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Lew Hodgett Lew Hodgett is offline
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First recorded activity by BoatBanter: Jul 2006
Posts: 348
Default Forming rounded corners with Fiberglass and ply.




If you want to scare me off, tell me about the itch of fiberglass, I
dread it..


I understand.

I think I'll adjust the dodger downward rather then adjust the boom
upward. It's a tall dodger now, so there is room for adjustment.


It's your call, but you need at about 6'-8" standing room as a basic
design goal. Might trim an inch or even two, but that is cutting it
close.

I was imagining that it would be built in place, is that a bad idea?


YES, bad idea.

Trying to work while up in the air as oppossed to standing on the
ground.

Sanding dust and excess resin dripping on the boat raather than on the
ground.

Want me to go on?

My boom and six dock apes should hold 350 pounds, but will use a

crane
if we have to.


In this application, the boom just gets in the way.

A crane doesn't get an itch.

A crane doesn't loose it's grip.

A crane doesn't get distracted by a pretty girl.

Want me to go on?

I'm surprised at the amount of epoxy needed. Thanks for the warning.


Do the calculation yourself.

Use 17 OZ/sq yard per layer of glass.

Lets say 3 layers of glass per skin or 6 layers for both skins or 102
OZ/sq yard of bimini.

102/9 = 11.33 OZ/sq ft or 102/9/16 = 0.708 or 0.71 lbs/sq ft.

Assume the epoxy weight = glass weight + 20% for drips, waste, etc
120%*0.71=0.85lbs/sq ft of bimini

If you add a 4th layer of glass, add 34%.

If you have 150 sq ft of bimini, you could get by with 150 lbs of
epoxy which would be about 4, 5 gal pails.

By the time you buy 4 pails, you are probably 75%-80% of a drum price.

That's why I suggested a drum, you can always find some good use for a
half a drum of resinG.

Lew