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Old 02-24-2010   #1
Lexington, Kentucky
Paddling Since: 1993
Join Date: Feb 2010
Posts: 1
Cat frame

So I am going to custombuild my first cat frame. The design I am going to use is a play on a NRS Fish cat frame with a trampoline floor. With clavey oar towers.

the question I have is with the frame tubing I have found a local place and they carry .047 wall thickness in 1 5/8" they can also get it up to .140, I was wondering what would be the best size to use?

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Old 02-25-2010   #2
Boulder, Colorado
Paddling Since: 1991
Join Date: Jun 2007
Posts: 83
The NRS tubing is 1 1/4" Schedule 40 aluminum pipe. When I was looking into it, I found that asking for that specifically lowered the price considerably.

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Old 03-04-2010   #3
SE, Tennessee
Paddling Since: 1991
Join Date: Jan 2008
Posts: 28
don't know, good question though.
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Old 03-04-2010   #4
Wirednoodle's Avatar
Portland, Oregon
Paddling Since: 1986
Join Date: Feb 2009
Posts: 114
With AL you will crush a wall that is .047 thick as soon as you try clamping onto it. Sch 40 wall in 1" pipe is .133. It goes up about .005 or so every 1/4" in pipe size. Definitely go with a thicker wall.
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