Thanks guys. My shelves in that cabinet are 1/4" thick. Tumour was acting up when I posted earlier and I couldn't think of "plexiglass" which is what the glass people gave me. Their adhesive doesn't have a long shelf life (no pun intended) and the rods loosen and fall onto the shelf below.

My problem comes from putting too many pieces on each shelf--a problem I can't resolve until I get more cabinets. I've purchased plexiglass risers that are narrower than the glass shelf they sit on and stagger the sculptures. Each shelf and its two risers hold from 8 to 10 LEs and that's where the weight issue comes into play.