Ball-Pythons.net - OWAL Reptiles gives an excellent step-by-step explanation, with pictures, showing how to build a rack with back-heat installed.
Step by Step Build
Nov 26, 2013
by Editor in Chief
TortoiseForum.org - Here’s an excellent thread with step-by-step pictures showing the build of an insulated and heated outdoor enclosure for leopard tortoises to shelter in.@ TortoiseForum.org