stringer pieces in place.

[Lenny]

So that is what solid stringers look like ey!! I gotta question for you, how do you attach the floor, glue & screw???

[warthog5]

The stringer's and thwart's are not solid. They are hollow and usually filled with 2 part foam after they are installed.

[Bigshrimpin]

This is a cross section of an oceanmaster from Hermco's site.

[strick]

someone told me that Ocean Master leaves their stringers hollow. Sure looks that way in the pic. I wonder how much longitudinal strength foam adds..... if any to the stringers? I would imagine it helps some but is primarily in there for flotation.

Strick

[nestorpr]

Actually the foam will stiffen the whole assembly up and will act like a solid stringer. This is what DIAB cored panels are like and recently they came out on Shipshape TV explaining how a foam filled hollow fiberglass core could be stiffened by filling it with foam, the thicker, the stiffer. This will give the stringer a lot of strength, like using wood but keeping the weight and maintenance down. BTW, if you use CLOSED CELL foam it will not absorb water, more expensive but worth the money.

[warthog5]

Botapeje is exactually right. It really stiffen's it up for little weight.

[Lenny]

So if these are foam filled how do they rot????? Pardon my ignorance this is all new to me.

[strick]

Botapeje is exactually right. It really stiffen's it up for little weight.

Of course it helps stiffen it up but that does not answer my question. How much longitudinal strength does foam add to the stringer system? I was hoping to lure in a a reply from one of our engineers that frequent this board.

strick