Anchor winch advice

[Commander_47]

I am mounting a Trac 35 anchor winch on a 24 foot fiberglass hull. I am using a 20lb plastic coated river anchor. The boat will only be on a freshwater lake, maximum 40 feet deep, and very mild current. I only want to use it for fishing and in the shallows.

Where I want to mount it is up under, and in front of, what would normally be the anchor well.

To spread the load around, I cut a piece of aluminum diamond plate, and put in 4, 5/16 zinc plated steel rivet nuts. I plan to coat these with waterproof before installation. Where they are located, however, the boat would have to sink to get them wet.

My question is this. Will these hold up? According to the book, the upset (pull out) strength of these steel rivnuts in a plate of steel is 3650, and aluminum, 2150.

That seems pretty robust to me. Also, the winch is on a circuit breaker so it seems to me that the breaker would pop before my winch went in the drink.

Just seeking any and all advice on this setup.

 

[dingbat]

I doubt it will hold up.
How long from the bolts to the end of the pulpit?

What is the pull strength of the winch?

In comparison, mine is thru bolted through 1/4” aluminum with 1/2” bolts

 

[dingbat]

I doubt it will hold up.
How long from the bolts to the end of the pulpit?

What is the pull strength of the winch?

In comparison, mine is thru bolted through 1/4” aluminum with 1/2” bolts

Ok, looked it up
Winch pull x cantilever length comes out to 200 ft pounds.

Four (4) 5/16” bolts would work, but not a fan of rivet nuts in high vibration environments.

Through bolting woth ny-lock nuts would make a much more robust connection in the long run

 

[Commander_47]

I want to thank you guys for the advice. And I agree with you both.

I decided to double up on the on the backing plate and use the big end of the rivet-nuts as the primary load bearers.

The second piece of diamond plate gives another layer of pull through strength, effectively doubling what I had before.

The big nut in the hole in the plate is for me pulling the plates up into place. I have to do this from the top, as I can't reach it from the bottom. After it's in place, I can remove the big nut and bolt, and use the hole to run my wiring.

Thanks for the insight!!!!