From time to time we get a question in the comments, or via email, asking us to opine on whether a planned modification to a boat or rig will be strong enough.
Let's take a look at a typical example that just came in:
Member Denny asked:
I am building a hard dodger for an O’Day 35, I want to move the traveler from the deck forward of the companionway to the aft end of the dodger–out of the way.
The main arch at the very rear which will be the load bearing part, has a base (entire top ) of 1/2″ cell modulus (NICORE) with one layer of fiberglass matting on the bottom and three on top, laminated. In addition, across the top inside will be two beams two feet apart and 65″ wide made of six 2″ strips of 1/4″ plywood laminated into a curve with an apogee of 6″.
On the sides in the area of the traveler there will be a 1/2″ aluminum plate bolted to the side just above the deck with a straight piece of the laminated plywood connecting to the top beam with bolts, a 10″ x 10″ gusset and a aluminum “T” bar where the “T” is 1 full inch as is the cross part.
This will be screwed to the wood piece and then the outer part. will accept the side structure on top of the aluminum plate and inserted into the notch in the aluminum upright that is connected to the wood upright.
The sides will be a layer of fiberglass with under a 1/2 ” piece of Nicor and two or more layers of fiberglass inside. I’m going to make a deck casting out of fiberglass to mount the sides in and the whole thing will be smoothed and faired with more fiberglass, resin, etc. the casting will ne bolted to the deck.
I don’t need to go further since the question is: Do you think this construction will be sufficient to handle the load of the traveler and its sheet?