I find that the more simpleminded the question, the more likely people here will argue about it. This should be interesting.
I'm finally getting ready to attach the face frames to my first two bookcase units. Apart from some pocket screws for the top and bottom rails (whose holes will never be seen), I plan to just glue and clamp. I took a first stab at laying out where the clamps should go. I find that it's a little less nerve wracking if I have all of the clamps at hand and set to something like the right opening before I apply any glue.
and
I have two questions:
Do I need three clamps for each rail, as shown in the photos? Or would two (plus the clamps at the ends of the rails) be enough? The units are 21" wide.
I have shown five pipe-style clamps on each side (one at each T intersection) plus some cheap bar clamps in between the shelves that are further apart. Do I also need clamps between the shelves that are closer together? Those are 11.25" apart on center.
I feel I'm going to get a lesson on cauls, which, if quick and simple, I could consider. But my spare time has become very spare indeed lately.
Thanks in advance.