7-45 Testing shall be in accordance with methods specified in AASHTO M 20. Whenever possible in the manufacture of the units, a minimum f orming radius of 1 inch is to be maintained. All units that are formed with less than 1 inch radius shall be hot- dipped galvanized after forming. Bolts shall conform to the requirements of ASTM F 568 Class 4. 6 (ASTM A_307) and galvanized in accordance with AASHTO M 232.
713.08 Steel Extrusions Material for steel extrusions for exp ansion devices shall be
ASTM A 36/A 36M, ASTM A 588/A 588M, or ASTM A 242/A 242M, excep t that ASTM A 242/A 242M shall not be used for e xtrusions that are to be we lded. SECTION 714 - JOINT SEALS
714.01 Elastomer for Seal Elements The preformed elastomeric polychloroprene
joint seal elements, both compression and gland type, shall con form to the requirements of AASHTO M 297.
714.02 Fabric for Seal Elements Fabric used for reinforcement in a seal element
shall be a non-wicking fabric c onforming to the requirement of ASTM D 578.
714.03 Lubricant Adhesive The lubricant-adhesive shall be a 1 part, moisture
curing, polyurethane and aromatic hydrocarbon solvent mixture a nd shall have the following physical properties: Solids content 60-80 percent by weight Service Range 5°F to 120°F minimum Film Strength (ASTM D 412) 1,200 psi minimum Elongation at Break 250 percent minimum Each lot of lubricant-adhesive shall be delivered in sealed co ntainers plainly marked with the manufacturer's name or trademark and the date of manuf acture. Maximum shelf life shall not exceed 6 months.
714.04 Sealant The sealant shall be a one part, moisture curin g, polyurethane base, non-
sag, elastomeric product, conformi ng to the requirements of Fed eral Specification TT-S- 0023OC(2), Type II, Class A or A STM C920, Type S, Grade NS, Cla ss 25. Each lot of sealant shall be delivered in sealed containers pl ainly marked with the manufacturer's name or trademark and the date of manufacture. Maximum shelf life shall be as recommended by the manufacturer. 7-46
714.05 Compression Seals Compression seals shall be multi-cha nnel extruded
shapes made of material conforming to the requirements of Secti on 714.01 - Elastomer for Seal Elements, and in a configuration as determined by each par ticular manufacturer and as shown in the contract documents. The seal shall be marked on t he top surface with the manufacturer's name or trademark, the lot number and the size d esignation at intervals of 5 feet or less. Actual seal dime nsions shall not differ from the nominal dimensions by more than 1/16 inch/inch of depth or width, or a maximum of ¼ inch whichever is less. The material used shall be one of the products listed on the M aine Department of Transportation’s Qualified Products List.
714.06 Gland Type Seals Gland type seals shall be single memb rane extruded or
molded shapes, made of material conforming to the requirements of Section 714.01 - Elastomer for Seal Elements and of a configuration as determine d by each manufacturer and as shown in the contract documents. The seals shall be marked on the top surface with the manufacturer's name or trademark, the lot number and the size d esignation at intervals of 5 feet or less. If fabric is used to reinforce the seal, it shal l conform to the requirements of The material used shall be one of the products listed on the M aine Department of Transportation’s Qualified Products List. SECTION 715 - LIGHTING MATERIAL
715.02 Steel Conduit Galvanized steel conduit shall be of uni form thickness with
scale-free, smooth circular bore to permit cutting of clean, tr ue threads. Steel conduit and couplings shall be Schedule 40 galvanized st eel pipe conforming to the requirements of ASTM A 53. Threaded couplings shall be conduit type permitting the end of conduits to fully abut each other squarely within the co upling. Other fittings for metal conduit, exclusive of bushings shall be threaded malleabl e iron conforming to the requirements of ASTM A 338 and shall be galvanized in accordanc e with the requirements of AASHTO M 232. All bushings shall be threaded, insulated grounding type. 715.03 Non-Metallic Conduit Non-metallic conduit shall be rig id unplasticized polyvinylchloride conduit, suitable for Type II or Type III ins tallations, whichever is required and shall conform to the standards of the NEMA or the UL.
715.04 Prewired Conduit Prewired conduit will no longer be ac cepted
715.07 Secondary Wiring Secondary wiring cables, including ne utrals and
grounding conductors, shall be 600 volt cables and shall consis t of single conductor, stranded, soft-drawn or annealed c opper wire, insulated with fl ame retardant, moisture and