Hello, I'm new to this forum...my first post was yesterday! https://www.tinboats.net/forum/viewtopic.php?f=13&t=5968 Anyhow, to your question;
There are several factors to consider, including the wall thickness of your angle, the rigidity of the material it's supporting, the distance it has to span etc. IMHO, the answer would probably be "no." On my boat, I needed to span over 4' in width, requiring that the front deck be made in 2 halves. (running front to back) With the price of marine ply., this was a painful realization! :shock: I also had to consider my mass~over 330lbs. A little flex in the deck would be OK, but I needed to know that if I was standing on the seam, it wouldn't come apart. I ended up using 1"x2" aluminum angle (the 2" limb being vertical) and 5 pcs. of it. It still flexes, but it's very solid. To mount it after carpeting, w/o seeing it from the top, here is what I did;
1.Decide on where to place the angle, and drill it where you want the machine screws to be. 5/16" holes for 1/4"x20 machine screws. Transfer the hole locations onto the marine ply., and drill the same size holes, or slightly smaller. (9/32")
2.Now, you want to "trap" the bolts in the ply., facing down, so that only the threaded post sticks out of the surface. Counter-bore the holes from the bottom so that the the nut will be flush to the surface. Countersink from the top, as shown in the drawing. (I'll use the names I gave them IN the drawing now) You want the SS nylon lock nut #1 to be VERY tight when you mate it with the SS machine screw. Look at Step 2. The SS machine screw and SS nylon lock nut #1 are joined, the nut below the surface of the marine ply.
3.With all the SS machine screws in place, simply install the 1"x2" aluminum angle over the threaded posts of the SS machine screws, through the holes you pre-drilled. Using SS nylon lock nut #2, fasten the aluminum angle in place. It is CRITICAL that SS nut #1 and the screw are very tight (use Loctite) otherwise, SS nut #2 could start to spin the SS machine screw before it's done it's job.
4.Install marine carpeting!
I hope this helps, this solution worked very well on my deck.
Cheers,
C40