I am trying to determine the number of layers of woven and roving Fibreglass to layup
to support a windlass
that is being installed into my anchor locker
on a shelf.
Perhaps you can provide some direction for me please?
Here is the plan:
- The motor will be enclosed on three sides and the bottom with a single sheet of plywood (each)
- The back side will remain open to maintain access to the motor
- The plywood will be sealed in epoxy to prevent water intrusion
- The structure will be fibreglassed using West Systems epoxy to the floor of the anchor locker and to the underside of the deck on one side
- The anchor locker floor is composed of roughly 1/4" of GRP over plywood
- The deck consists of GRP and balsa core and at the point of contact is about 6" from the gunwale
I have determined that GRP
has a tensile strength of 300MN/M2 but I don't know how to translate that into the number of layers that I need to layup
. I figure I need to target the maximum pull of the windlass at 2200lb.
To help with visualization, I have sketched in the proposed mount into a picture of the locker and also with the final product will hopefully look like.
BTW, the locker cover will be cut in half with the forward section being semi-permanently affixed.
Thanks for any guidance you can provide.