I'm building a book case out of melamine. The drawing below show the normal and exploded view. Dimensions are 110cm wide, 30cm deep, 126cm high (~43"x12"x50")". I'm worried about the stability of it, since it needs to support quite a bit of weight. The white panels are 3cm (1 1/4") thick, the "wooden" panels are 1.9cm (3/4") thick.
I have reinforced the side with steel rods and plan on adding washers and nuts on there (not shown in the drawing) to make the ends more sturdy.
I have a couple of questions:
- In general, do you see any issues with the weight it needs to support? (the largest span is 45cm (17 3/4")). According to what I saw for melamine of this thickness, that should be fine
- Do you see any obvious issues that could cause racking? I added the steel rods to prevent this
- And my biggest issue: In the exploded view, where the red reference line is drawn and the horizontal cross supports connect to the upright support, I'm not sure which type of joinery to use. I don't want to add screws from the outside in. I thought about either dowels or pocket screws, but I'm not sure whether they will be strong enough to support the weight.