We used some old 1x4's that were 8' long and laminated them with the joints scarfed and offset every 4'. By gluing then nailing one joint, you can torque the assembly straight (string line for a reference) prior to nailing the next joint. Complete the unit by nailing every 6".I have never seen a 2x4 that is as straight or strong!

: I'm going to make my forms for my kayak tonight. I'll be using 3/4" 11
: ply guatambu plywood. I have some reservations about using a 2 x 4 for the
: strongback though. Framing lumber that we get in this area is really
: crummy. You can hand pick it in the lumber yard and it looks nice and
: straight. But after you take it in your shop and it continues drying, it
: can wind or curl considerably.

: I've considered laminating up a 2 x 4 beam out of kiln dried oak. And, I've
: looked at making the ladder type strongback as shown in Nick Schades book.

: I'd like to hear many opinions in order to assist me in making a choice.

: Thanks,

: John