Mike Oehler's engineering tables spec out the girders and beams to be Fir / Larch.
Can I use those engineering tables with other types of wood? Does it make a big difference what type of tree you use? Are hardwoods or softwoods better?
Beware the other head of science - it bites! Nibble on this message:
permaculture thorns, A Book About Trying to Build Permaculture Community - draft eBook
