Platform to bracket layup question

[take a potter]

I had found this picture of a Hermco platform a while back. I thought it was a pretty good shot of everything going on.



I do plan on glassing the front of the platform to the tub. Right now I have 7/16" of glass for a hanger rail at top of the front of the tub as well as around the perimeter where the bolts will go thru. It is about 5" wide. So I'll have plenty of glass at the top to bevel and glass the platform to it.

I was planning on two full height box stringers about 3 1/2" wide, similar in construction as the ones in the boat. Do you think that will be adequate?

[take a potter]

While I have been scratching my head. I broke out the plasma cutter and started making washers. 304 stainless 5/16" thick 2 x 2 3/8". 36 of these and that should take away another 12 lbs or so of buoyancy.

[Bigshrimpin]

Having a plasma cutter at your disposal is super helpful. You are a lucky guy. If you use 5200 b/w the boat and the bracket, you almost don't need any fastners at all (not that I would trust it). Getting the guardrail tested bracket off the seawolf was brutal. With all the fasteners removed, I lifted the entire stern of the boat (with a hoist) and hung it in the air for a week trying to break the bracket free. I think you could have driven the boat full speed with no fasteners and the 5200 would have never come free.

[strick]

The guy from Santa Cruz fiberglass Hawaii did just that and it still did not break loose

[Old'sCool]

36 bracket to hull bolts?

[take a potter]

Originally Posted by Old'sCool

36 bracket to hull bolts?

No 18. Washers both sides. Although, if i use 5200 to put it on, based on the guardrail test above I could use a few less maybe. Right now I am planning on going with the instructions that you so kindly sent me earlier. You can see the bracket you helped me create over on my other thread. Got it temporarily mounted today.

[FishStretcher]

If you use 5200, prep with acetone, not alcohol, as I believe that inhibits the cure.


My T-top aft feet are bonded to the deck with 5200. Technically a G10 pad bonded down and the feet screwed to that so as to not penetrate the deck. It works for towing at close to triple digit speeds. It's a whole different thing from Potter putty.


I do the same thing for all the transom transducer mounts- I bond down pads with 5200 and screw to that. It's underwater, so it's only ugly on the trailer.