Old 02-08-2019, 08:46 AM
  #23  
paler
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Join Date: Oct 2012
Location: Republic of Panama
Posts: 56
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Originally Posted by Bullshipper View Post
If the sponsons were filled with 2 part expanding foam there is no doubt it stiffened the laminate more than just air would.
2-4 lb/ft3 is usually used for flotation, and 4 will be more resistant to water, chemical and fuel absorption
6# is what is used to to make wider bulk heads about 3 " thick
and you can find the 13# stuff if you want even more stiffness and strength.
So if you take it out, add some more mat to the rounded tunnel radius to beef it up and some on the bottom and other side too.
The deck is one thing, but the weight of the bottom on the trailer is also reinforced by what you want to remove so I would not cut deeper than box bottom depth on the bh in view of that.
Gotcha, thanks
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