How do I .......

[simongoldthorpe]

Got new flipback seat for the flybridge. What does the team think is the best way to fix it to the deck?

I cant see that fat self tappers and Silkaflex will give enough grip. I dont want to use bolts because that means taking down the headlining below.

I've tried 4 inch nails but they keep coming out.

25 ml of S*****n to the most helpful response.

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[hlb]

Yer buggered then arnt you.

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Haydn

 

[simongoldthorpe]

No solly for you Haydn.

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[ccscott49]

If you dont want it to eject you/loved ones over the side (a la james bond) with it, when you hit some lumpy stuff, through bolt it!

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[tcm]

Re: Sorry

If this is an individual seat with metal base (have you a pic?) I'm afraid I think you will have to take out the headlining below, and fit a metal plate too, bolting them all through that, up into the plate on the bottom of the seat so a plate top and bottom sandwiches the floor. Flybridge seats have to be able to take at least two people grabbing them sideways with their full weight. Otherwise it think your seat will be a bit more flippy that you bargained for!

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[longjohnsilver]

Ok then, why not fibreglass some nuts (metal ones!) to the deck and then bolt your seat onto those? Will mean it's a fraction higher, but what's an inch or two between friends.

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[BarryH]

Stainless toggles, use them all the time. Spreads the load over a wider area around the hole. Use a sealent/adhesive as well though.......no, don't thank me, no need and I don't use soltron. No need, I don't pick up bugs like you dirty oil burners!!

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[Dave_Snelson]

and the answer is....

Pop rivets. They come in varying lengths, diameters (and hence strengths). Use with Sikaflex and you'll be OK. You can hire the rivet gun if you don't want to buy one. Personally, I think they are invaluable. Many makers use them to fit things you can't see / get at / replace.

All IMHO of course

<hr width=100% size=1>Madoc Yacht Club
<A target="_blank" HREF=http://www.madocyachtclub.co.uk>http://www.madocyachtclub.co.uk</A>

 

[hlb]

Ok then. Weld some S/S nuts to some 3" square S/S plate. Fibre this lot down. Plenty of F/glass. Also self tap at least four holes per plate.

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Haydn

 

[tcm]

Re: surely not?

eh? You can't pop-rivet a chair to the deck except as a booby trap, surely? He has a big chair, and needs to attach it to a fibreglass deck. Not sure pop rivets would fix the thing well enought stop theft ata boat show, let alone hold it at sea - the fibrglass moves and lets go of the rivets unless it is something flat like a badge or vent he is attaching. imho.



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[Divemaster1]

If you worry about grip with self tappers etc., and do not want to go for the big job of taking the lining down...you could try some of the expanding rubber fixings .... see below and should be waterproof (combined with appropriate adhesive of course...

..., or one the other SS "hollow wall" fixings you can find, which expands ....

, but these will probably require to be set in the "expanded" mode with glue first, then unscrew, cut the bolt and then fix the seat with proper adhesive and sealant (not forgetting the appropriate adhesive to lock the bolt to the fixing to prevent it shaking loose with vibrations).

There are probably other alternatives available. as a sample, I have seen expanding rubber mountings with proper threaded, receiving nuts creating the expansion for the rubber mounting......

Good luck anyway....

<hr width=100% size=1>Alf

 

[ccscott49]

Re: surely not?

I totally agree!! Pop rivets is for cars and aeroplanes, not holding seats down, nor are self tappers! How are a cars seats fitted? They have to be bolted down, (By law) Construction and use regs. same goes for boat seats!! IMHO

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[ccscott49]

I'm not sure the strength of these picture hanging fittings would be quite up to the job of holding a seat down on a flybridge in a seaway, especially the rubber ones.

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[TroyTempest]

Easy Answer

Pay someone to do it for you!

TT - In "Soltron? Ha!" mode!

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[tcm]

Re: surely not?

Yes. all of the fixings without access to both sides (butterfly whatsits, pop rivets and so on) rely on the strength and rigidity of the immediately-surrounding wall (or in this case floor/roof) material - which can't be trusted to hold something with the leverage of a seat. Through bolting is a start, but a plate underneath would be an even better solution.

However, i somehow don't think I'm gona win the solly....

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[hlb]

Only trouble I see with this method is. It requires long bolts which might go through head lining. However if it dont then this is an option combined with steel plates with nut welded in. So that a large number of fixings can be screwed down.

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Haydn

 

[ccscott49]

Re: surely not?

Yes, sorry, but when I say through bolt, I mean properly, with load plates etc. Not making myself understood properly.

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[hlb]

Re: surely not?

But that method is unaceptable. Eawedy said that. I said E's Buggered E said I dont win Sod all.

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Haydn

 

[tcm]

most helpful response

I see. So, it is n't the best way to fix it that wins, but the most helpful response. Well, in that case

simon, i would gladly help you take down the rooflining, but i am miles away. However, i would ask that you perhaps consider keeping the seat maybe downstairs, with some cork stuck underneath it? Or, sell the seat back to the supplier, cos you can't throughbolt it with plate underneath? Or just use the seat up on deck in harbour? Either way, go to the pub and have a think about it first. Or get someone else to do it.

I think this is jolly helpful.

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[Observer]

Others more expert than I on engineering type stuff but - as I learned from process of major house extension/re-modelling - if you can't hide something, make a feature of it.

So, load spreader plate on flybridge deck no problem. Bolt down through big washers or special decorative plate (perhaps circular and nicely finished) with nice s/s dome head nuts. Make it look as though it's supposed to be there?

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