Replacing a deck on shetland 535

[Docktor]

Found this thread when searching for reason my 570 has no "structural" ribs in the cockpit hull. Felt a spongy area on standing on the cockpit floor - cut it open to confirm black underside of the floor ply (original Shetland floor) and black/soft transverse rib. I thought the plywood rib was probably sitting on top of a glassed-in transverse member but was shocked to find nothing under it except foam.

It appears that the ply floor was laid down with three ply ribs attached to the underside - each end of which sat on the convex outer part of the hull - and the only glass applied was to the upper side of the ply floor. The foam was then poured into the cavity and it appears that the foam provided the major structural element.

Has anyone else come across this?

[Stokey1964]

Found this thread when searching for reason my 570 has no "structural" ribs in the cockpit hull. Felt a spongy area on standing on the cockpit floor - cut it open to confirm black underside of the floor ply (original Shetland floor) and black/soft transverse rib. I thought the plywood rib was probably sitting on top of a glassed-in transverse member but was shocked to find nothing under it except foam.

It appears that the ply floor was laid down with three ply ribs attached to the underside - each end of which sat on the convex outer part of the hull - and the only glass applied was to the upper side of the ply floor. The foam was then poured into the cavity and it appears that the foam provided the major structural element.

Has anyone else come across this?

Mine is a Mark 1 570 so has no foam (thank god!!) but this may help you with what should be there


Simon

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