7-59 Sectio N 714 – Structura L Steel
714.0 1 GENERA L REQUIREMENTS . Structural steel and other related materials shall conform to the requirements specified in this section . All main load carrying members and components of rolled or welded sections subject to tensile stress or the reversal of stresses, as well as any oth er members or components identified in the Contract as requiring CVN testing, shall meet the longitudinal Charpy V - notch impact requirements specified in AASHTO M 270 for non -fracture critical steel and fracture critical steel, for Zone 2. Impact test sampling and testing procedures shall be in accordance with AASHTO T 243 . All steel bolts, nuts, and washers furnished for Agency project s shall be manufactured in the United States only. All bolts, nuts, and washers furnished for a particular applica tion shall be furnished by a single supplier. All bolts, nuts, and washers shall have identifiable manufacturer’s markings on each piece. Nuts for galvanized fasteners shall be over -tapped a minimum amount to ensure fastener assembly. All galvanized nuts shall be lubricated with a lubricant containing a visible dye that will provide visual verification of the lubricant during installation. Black bolts shall be oily to the touch when installed. Bolts and nuts not properly lubricated shal l be cleaned and re -lubricated prior to installation. 714.0 2 STRUCTURA L STEEL . Structural carbon steel shall conform to the requirements of AASHTO M 270, Grade 36. 714.0 3 HIGH-STRENGT H LOW-ALLO Y STRUCTURA L STEEL . High -strength low -alloy structural steel with a 50 ksi minimum yield point up to 4 inches in thickness shall conform to the requirements of AASHTO M 270, Grade 50 or Grade 50W as required. 714.0 4 CARBO N STEEL BOLTS , NUTS , AND WASHERS . Carbon steel bolts shall conform to the requirements of ASTM A307, Grade A. Carbon steel nuts shall conform to the requirements of ASTM A563 . Carbon steel washers shall conform to the requirements of ASTM F844 . 714.0 5 HIGH-STRENGT H STRUCTURAL BOLTS AND ASSEMBLIES, 120 KSI. High -strength bolts shall meet the requirements of ASTM F3125, Grade A325, including rotational capacity testing, for each lot of fasteners. Heavy hex nuts shall conform to the requirements of ASTM A563 , Grade DH. Hardened steel washers shall conform to the requirements of ASTM F436 . Bolts installed in coated structural components shall be Type 1 and shall be provided with appropriate nuts and washers, as required. The combination of bolt, nut, and washer shall be mechanically galvanized in accordance with ASTM B695 , Class 55, Type 1. Bolts installed in uncoat ed weathering steel structural components shall be Type 3 and shall be provided with appropriate nuts and washers, as required.
7-60 714.0 6 HIGH -STRENGTH STRUCTURAL BOLTS AND ASSEMBLIES, 150 KSI. High -strength bolts
shall meet the requirements of ASTM F3125, Grade A490, including rotational capacity testing, for each lot of fasteners . Heavy hex nuts shall conform to the requirements of ASTM A563 , Grade DH. Hardened steel washers shall conform to the requirements of ASTM F436 . Bolts installed in coated structural components shall be Type 1 and shall be provided with appropriate nuts and washers, as required. The combination of bolt, nut, and washer shall be mechanically galvanized in accordance with the requirements of ASTM B695 , Class 55, Type 1. Bolts installed in uncoated weathering steel structural components shall be Type 3 and shall be provided with appropriate nuts and washers, as required. 714.0 7 ANCHO R BOLT S FOR BRIDG E RAILING . Bridge railing anchor bolts shall conform to the requirements of ASTM A449, Type 1. Bridge railing nuts shall conform to the requirements of ASTM A563 , Grade DH . Bridge railing washers shall conform to the requirements of ASTM F436 . 714.0 8 ANCHO R BOLT S FOR BEARIN G DEVICES . Anchor bolts for bearing device s shall conform to the requirements of ASTM F1554, Grade 36, unless otherwise specified. Nuts for bearing devices shall be of the heavy hex type and conform to the requirements of ASTM A563 . Washers for bearing devices shall conform to the requirements of ASTM F436 and the style shall be extra thick washer , unless otherwise noted on the Plans. When the bolts furnished under this subsection are required to be galvanized, the bolts, nuts, and washers furnished shall meet the requirements of ASTM B695, Class 55 for mechanically galvanized fasteners or ASTM F2329 for hot -dipped galvanized fasteners . Anchor bolts sh all be swedged or threaded and shall conform to the shape, length, and diameter specified in the Contract. 714.09 ANCHO R BOLT S FOR SIGNALS , LIGHTING , AND OVERHEA D SIGNS. Anchor bolts for traffic signals, lighting, and overhead sign structures shall conform to the requirements of ASTM F1554, Grade 55, unless otherwise specified. Nuts shall be heavy hex type and conform to the requirements of ASTM A563 , Grade DH. Washers shal l conform to the requirements of ASTM F436 and the style shall be extra thick washer, unless otherwise indicated on the Plans. All components shall be galvanized in accordance with ASTM F2329 . Anchor bolts shall be swedged or threaded unless otherwise specified on the Plans. 714.1 0 WELDE D STUD SHEA R CONNECTORS . Welded stud shear connectors shall conform to the requirements of the AASHTO LRFD Bridge Construction Specifications and ANSI/ AASHTO/AWS D1.5 .
