How Prestressed Concrete can Save You Time, Stress, and Money.
Steaming is generally employed for Southern Pine poles, however Douglas Fir poles addressed with waterborne preservatives also may be steamed. Douglas Fir is usually Boultonized, where by the retort is pressurized and the preservative is heated to 180 degrees to 220 degrees File.Recycled crushed concrete, being reused as granular fill, is loaded ri