gmoney731
Structural
- Oct 24, 2018
- 32
Hello,
We specified 0.25" thick washers to be used for a fastening application. We are fastening the flange of a HDPE pipe to concrete.
However, the contractor stated those washers won't be available to be bought until April.
The question from the contractor is whether he can stack (4) 1/16" thick washers together to create a combined thickness of 0.25".
My answer here would be yes, they can stack (4) washers together to create the 0.25” thickness. I don’t think the stack is too large (I found online that if you’re going to stack, the “thickness” of the washer stack – 0.25” - needs to be less than the diameter of the washer used – 2”). Since we meet this guidance, we are good.
I know AISC is only for steel connections, but there is some guidance in there that mentions that you cannot stack washers together for a combined thickness of 5/16” or larger for slotted or oversized holes only.
I don’t see any guidance aside from that.
Any advice would be appreciated.
We specified 0.25" thick washers to be used for a fastening application. We are fastening the flange of a HDPE pipe to concrete.
However, the contractor stated those washers won't be available to be bought until April.
The question from the contractor is whether he can stack (4) 1/16" thick washers together to create a combined thickness of 0.25".
My answer here would be yes, they can stack (4) washers together to create the 0.25” thickness. I don’t think the stack is too large (I found online that if you’re going to stack, the “thickness” of the washer stack – 0.25” - needs to be less than the diameter of the washer used – 2”). Since we meet this guidance, we are good.
I know AISC is only for steel connections, but there is some guidance in there that mentions that you cannot stack washers together for a combined thickness of 5/16” or larger for slotted or oversized holes only.
I don’t see any guidance aside from that.
Any advice would be appreciated.