I have a deck assembly comprised of a steel plate, a layer of plywood with a rubber sheet about .10" (2.5 mm) thick glued to the wood and a steel trim piece on top of the rubber. A bolt running through the entire thickness of the deck holds the trim.
The problem is that when the bolt is tightened it will cause the adhesive between the wood and rubber to eventually let go and the rubber raises up to form a bubble around the trim.
We started using a sleeve to hold a certain thickness to the assembly but the design method has been SWAG (scientific wild ass guess).
Has anyone encountered some guidelines for determining how much compression (% of thickness, psi, other?)a layer of rubber will tolerate before it starts to creep?
The problem is that when the bolt is tightened it will cause the adhesive between the wood and rubber to eventually let go and the rubber raises up to form a bubble around the trim.
We started using a sleeve to hold a certain thickness to the assembly but the design method has been SWAG (scientific wild ass guess).
Has anyone encountered some guidelines for determining how much compression (% of thickness, psi, other?)a layer of rubber will tolerate before it starts to creep?
