Pedestal seat replacement

[keith]

Went out of the Golden Gate yesterday and my 300 pound friend along with the hefty waves were too much for one of my pedestal seats. It is very loose at the bottom and is more of a rocking chair now. Does anyone know where I can find a replacement or a used one?

Thanks,
Keith

[77SceptreOB]

Is it the pedestal or the screws coming out of the floor?

[keith]

Originally Posted by 77SceptreOB

Is it the pedestal or the screws coming out of the floor?

Definitely the pedestal. Specifically where the tubing goes into the base. The upper half where the seat bolts is fine.

[htillman]

Post pic. I've got a couple old ones

[Capt Terry]

[QUOTE=keith;237687]Definitely the pedestal. Specifically where the tubing goes into the base. The upper half where the seat bolts is fine.[/QUOT

I had this problem a couple of times on my 1976 20' Seafari pedestal seat years ago. The problem is the tube is fillet welded to the flange only on the underside of the flange, apparently so what is seen looks better. I had it rewelded and the same thing happened again. After the second failure, a different weld shop put a fillet weld underneath and on the top of the flange. I have had no problems since.
Capt Terry

[keith]

Here are two pictures. One leaning back and one forward, which is pretty much straight up.

[keith]

[QUOTE=Capt Terry;237726]

Originally Posted by keith

Definitely the pedestal. Specifically where the tubing goes into the base. The upper half where the seat bolts is fine.[/QUOT

I had this problem a couple of times on my 1976 20' Seafari pedestal seat years ago. The problem is the tube is fillet welded to the flange only on the underside of the flange, apparently so what is seen looks better. I had it rewelded and the same thing happened again. After the second failure, a different weld shop put a fillet weld underneath and on the top of the flange. I have had no problems since.
Capt Terry

Terry,
That makes sense to me. I will take it down and give it a look and see if I can get it welded. Thanks for the advice!

Keith

[Capt Terry]

[QUOTE=keith;237744]

Originally Posted by Capt Terry

Terry,
That makes sense to me. I will take it down and give it a look and see if I can get it welded. Thanks for the advice!

Keith

In my jet engine design engineering experience, our company avoided fillet welds as much as possible. A single fillet weld was never allowed because there is basically a crack on the non-welded side of the joint. So if fillet welds were used there needed to be two, one on either side of the joint. Picture an upside down "T" with a fillet weld only on one side of the base of the "T". As the vertical leg is loaded back and forth the built-in crack from the non-welded side will continue to grow. It's a lot less likely with fillet welds on both sides of the vertical leg.