Protecting heat tape from sliding tubs and from metal shelf

[qwerty53]

We have a 54-qt five-level rack for juvenile/small adult boas that's made from plastic shelving and the 12"x10" heat tape is covered with thin acrylic sheet that is screwed into the shelf. The acrylic was a bit expensive but it's doing a great job protecting the heat tape. The nice thing is that if we need to disassemble the rack to move it, the heat tape isn't directly attached to anything so the rack breaks down into easily-moved pieces.

http://www.homedepot.com/p/OPTIX-11-...C-27/202090111

What shelving you use??