scope:

The basic design and construction requirements for permanent wood foundation (PWF) systems are set forth in this Permanent Wood Foundation Design Specification. Criteria for materials, preservative treatment, soil characteristics, environmental control, design loads, and structural design are included. Where requirements are based on nationally recognized standards and specifications, these standards and specifications are referenced without elaboration.

This Specification is not intended to preclude the use of materials, assemblies, structures, or designs not meeting the criteria herein, where it is demonstrated by analysis based on recognized theory, full scale or prototype loading tests, studies of model analogues, or extensive experience in use that the material, assembly, structure, or design will perform satisfactorily in its intended use.