Concrete Fences for Dummies
Steaming is usually used for Southern Pine poles, on the other hand Douglas Fir poles treated with waterborne preservatives also could be steamed. Douglas Fir is often Boultonized, the place the retort is pressurized as well as preservative is heated to 180 degrees to 220 degrees F.In This method, the high-power metal wires & stands or metal tendon