This is my first post on the site. I come with questions, since I'm not a fantastic wood worker. I tend to split the wood a lot out of stupidity.
Anyway, I am currently building a 45' catamaran out of fiberglass and foam. Yes, I know... a sin.
I need to rig up a pair of wooden hoist that looks like this:
I'm at a point right now where I'm familiar with scarf joints, gussets and the Warren Truss, but I want to do this in an easy manner. Do I use pairs (or triples) of 2x10's? Plywood with a Warren Truss? 4x4's?
I am lifting hulls that weigh 500lbs initially, then 1500lbs max (when they are finished). This weight would be on two of these hoists, evenly balanced using lifting straps (the yellow in the picture). There are two known lifting points for the hull and I'd have one of these at each lift point.
Basically, I'm trying to figure out the following:
1) What is the strongest design for a loaded 90 degree joint?
2) What is the appropriate material for holding the weight of the hull for all three parts? Upright? Legs? Load Beam? What are the scantlings on the wood?
3) How should I attach things? Lags? Many drywall screws? I will certainly glue every single attachment in addition to mechanical fasteners.
Any tips? Tricks?
Thanks in advance.