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Old 07-11-2014, 10:00 PM
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Fiberglass body on steel pan?

So, only my second post here, but I got so many great answers on my first one I'm hoping you guys will come through for me again. I'm going to be making my own fiberglass body, then bolting it to a steel frame. Any advice on reinforcement? So far my plan is to glass some 90 degree steel plate into the body, and drill corresponding holes in them to align with the holes in the frame. Good idea, horrible, room for improvement? Any advice is greatly appreciated. Thank you!

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Old 07-11-2014, 10:11 PM
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It will work with some common sense placement of the mount plates and keep them rough finished with many holes for resin penetration.. Like a pasta strainer.. buried in matt and resin.
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Old 07-11-2014, 10:18 PM
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Originally Posted by BOBCRMAN@aol.com View Post
It will work with some common sense placement of the mount plates and keep them rough finished with many holes for resin penetration.. Like a pasta strainer.. buried in matt and resin.
So, the vertical part of the steel plate (sandwiched in the layers of glass) should look somewhat like a cheese grater? Should I consider some way to anchor it inside the glass, like maybe a piece welded on top of the vertical part, perpendicular to it? (I know, weird. Think like a steel T inside the body, with holes in it for resin.
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Old 07-12-2014, 05:50 AM
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A "T" or "L" shape would be good. The trick is to keep the resin over and thru the holes in the plate. A flat plain plate will eventually break loose from dis-simular expansion rates. The holes keep the bond..

I did some glass work back in the sixties and an old GM guy showed me the difference on bonding steel mounts.. That body is still sround. Tho mounted on a different chassis than when originally done..

Got back into the glass work lately with the front end and doors for my Studebaker gasser. " itchy" stuff..
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Old 07-12-2014, 10:23 AM
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When I did my car, I had just the outer skin. I built a square tube frame all around inside. Built the floor using 3/4 plywood. Body mount areas were also in steel and was attached (welded) to the frame inside. The complete steel frame was glassed into the body along with the floor. Pay attention to the weak spots, such as the pillars. In my A pillars, I used 1/4 inch steel.
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Old 07-12-2014, 12:31 PM
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Back in the day when I worked at the glass plant we built some bodies.. What we did was to reinforce the firewall and build an aft bulkhead and floors out of plywood and encapsulated that with glass.. incidental reinforcing was done with pvc pipe hot glued to the interior and covered with glass to make a reinforcing ridge.. the bodies were attached by means of through bolts through the floor and the mounting bracket on the chassis.. The bodies were quite strong and rigid as I recall and since we built the boats the same way I expect some of those bodies to be still around..

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