Obviously both the internal and external strongbacks can work just fine, there are a ton of boats built on each.
The only real issue I've got with the internal one is that it needs to be a fairly small section to actually fit into the boat and it's more difficult to make a rigid structure with smaller sizes. An aluminum or for that matter steel tube is probably the ideal.
Unless a builder wants to chop up fairly expensive premium plywood to make a laminated 2x4 most of the construction plywood these days is really poor quality and is rarely flat and without twist. Making a dead straight lamination out of bent and twisted plywood will at best be an interesting challenge.
You can make a useable external strongback out of cheap 2x4's you can laminate however many you need to make it rigid and fairly straight, doesn't need to be perfect, all that I'm saying.
Bill H.
(edit) btw, thinking of this, if you shop around, a 2x3 or 2x4 steel tube around 1/8" wall is pretty cheap, it's often what trailer tongues are made of (mild steel) and isn't grossly heavy. Not real hard to work with though you'd probably want to paint it to keep rust at bay. Spray of oil inside will keep most of the rust out of the inside.
Messages In This Thread
- Strip: Building With An External "Ladder" Strongback
James Doyle -- 10/20/2013, 7:07 am- Re: Strip: Building With An External "Ladder" Stro
Oliver -- 10/20/2013, 7:32 am- Re: Strip: Building With An External "Ladder" Stro *PIC*
Greg Galloway -- 10/20/2013, 9:36 pm- Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/22/2013, 4:11 pm- Re: Strip: Building With An External "Ladder" Stro
aedie -- 10/22/2013, 5:11 pm- Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/23/2013, 1:18 am- Re: Strip: Building With An External "Ladder" Stro
Allan -- 10/23/2013, 2:06 am- Re: Strip: Building With An External "Ladder" Stro
Etienne Muller -- 10/23/2013, 5:50 am- Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/23/2013, 8:58 am- Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/24/2013, 12:47 am- Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/24/2013, 8:51 am- Re: Strip: Building With An External "Ladder" Stro
Oliver -- 10/24/2013, 9:22 am- Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/24/2013, 11:10 am- Re: Strip: Building With An External "Ladder" Stro
ddaniels -- 10/26/2013, 2:24 pm- Re: Strip: Building With An External "Ladder" Stro
Etienne Muller -- 10/26/2013, 3:07 pm- Re: Strip: Building With An External "Ladder" Stro
Marc Upchurch -- 10/26/2013, 3:20 pm- Re: Strip: Building With An External "Ladder" Stro
Björn Thomasson -- 10/26/2013, 5:51 pm- Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/27/2013, 1:52 am- Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/27/2013, 10:41 pm- Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/29/2013, 1:40 am
- Re: Strip: Building With An External "Ladder" Stro
- Re: Strip: Building With An External "Ladder" Stro
- Re: Strip: Building With An External "Ladder" Stro
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- Re: Strip: Building With An External "Ladder" Stro
- Re: Strip: Building With An External "Ladder" Stro
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- Re: Strip: Building With An External "Ladder" Stro
- Re: Strip: Building With An External "Ladder" Stro
- Re: Strip: Building With An External "Ladder" Stro
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James Doyle -- 10/29/2013, 10:44 pm- Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/30/2013, 2:22 am- Re: Strip: Building With An External "Ladder" Stro
Marc Upchurch -- 10/30/2013, 4:10 am- Re: Strip: Building With An External "Ladder" Stro
Allan -- 10/31/2013, 1:14 am- Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/31/2013, 2:06 am- Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/31/2013, 12:48 pm- Re: Strip: Building With An External "Ladder" Stro
Marc Upchurch -- 10/31/2013, 1:59 pm- Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/31/2013, 9:18 pm- Re: Strip: Building With An External "Ladder" Stro
Bryan Kapteyn -- 11/1/2013, 1:16 pm- Re: Strip: Building With An External "Ladder" Stro
Marc Upchurch -- 11/1/2013, 5:35 pm- Internal Strongback Videos
Nick Schade - Guillemot Kayaks -- 11/2/2013, 5:52 pm- Re: Internal Strongback Videos
Bill Hamm -- 11/5/2013, 1:59 am- Re: Internal Strongback Videos
aedie -- 11/11/2013, 9:27 pm- Re: Internal Strongback Videos
Bill Hamm -- 11/12/2013, 12:32 am
- Re: Internal Strongback Videos
- Re: Internal Strongback Videos
Robert Horstmann -- 11/20/2013, 8:38 am - Re: Internal Strongback Videos
- Internal Strongback Videos
- Re: Strip: Building With An External "Ladder" Stro
- Re: Strip: Building With An External "Ladder" Stro
- Re: Strip: Building With An External "Ladder" Stro
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- Re: Strip: Building With An External "Ladder" Stro
Allan -- 11/3/2013, 3:03 am- Re: Strip: Building With An External "Ladder" Stro
James Doyle -- 11/3/2013, 4:49 am- Re: Strip: Building With An External "Ladder" Stro
Oliver -- 11/3/2013, 7:44 am- Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 11/5/2013, 1:35 am- Re: Strip: Building With An External "Ladder" Stro
aedie -- 11/11/2013, 9:14 pm
- Re: Strip: Building With An External "Ladder" Stro
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- Re: Strip: Building With An External "Ladder" Stro
Etienne Muller -- 11/3/2013, 5:52 am- Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 11/5/2013, 12:34 pm- Re: Strip: Building With An External "Ladder" Stro
Jay Babina -- 11/6/2013, 6:51 am - Re: Strip: Building With An External "Ladder" Stro
- Re: Strip: Building With An External "Ladder" Stro *PIC*
- Re: Strip: Building With An External "Ladder" Stro