> I have decided to build a box beam type stronge back for my
> Guillemot.Three things I would like to know are: 1 how long should the
> beam be.2 how do I attach the end forms to a box beam.3 is there any
> reason why Icould'nt fill the gap inthe center of the beam with plywood to
> make it solid all the way through.

> THANK YOU IN ADVANCE AND HAPPY NEW TO ALL J.D. If your forms are 1/2" the beam should be 14'11" I cut a 1/2" wide slot the length of the end forms into the ends of my box beam and then just slid the end forms in and screwed through the beam to secure them to make the box beam more solid I drilled small holes every foot and a half or so and then filled the beam with expanding foam insulation, just be sure the beam is straight as it dries