Jonathan Lee pondered from the far end of the porch:

>I'm planning on building a few torsion boxes for shelving.  They will be
>just longer that 6 feet.  My quandry is how many clamps I need to glue the 1
>ft x 6 ft quarter inch plywood to the torsion box frame.

Take a hint from the cedar strip canoe and aircraft rib builders.  Get a
stapler and wack it together.  Pull the staples out after the glue dries.
That little gem does assume that you can live with the dots that will
be left by the staple holes.  When I did the canoe I shot the staples
through cardboard to make it easier to pull them back out.  Glossy
wine box cardboard worked best :-).  Other options for pulling are the
plastic that holds six packs of Coke together and the string that Home
Despot passes out for tying down loads.

>If I know the gluing surface area, is there a numerical estimate of how much
>force (in pounds I guess) I need to apply? How much force does a really
>tight Pony clamp exert?

A whole lot less than you need.  SWMBO vacuum bags her marquetry.  An
auto vac pump and thick poly sealed with plumber's putty does the
trick there.  No staple holes but a little more expense.  Be careful
that you done crush things.

Dave
Retsof, NY is downright cold tonight!!!