Gluing a back

[cgallery]

Should glue be used on a box back if all the components are plywood? Or is it still ill-advised for some reason?

[Warren]

Are you referring to a cube with a back or the bottom of a box with a lid? I think a little more info would be good. What is the construction? Rabbitted edges? Glue blocks? Butt joints? What is the intended use?

If the back is not used to keep the cube square, and will not have stress you might consider just pinning it. If it is an integrel part of the structure, you could rabbit it in and glue it. If there's enough surface nails or screws would work.

If it is the bottom of the box, I would want more support, depending on the load, than glue only.

Hope this helps.

[mikeinkcmo]

If its all ply, rabbet the sides, bottom and top cut back to fit and be sure its square. If its a rough duty or wall hanging box use thicker material. Apply glue and fit into place. Clamp till dry.

[LarryG]

As I read the OP, the real question here is not about joinery but about wood movement. He is asking: in an assembly made entirely of plywood, are there still wood movement issues that would preclude the use of glue?

The answer is No. Whatever the purpose of the assembly, whatever joinery is used, as long as everything is plywood you can use as much glue as you like.