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Old 01 March 2017, 10:21   #1
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Seat Extension

I decided I would make a little removable seat extension for the little rib to make it more comfortable when my wife or someone else comes with me. All the metal is SS and the wood is hardwood. Just need to source some foam, SS staples and upholster it

Dennis
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Old 01 March 2017, 14:56   #2
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id be concerned about the structural strength of the timber legs in a heavy sea they may not be up to it
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Old 01 March 2017, 15:31   #3
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that isn't going to last long and potentially cause a bad injury when it lets go for me.
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Old 01 March 2017, 17:28   #4
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Those legs are very strong hardwood and the fixings are bolted through quite think fiberglass. I will however add a triangular brace to make it totally rigid
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Old 02 March 2017, 13:47   #5
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I went to put the brace on today and realised that the pics make this little seat look weaker than it is. I still put the brace on each side and it is fit for an elephant to sit on now


Now for the foam and upholstery....... Whewre did I put those stainless steel staples
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Old 02 March 2017, 18:24   #6
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Not meaning to p1ss on your parade either - but to my eye - that seat is not fit for purpose. IMO, the timber size is the least of your problems. Fine on land - just not strong enough at sea...

soz!
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Old 03 March 2017, 01:40   #7
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Originally Posted by willk View Post
Not meaning to p1ss on your parade either - but to my eye - that seat is not fit for purpose. IMO, the timber size is the least of your problems. Fine on land - just not strong enough at sea...

soz!
And that is where the pictures don't do the strength justice. I can assure you that it is far stronger than it needs to be. As I said the timber is incredibly strong hardwood and even without the brace I have now added would be way beyond the strength needed.
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Old 03 March 2017, 04:06   #8
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Seat Extension

I'm not sure anyone is disagreeing that it is strong enough for a person to sit on.

The question is, is it strong enough and fixed securely enough to take the lateral and torsional force, which could be far higher than the weight of a person, put on it from a high G turn, rapid deceleration (wave stuff) or vertical drop (wave slam).

I think the idea is great, but personally I wouldn't risk injury to anyone as don't think it would be long until someone ended up on the floor or worse over the side.

May be, at a real push pottering around a harbour / inland water in flat calm at slow speed.
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Old 03 March 2017, 04:15   #9
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You can make preliminary test to estimate strength. Apart from that looks nice.
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Old 03 March 2017, 04:39   #10
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Best thing you could do with that is use it as firewood .....
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