You may refer to a truss as the rafter, but it's basically the skeleton of the roof, carrying the weight of the frame and supporting the walls of the building. Trusses are very important to preventing the walls from bending or flexing, more so.
If you want to get started blacksmithing and can't find an anvil, you can make one out of a piece of RR track for small items and knives.I'm not a blacksmith and I don't plan to start, but I would love to have this on my work bench.
Warm a Room with Only a Candle and a Few Terra Cotta Pots.The terra cotta pots concentrate the heat using convection. While you won’t heat a whole house with it, it can definitely warm your hands and make a cold night much more bearable .