ASTM A-7 grade?
ASTM A-7 grade?
(OP)
Anyone know the equivalent grade of A-7 steel? 33 ksi steel seems to be the best guess but I can never understand why they didn't associate a grade with this steel back in the day.
Bridge was built in 1952....
Bridge was built in 1952....






RE: ASTM A-7 grade?
RE: ASTM A-7 grade?
Yield, Fy = 33 ksi
allowable tension in net area, no voids - 20 ksi
allowable shear on web area (d x t) - 13 ksi
allowable bending on symmetrical compact section - 22 ksi +
allowable bending on unsymmetrical shapes - 20 ksi
allowable bearing on milled surfaces - 30 ksi
allowable bearing on bolts & rivets, net area - 45 ksi
welding electrode specified - E60 & E70
www.PeirceEngineering.com
RE: ASTM A-7 grade?