New Guide Published for Raised Wood Floor Foundations

Originally published by: Southern Forest Products AssociationSeptember 14, 2017

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“Raised Wood Floor Foundations – Design & Construction Guide” is now available; click here to review a copy. This 16-page publication is aimed at homebuilders, architects, engineers and specifiers. It explains how to build to a higher standard, outlining the many advantages offered by building a wood floor system above grade, including long-term durability and trouble-free performance. Enhanced curb appeal and energy efficiency are added features. 

An introductory section covers site conditions, soil properties, design considerations and connections. Five pages are devoted to detailed three-dimensional illustrations that explain various foundation configurations: pier and beam and continuous stemwall construction on a variety of footings. Eight tables provide floor framing allowable loads for girders using SP dimension lumber, glulam, nail-laminated lumber or LVL and maximum joist spans using SP lumber, trusses or wood I-joists. Allowable live loads for plywood and OSB sheathing are also listed. Closed crawlspaces, moisture management and insulation topics are addressed, along with ten cost-saving strategies.

“Here is a concise and very helpful guide to the workings of a raised wood floor foundation system, with options to meet various site and soil conditions,” explained SFPA’s Richard Wallace, vice president of communications. “This booklet will become a timely tool as rebuilding gets underway in flood-ravaged areas,” he added. 

This new edition replaces the original 48-page manual developed by SFPA in 2004 when the association’s Raised Floor Living promotional campaign was launched.