how much reinfrorcement for seat posts

[BIGcarpy50]

I am about the throw the deck down

should I add another peice under the deck to help support the post.....Im using the attwod posts that just pop in.....The deck is 3/4 Marine Plywood.......

 

[greatoutdoors]

Re: how much reinfrorcement for seat posts

I would say the more support, the better off you'll be.

 

[Bob_VT]

Re: how much reinfrorcement for seat posts

Ahhh the recycler in me comes out....... got room for a sheet of aluminum under the seat posts (under the deking)....... like an old road sign for no parking

Or

Go the an additional piece of 3/4 if you have the room that is glassed in and sealed.

When you have Post seats that is serious leverage on the base when the weather is rough and your weight is in the seat.

 

[tashasdaddy]

Re: how much reinfrorcement for seat posts

double up deck, in that area,

 

[Mark_VTfisherman]

Re: how much reinfrorcement for seat posts

I like the sheet of aluminum idea. Sylvan and several others use a piece of 1/8" aluminum under the decks OEM. Extra plywood with stainless tee-nuts is another good option.

 

[erikgreen]

Re: how much reinfrorcement for seat posts

Also, be aware that at least some seat posts aren't rated for use under way... that is, you're not supposed to sit on 'em when the boat is moving.

If you've got some of those, probably you should reinforce them and then have somewhere else to sit, they're too weak to use while driving.

If you've got the heavy seat posts you can drive with, then at least use aluminum plates to spread the bolt load, use bolts instead of carriage screws, and ideally thicken the deck. Plus seal well.

Pedestal seats are hard on decks.

Erik

 

[sschefer]

Re: how much reinfrorcement for seat posts

I am about the throw the deck down

should I add another peice under the deck to help support the post.....Im using the attwod posts that just pop in.....The deck is 3/4 Marine Plywood.......

If the posts will be installed in a location where there is more than 36" between the nearest two supports, (think floor joists here as an example of the picture you need in your mind), then yes, you should back it up with something.

If there's 36" or less, and most likely this is the case then you don't need to back it up but you certainly can if you want. The bases are designed such that they adequately spread the load on a standard 1/2" plywood deck because that is what most decks are and the manufacturers wouldn't sell much product if everyone had to reinforce or replace their decks just to install them.

 

[erikgreen]

Re: how much reinfrorcement for seat posts

The bases are designed such that they adequately spread the load on a standard 1/2" plywood deck because that is what most decks are and the manufacturers wouldn't sell much product if everyone had to reinforce or replace their decks just to install them.

I'm pretty sure those are the kind you're not supposed to sit on when the boat is moving, FYI.

 

[fishrdan]

Re: how much reinfrorcement for seat posts

The 01 Crestliner I'm rebuilding had 1/8" aluminum backing plates under each pedestal. Deck bases were attached with #14 screws or 1/4" bolt/nuts where possible. Original decking was 1/2".

 

[sschefer]

Re: how much reinfrorcement for seat posts

I'm pretty sure those are the kind you're not supposed to sit on when the boat is moving, FYI.

If you're talking about sitting on the posts, nah I wouldn't recommend that even when not moving... Just kidding....

I'm not sure which Attwood posts and bases he has but you're right, if they don't lock in automatically and require manual release of the locking mechanism then they can't be used while underway. I have the Springfields that autolock the bases and the swivels. They are legal in all 50 states.