWS D1.5 Bridge Welding 7-27 Code (D1.5 Code). Shear connectors, anchors and fasteners shal l meet the material requirements of Section 7 of the D1.5 Code. Shear connectors s hall meet the mechanical property requirements of Table 7.1, Type B of the D1.5 Code. A nchors and fasteners shall meet the mechanical property requirements of Table 7.1 of the D 1.5 Code, Type A.
711.07 Mattresses Each shipment of mattresses on a job site sh all be accompanied by a
certificate that states that the material conforms to the requi rements of this specification. The certificate shall be on the manufacturer's letterhead and s hall be signed by an officer of the company having legal authority to bind the company. Mesh openings shall be hexagonal in shape, measuring approxima tely 2½ by 3¼ inches and shall be uniform in size. Double twist mesh joints shall be flexible with each pair of wires twisted three half turns (triple twisted) to prev ent unraveling. Steel wire and galvanizing shall meet the requirements of ASTM A 641M/A 641 an d ASTM A 90, shall have a Class 3 coating, and shall be soft temper. The wire mes h shall have a sufficient elasticity to permit elongation of the mesh equivalent to a min imum of 10 percent of its length ±.
a.Galvanized Mattresses without Polyvinylchloride Coating The diameter of the steel wire mesh shall be 0.0866 inches after galvanizing. The diamet er of the selvedge wire, running through all the edges (perimeter wire), shall be 0.1063 inches after galvanizing. The diameter of the wire for assembling and lacin g the units shall be 0.0866 inches after galvanizing. The above wire sizes shall ha ve a tolerance of ±2.5 percent.
b.Polyvinylchloride (PVC) Coated Mattresses When specified on the plans, all galvanized steel wire shall be coated with a minimum thickness of 0.015 inches of gray or green PVC, which shall be suitable to resist the destru ctive effects of immersion in acidic, salt or polluted water, exposure to ultra violet light and abrasion and retain these characteristics after a period of not less tha n 3,000 hours when tested in accordance with ASTM A975 The diameter of the steel wire me sh shall be 0.0866 inches after galvanization and 0.1166 inches overall minimum, c ore wire plus PVC Coating. The diameter of the selvedge wire running through all the edges (perimeter wire) shall be 0.1050 inches after galvanizing and an overall minimum diame ter of 0.1350 inches, core wire plus PVC coating. The diameter of the wire f or assembling and lacing the units shall be 0.0866 inches after galvanizing and 0 .1166 inches nominal overall, core wire plus PVC coating. All wire sizes shall have a tolerance of ±2.5 percent, the thickness of the PVC excluded. The mesh shall be capable of withstanding the test described b elow: An uncut section of mesh 6 feet long and a minimum width of 3 f eet, including all selvedge bindings, shall have the ends securely clamped for 3 f eet along the width of the sample. When the width of the section under test exceeds 3 fee t, the clamps shall be placed 7-28 in the middle portion of the wid th and the excess width shall b e allowed to fall free on each side of the clamped section. The sample shall then be subjecte d to sufficient tension to cause 10 percent elongation of the sample section between clamp s. After elongation and while clamped as described above (and otherwise unsupported), t he section shall be subjected to a load applied to a n area of 1 ft² located approxi mately in the center of the sample section between the clamps and in a direction perpendicu lar to the direction of the tensile force. The sample shall be able to withstand without r upture of any wire or opening of any mesh fastening, an actual load, so applied, equaling or exceeding 6,000 pounds. The ram head used in test shall be circular with its edges beveled or rounded to prevent cutting the wires.
711.08 Stones for Mattresses Stones to fill mattresses shall b e of clean, hard, and
durable rock with a minimum dimension of 3 inches in all direct ions and a maximum dimension of 6 inches.
711.09 Neoprene Pads The neoprene shall be either chloropren e or natural
polyisoprene of 50 +/-5 Shore A durometer hardness and shall co nform to the requirements of Sections 18.10.2 of AASHTO LRFD Bridge Construction Specific ations, where applicable.
711.10 H-Beam Piles, Splices and Tips Steel H-beam piles sha ll be ASTM A 572,
Grade 50 minimum. Steel H-beam pile splicers shall be ASTM A 572, Grade 50 minimu m. H-Beam pile tips shall consist of pile points equipped with cut ting teeth. The slope forming the point shall not be steeper than 1¾ : 1. Material f or H-Beam pile tips shall consist of plain cast steel pile points conforming to the requi rements of AASHTO M 103 (ASTM A 27), Grade 65/35 or ASTM A 148, Grade 80/50. The use o f pile tips fabricated by welding sections of plate in a n "H" configuration will not b e allowed.
711.11 Elastomer Elastomer for bearings shall conform to AASHT O LRFD Bridge
Construction Specification Section 18.2.3 except that the elast omer compound shall be Grade 3 or 4 or 5, unless otherwise noted on the Plans. A highe r grade of elastomer may be substituted for a lower one.
711.12 Stainless Steel Stainless steel shall conform to the r equirements of ASTM A
167 Type 308 or ASTM A 240, Type 304.
711.13 Polytetrafluoroethylene (PTFE) The PTFE, filled or unf illed, shall conform
to the requirements of Secti on 18.8 of AASHTO, LRFD Bridge Cons truction Specifications. PTFE resin shall conform to the requirements of ASTM D 4894 or D 4895. SECTION 712 - MISCELLANEOUS HIGHWAY MATERIAL
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 730–733 of 817.