Bookshelf that can support the weight?

I noticed Sterilite and similar brands have like garage type shelving. Some of it is thick hard plastic and some are commercial wired racks. I'm triple checking dimensions and weight limits. I figure if it's meant for garages it should handle the heating pads fine.

Current idea.
Is the Hyper Tough 36 inch, five shelf unit, or something similar. Snakes on the middle three shelves. Put black fabric on three side (the short sides and back) and have black towels under each tank. Which will help with humdity.
Maybe??

Look into pvc cages. Getting a stack of those would serve your purpose a lot better and be nicer looking. Aquariums aren't great for snakes, they are heavy, breakable, harder to clean, heat, and are very open.