7-61 714.1 1 STEEL TUBING . Steel tubing shall conform to the requirements of ASTM A500, Grade B, unless
otherwise specified. 714.1 2 DIREC T TENSIO N INDICATORS . Direct tension indicators (DTIs) shall be compressible - washer -type direct tension indicators conforming to the requirements of ASTM F959 . DTIs shall be of the type corresponding to the bolt specification with which they will be used. 714.1 3 TENSIO N CONTRO L ASSEMBLIES . Tension control assemblies shall be twist off type tension control structural bolt/nut/washer assemblies conforming to ASTM F3125 , Grade F1852 or Grade F2280. Heavy hex nuts shall conform to the requirements of ASTM A563 , Grade DH. Hardened steel washers shall conform to the requirements of ASTM F436 . Bolts installed in coated structural components shall be Type 1 and shall be provided with appropriate nuts and washers, as required. The combination of bolt, nut, and washe r shall be mechanically galvanized in accordance with the requirements of ASTM B695 , Class 55, Type 1. Bolts installed in uncoated weathering steel structural components shall be Type 3 and shall be provided with appropriate nuts and washers, as required.
7-62 Section 715 – Miscellaneous Metals
715.01 IRON CASTINGS . Iron castings shall meet the following requirements:
a.General Requirements . Castings shall conform to the requirements of AASHTO M 306 . Castings shall be true to pattern in form and dimensions, free from pouring faults, sponginess, cracks, blow holes, and other defects in positions affecting their strength and value for the serv ice intended. Castings shall be boldly filleted at angles and the arises shall be sharp and perfect. The surfaces shall have a blemish -free finish. All castings shall be blast -cleaned or otherwise effectively cleaned of scale and sand to present a smooth, clean, and uniform surface. The dimensions of the frames and covers shall substantially conform to the dimensions for cast iron covers and frames as shown in the Contract. The covers shall be flush with the upper surface of the frame when seated. The seati ngs shall be machined or made quiet using a gasket cushioning insert or supported by a three -point triangular suspension. The minimum depth of insertion of the cover into the frame shall be no less than 2 inches. As a minimum, the covers and frames shall m eet the HS-20 loading requirements of AASHTO and the proof load requirements of AASHTO M 306 . Covers shall be identified by the words “STORM SEWER,” “WATER,” “SEWER,” “ELECTRIC,” or others as applicable, in raised cast letters as indicated in the Contract or as directed by the Engineer.
b.Gray Iron Castings . Gray iron castings shall conform to the requirements of AASHTO M 105, Class No. 35B, unless otherwise specified.
c.Ductile Iron Castings . Ductile iron castings for frames and covers shall conform to the requirements of ASTM A536, Grade 80 -55-06. 715.02 ALUMINUM ALLOY . Aluminum alloy material shall be fabricated from Alloy 6061 -T6.
a.Sheet and Plate . Sheet and plate shall be in accordance with ASTM B209 .
b.Drawn Seamless Tubes . Drawn seamless tubes shall be in accordance with ASTM B210 .
c.Bars, Rods, and Wire . Bars, rods, and wire shall be in accordance with ASTM B211 .
Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 1211–1213 of 1,380.