SECTION 716 - MISCELLANEOUS METALS
716.01 General. All miscellaneous metals shall be as shown on the plans or in the special
provisions, and shall conform to the requirements as set out in this subsection, unless otherwise specified. Unless waived by the Engineer, the Contractor shall furnish the State Materials Engineer three copies of certified test reports from an approved testing laboratory covering all material described in this section.
716.02 Steel Castings.
716.02.1 Carbon Steel Castings. Carbon steel castings shall conform to AASHTO M
103. Grade 70-36 shall be furnished unless otherwise specified.
716.02.2 Chromium Alloy-Steel Castings. Chromium alloy-steel castings shall conform
to ASTM A 743. Grade CA-15 shall be furnished unless otherwise specified.
716.03 Steel Forgings . Steel forgings shall conform to AASHTO M 102. Class C
forgings shall be furnished unless otherwise specified.
716.04 Gray Iron Castings. Gray iron castings shall conform to AASHTO M 105. Class
30B shall be furnished unless otherwise specified. For testing purposes a lot size shall be defined as the lesser of either a total of 35,000 pounds or one week's production for the Department. The test bar shall be made from a melt of iron used in production of units for the Department. The test bar length shall be a minimum of 16 inches.
716.05 Malleable Castings. Malleable castings shall conform to ASTM A 47. Grade
No. 35018 shall be furnished unless otherwise specified.
716.06 Bronze Castings and Bearings. Bronze castings and bearings shall conform to
AASHTO M 107. Alloy UNS No. C91100 shall be furnished unless otherwise shown on the plans.
716.07 Copper Bearings and Sheet Copper.
716.07.1 Rolled Copper-Alloy Bearings and Expansion Plates . Rolled copper-alloy
bearings and expansion plates shall conform to ASTM B 100. Alloy UNS No. C51000 shall be furnished unless otherwise specified.
716.07.2 Sheet Copper. Sheet copper shall meet the requirements of AASHTO M 138
including the embrittlement test. The Copper No. shall be as designated on the plans.
716.08 Self-Lubricating Bearing Plates . Self-lubricating bearing plates shall be an
article of standard production by an established manufacturer of such equipment. They shall be provided with trepanned or drilled recesses, not grooves, which shall be filled with a lubricating compound capable of withstanding the atmospheric elements and consisting of graphite and metallic substances with a lubricating binder. This compound shall be pressed into the recesses by hydraulic presses so as to form dense nonplastic lubricating inserts. The lubricating area shall comprise not less than 25% nor more than 35% of the total bearing area. Contractor shall furnish a dditional lubricating material in stick form. Just prior to erecting the members that rest on the bronze plates, the Contractor shall thoroughly rub the steel bearing plates that re st on the bronze with the lubricant. These surfaces shall be unpainted and shall be cleaned with a steel brush immediately before the lubricant is applied. The bearing plates shall be made of (1) rolled bronze conforming to the requirements of Subsection 716.07.1, or (2) cast bronze conforming to requirements of Subsection 716.06, Alloy UNS No. C91100 or No. C90500, except that a maximum lead content of 2.5% is allowable. The coefficient of friction shall not exceed 0.10 when subjected to design loading and also when subjected to twice the design loading. Contact surfaces shall be finished in the direction of motion in accordance with the requirements of ANSI B46 1-55 No. 125. All machined surfaces shall be flat within 0.0005 inch per inch of length and width. In ma ting curved surfaces of steel and bronze, the concave surfaces may have a plus tolerance of 0.01 inch and the convex surfaces may have a minus tolerance of 0.01 inch. The Contractor shall furnish the manufacturer's shop drawings showing pattern and size of recesses.
716.09 Babbitt. Babbitt shall conform to ASTM B 23. The alloy number shall be as
designated on the plans.
716.10 Lead Plates, Pipes, Etc. Lead used for plates, pipes, etc. shall conform to ASTM
B 29, Grade: Pure Lead.
716.11 Galvanized Pipe. Galvanized pipe for water, gas, etc. shall conform to ASTM A
53.
716.12 Rolled Zinc. Rolled zinc shall conform to ASTM B 69. The type shall be as
designated on the plans.
716.13 Blank.
716.14 Bar Grates.
716.14.1 Material Requirements. Plain round steel bars and strap bars shall conform to
the following requirements: B-9 Grates and Bar Grates ................. AASHTO M 270, Grade 36
Miscellaneous Metals in other states
Get an email when 716 changes
Mississippi revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.