This is a very basic question and I can't figure out the right Google query: how should you clamp glue ups of long seams?
For example, say I'm glueing a pine 2x2 to a 2x6 to make a ledge to support slats to support a twin mattress (75" seam). That's 1.5 x 75 x 150 pounds of pressure. Clearly I don't need 112 small clamps. But what do I need?
Edit: I looked at this question but there was no practical answer (which, based on comments on this question, is "fewer clamps than the math says plus a bunch of screws").