Plate washers on base plates
Plate washers on base plates
(OP)
Recently, I went on a site inspection and saw plate washers instead of regular round washers on the base plates.
Is it common to have plate washer(3"x3"x5/8" thick) on top of base plate? Does it make any difference structurally?
The only reason I can think of is to cover up the oversized holes of the base plate.
At one location, the contractor had put 5 plies of plate washer. This location had a X-bracing also.
thanks
Is it common to have plate washer(3"x3"x5/8" thick) on top of base plate? Does it make any difference structurally?
The only reason I can think of is to cover up the oversized holes of the base plate.
At one location, the contractor had put 5 plies of plate washer. This location had a X-bracing also.
thanks






RE: Plate washers on base plates
RE: Plate washers on base plates
I like welding the washer plate to the base plate, both for load transfer and corrosion protection. I also like to put a normal round washer on top. I am no expert, but as far as I understand it, the function of the washer is to aid tightening and ensure a correct load transfer, those functions are still required even after putting a plate washer.
RE: Plate washers on base plates
RE: Plate washers on base plates
RE: Plate washers on base plates
(5) - 5/8" thick washers is quite excessive IMHO. Did they set the anchor bolts to high? and they can't get the nut down becasue they ran out of threads?
RE: Plate washers on base plates
The AISC 13th ed. manual provides maximum hole size dimensions and corresponding washer dimensions and thicknesses in Table 14-2. Typically 1/3 times the diameter of the anchor rod is used for the baseplate thickness - so for a 1 1/2" anchor rod a 1/2" thick washer should be used.
RE: Plate washers on base plates
RE: Plate washers on base plates