I have thousands of years experience. about 60 of my own, maybe another 60 of those that taught me, and those that taught them etc.etc. Framing contractor and G C for 30. Supervised and taught one 4 family and one 8 family group to build their own houses working for Farmers Home Administration Self Help Housing program. worked for residential, commercial, and light industrial. But I am a carpenter, probably have sawdust in my blood. But if you own a tank I was a tracked vehicle mechanic/ wrecker operator in the Army. We repair movable fox holes.