Lock Washers
Lock Washers
(OP)
During a random inspection I notice a GC had installed lock washers between the nut and hardened washer on a A325 3/4" bolt used to support a steel frame platform.
AISC does not allow the use of this non-ASTM lock washer right? I know the hardened washer is recommended for this purpose alone but why would a GC install a lock washer?
AISC does not allow the use of this non-ASTM lock washer right? I know the hardened washer is recommended for this purpose alone but why would a GC install a lock washer?






RE: Lock Washers
RE: Lock Washers
The reason is simple, high strength bolts when turning will "chew" up the softer structural steel!
Good luck
RE: Lock Washers
RE: Lock Washers
Rod
RE: Lock Washers
Ron put it in a nutshell, lockwasher not allowed. Better use an "ANCO" locknut.