The Permanent Wood Foundation (PWF) is an innovative building system that saves builders time and creates comfortable, warm living areas that enhance a home's saleability. Just what exactly is a Permanent Wood Foundation? It's a load-bearing lumber-framed foundation wall sheathed with plywood. All lumber and plywood components in the wood foundation are pressure-treated with preservatives to withstand decay from moisture and insect damage. The PWF is an engineered foundation construction system. The engineering design analysis was developed jointly by the U.S. Department of Agriculture's Forest Service, the American Forest & Paper Association(AF&PA), and the American Wood Preservers Institute(AWPI), with field evaluations by the National Association of Home Builders Research Foundation, Inc. Topics: • Introduction to Permanent Wood Foundations (PWF) • Site Considerations • Elements of the PWF System • PWF Installation Procedures • PWF Applications • Uses with Crawl Space Foundations • Uses with Basement Foundations • Other PWF Applications • Related Systems • Various related Details and Sectional Drawings