Hi, I am building a tree house in a remote area of Vancouver Island, BC, Canada without any road access for miles. I would like to use the trees on-site as beams (20+ foot spans) for a tree house deck which I will then set atop a geodesic dome. I am in the designing stage and have the following questions. I am hoping someone can direct me to the answers!
1. What is the allowable bending stress for a western red cedar or Douglas Fir (Coast-type) log used as a beam.
2. What is the max. allowable deflection for the above trees ?
3. Does anyone know where to find information about how to make the following connection: A cut tree at say 10’ used as a column supporting a log beam?
Thanks,
L