KBBS Archive 60,000

Re: Strip: Internal strongback

Posted By: Ross Sieber
Date: Thursday, 28 February 2002, at 10:01 a.m.

In Response To: Strip: Internal strongback (Craig)

: OK, it's time for The Plunge; the forms are here, the strips are here, and
: it's sawdust time for a Spring Run. For a number of reasons, I'm doing an
: internal strongback, but I want more rigidity than a simple 2x4. Planning
: on laminating 1/2" ply into a 2x3.5in beam, probably with vertical
: pieces topped and bottomed by a horizontal plate; should that be stiff
: enough to keep this newbie (first effort!) straight?
: Thanks in advance for any input!

: Craig

A plywood beam may not be as rigid as a 2x4. Mine isn't. Mine's made of
3/4" plywood, and it is much more flexible than a 2x4, especially
sideways. It sagged a little bit, maybe 1/16" after I put the forms on.
It doesn't seem to twist much, if at all, though.

The reason I went to the plywood beam was because my 2x4 warped before
I started stripping, and I didn't want to risk having the next one warp
when I was half done. So far it's working great, but you have to be very
careful about alignment at first. Add a few strips to each side and it
becomes very sturdy. As far as I can tell, my hull is straight as an arrow
and I think it's going to stay that way.

There are some good reasons to use a plywood beam, but I am not sure rigidity
is one of them.

Messages In This Thread

Strip: Internal strongback
Craig -- Thursday, 28 February 2002, at 8:44 a.m.

Re: Strip: Internal strongback
Paul G. Jacobson -- Thursday, 28 February 2002, at 9:33 a.m.

Re: Strip: Internal strongback
Ross Sieber -- Thursday, 28 February 2002, at 10:01 a.m.

Re: Strip: Internal strongback
Joe -- Thursday, 28 February 2002, at 10:34 a.m.

Re: Strip: External strongback *Pic*
rick thomas -- Thursday, 28 February 2002, at 6:24 p.m.

Re: Strip: External strongback
Ross Sieber -- Thursday, 28 February 2002, at 6:40 p.m.

Re: Strip: Internal strongback
Bill Oetjen -- Thursday, 28 February 2002, at 11:19 a.m.

Re: Strip: Internal strongback
Joe -- Thursday, 28 February 2002, at 12:23 p.m.

Re: MDF, OSB and Particle Board
Nick Schade - Guillemot Kayaks -- Friday, 1 March 2002, at 9:39 a.m.

Particle board
Brian Nystrom -- Thursday, 28 February 2002, at 12:38 p.m.

Re: Particle board
Joe -- Thursday, 28 February 2002, at 12:50 p.m.

Re: Strip: Internal strongback
jim kozel -- Thursday, 28 February 2002, at 11:48 a.m.

Re: Strip: Internal strongback *Pic*
John Schroeder -- Thursday, 28 February 2002, at 1:43 p.m.

Re: Strip: Internal strongback
Ian -- Thursday, 28 February 2002, at 12:46 p.m.

Re: Strip: Internal strongback
Rob P -- Thursday, 28 February 2002, at 1:19 p.m.

Re: Strip: External Strongback
KenC -- Thursday, 28 February 2002, at 9:49 p.m.

Re: Strip: Internal strongback
Scott Fitzgerrell -- Thursday, 28 February 2002, at 1:06 p.m.

Re: Strip: Internal strongback
Rob Macks -- Thursday, 28 February 2002, at 2:12 p.m.

Re: Strip: Internal strongback
Joe -- Thursday, 28 February 2002, at 2:30 p.m.

internal has its merrits too
Tom -- Thursday, 28 February 2002, at 11:01 p.m.

Re: internal has its merrits too
Scott Fitzgerrell -- Thursday, 28 February 2002, at 11:50 p.m.

Re: internal has its merrits too
Joe -- Friday, 1 March 2002, at 1:19 a.m.

Re: internal has its merrits too
Richard Boyle -- Friday, 1 March 2002, at 9:21 a.m.

Well said *NM*
Tom -- Friday, 1 March 2002, at 8:04 p.m.

Re: Well said ....MAYBE ?
Joe -- Friday, 1 March 2002, at 9:25 p.m.

Re: Well said ....MAYBE ?
Joe -- Friday, 1 March 2002, at 11:07 p.m.

Re: Well said ....MAYBE ?
Tom -- Saturday, 2 March 2002, at 5:32 p.m.

Re: Well said ....MAYBE ?
Joe -- Saturday, 2 March 2002, at 6:25 p.m.

Re: Well said ....MAYBE ?
Craig -- Saturday, 2 March 2002, at 7:49 p.m.

Re: Well said ....MAYBE ?
Richard Boyle -- Saturday, 2 March 2002, at 10:13 a.m.

Re: Strip: Internal strongback
Ken -- Thursday, 28 February 2002, at 6:18 p.m.

Re: Strip: Internal strongback
Tom -- Thursday, 28 February 2002, at 10:43 p.m.

Re: Strip: Internal strongback
Richard -- Thursday, 28 February 2002, at 10:54 p.m.

Re: Strip: Internal strongback
John Skinner -- Thursday, 28 February 2002, at 11:45 p.m.

Re: Strip: Internal strongback
Andy Waddington -- Friday, 1 March 2002, at 4:14 a.m.

Re: Strip: Internal strongback
Nick Schade - Guillemot Kayaks -- Friday, 1 March 2002, at 9:18 a.m.

Re: Strip: Internal strongback
Rod -- Friday, 1 March 2002, at 11:56 a.m.

I'm sure we can beat this one to death
Tom -- Friday, 1 March 2002, at 8:33 p.m.

Re: I'm sure we can beat this one to death
Don -- Saturday, 2 March 2002, at 11:17 a.m.

death throes
mike allen ---> -- Monday, 4 March 2002, at 1:59 p.m.

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