Securing a pedestal base - Need help!

[Begeti]

Hey everyone, I need help and some advice. How did you all bolt or screw down your base. I have a 6 hole 7" x 7" pedestal that I'm attaching to 1/2" plywood with aluminum framing. Thanks everyone in advanced for your help!!

 

[jigngrub]

I went with 3/4" decking, 1/4-20 stainless "T" nuts, and 1/4-20 stainless oval head machine screws. My seats are stout.

 

[bobberboy]

If you can still get under the deck T-nuts are the way to go. Half inch plywood is a little light so if you can put a backer of some sort behind it wouldn't hurt.

 

[Analog Kid]

T nuts will definitely work. Another option is a 1/4-20 bolt and a big fender washer on the bottom to help spread the load over a larger area. Not as ideal as a big backing plate but every bit counts. And bolt it with nylock nuts if you go that route so they won't loosen with vibration

 

[redbug]

I placed a big 8 sided red with white letters piece of aluminum that I found hanging on a post at the corner
under my floor and used carriage bolts

 

[BigTerp]

I used stainless nyloc nuts and bolts for the base itself. It was to flimsly so here is how I reinforced it, which worked out great.

https://www.tinboats.net/forum/viewtopic.php?f=21&t=26774&start=330

 

[Begeti]

You guys are great! Thanks for all of the help!

 

[Captain Ahab]

redbug » Fri May 23, 2014 10:44 am[/url]"]I placed a big 8 sided red with white letters piece of aluminum that I found hanging on a post at the corner
under my floor and used carriage bolts

Recent photo of RedBugs corner: