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Pmullen503 wrote:The question is can you stand in the middle of the least supported section. Fiberglass over foam is good under tension but bad under compression (exactly what you'd subject the top surface to by standing in the middle of a poorly supported section.) .
So if I use at the entrance area...
Yestony.latham wrote:So if I use at the entrance area...
Are you glassing on both sides?
T
Tyrtill wrote:As long as the foam is semi supported (16" centers) you could probably use it as a floor for a roof tent since you are keeping your weight fairly distributed. If the foam is supported by the vehicle roof completely you would probably just have to protect it from sharp objects gouging it which fiberglass, PMF, or a heavy blanket would do.
I was experimenting with foam because I was thinking about making my benches out of it. Here is the video from that experiment.
I believe it was 16.5" space between the supports and the foam was supported at the one end completely by wood but the other end was completely open.
https://photos.app.goo.gl/MjAN2hbgB4pTJr3r9
(sorry about the weirdness of the dialogue in the video it was only meant for me)
I would think that if you put a 1/8" skin of wood on the bottom or wrapped the whole piece of foam in fiberglass or pmf you could probably get to 24" without support especially since you will be laying down for the most part.
gregkn73 wrote:Yestony.latham wrote:So if I use at the entrance area...
Are you glassing on both sides?
T
tony.latham wrote:gregkn73 wrote:Yestony.latham wrote:So if I use at the entrance area...
Are you glassing on both sides?
T
That will help solve the tension strength issue.
I've done a fair amount of fiberglass work and can't answer your question about adding a second layer of glass for kneeling strength. You're probably considering doing something that no one on this forum can give you a definitive answer on. I would suggest that you laminate a small piece of foam --4 square feet or so-- and give it a test.
It would make for a good practice run if you haven't used epoxy/glass before too.
Tony
Pmullen503 wrote:A surfboard is supported by water which spreads the forces out in the most advantageous way. Put that same surfboard between between two sawhorses and try standing on it. No one is saying it won't work but no one has tried it. Try it, if it works, great! Worst case you glue on another layer of foam and glass that too.
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