No answer- FG frame with wood BOAT over it.?

[skipper68]

Weirdest thing I have heard. Fiberglass frames with a Carvel planking over it?WAY beyond my-OMG!No chance. HOW would it stay together?Even canvas rotted double plank. WT-Heck? Answeres?

[wizbang 13]

More questions than answers, what are you talking about, for one.

[Ian McColgin]

May be getting several things confused. Fiberglass beams are widely used in both land and marine construction. A home builder might well use them in a composit core construction. Enough commercial glass boat builders use glass frames that perhaps there's one out there building one-off shapes with glass frames and either wood or c-flex or some combination planking.
Wiz is right, more info needed.

[JoshuaIII]

I have seen a 50+ years old sailboat about 60ft long which was carvel over steel frames. Worked well for all that time and won several races. It saved a lot of weight for this size boat at a time where laminated hull was not common.

[JimConlin]

In the current Professional Boatbuilder, there's an interesting article by Bob Stephens about some innovative materials usages in a recent boat.
Among the innovations are some uses of composite framing members.

[RFNK]

I can't think of any reason not to do it except that there's a lot of work in building up solid FG members. However, if there are companies building standard sections, especially good, light beams, then that sounds great to me. What's the problem?

Rick

[JimConlin]

I can't think of any reason not to do it except that there's a lot of work in building up solid FG members. However, if there are companies building standard sections, especially good, light beams, then that sounds great to me. What's the problem?

Rick

There are pultruded glass composite sections in angle, rectangular tube, I-beam and other forms. Being pultruded they're not a particularly strong composite.
Extren is one brand. Hamilton Marine carries some of the items.

[wizbang 13]

They won't rot like yer typical oak frame.

[seo]

Composite construction, wood over steel/iron, used to be very common. The famous clipper ship "Cutty Sark" was built that way. One reason for not plating with steel was that there was no way to get anti-fouling, which you could do on wood planking by sheathing with copper. I remember working for a while on a 100+ foot schooner called the "Fair Serrae," built in the UK, probably in the '20's, teak plank over steel. Galvanized iron bolt plank fastenings.
As far as FRP frames go, The main use I can see would be for a repair. I can see making a frame-width pre-preg lamination of bi-axial and maybe vinylester or epoxy, and then keep it in the freezer until you are ready for the next frame, roll it out in place, wait for it to kick, and then fasten with stove bolts. It might allow reframing without ripping out a lot of interior joinerwork, particularly back aft, when working under the cockpit.