Stairbuilders and Manufacturers Association AWI SMA Standard.

Proposed American National Standard:  

AWI  SMA 0643 – Wood Stair, Handrail and Guard Systems 

The Architectural Woodwork Institute (AWI) and Stairbuilders and Manufacturers Association (SMA) have collaborated to develop the ANS APPROVED AWI SMA 0643 – Wood Stair, Handrail, and Guard Systems standard. The standard differentiates between structural and aesthetic requirements for stair systems, ensuring that industry professionals can tailor the product to their specific needs. The AWI SMA 0643 – Wood Stair, Handrail, and Guard Systems standard includes a separate installation section, to be used by stair system installers in the field.


The standard copy will soon be avaiable here for your review and use.

Public Comment Form

To make public comments on the Proposed American National Standard AWI SMA 0643 – Wood Stair, Handrail, and Guard Systems draft, please use the Public Comment Form. This form is the only venue through which AWI and SMA will be accepting public comments.

Please make sure that any comments are in reference to the most recent revision of the draft (available on this page) and no other revision, as content and references will not remain constant with the development of each new draft.

SMA Glossary of Stair Terms


MSU Design Values Report Summary


Design Values for Domestic Wood Species Used in Stairway Construction


Physical and Mechanical Properties of Clear Wood from Red Oak and White Oak


SMA Visual Interpretations of the Stairbuilding Codes.

Visual Interpretations are the key to understanding, visualizing, and keeping stairbuilders and lay people informed of ever-evolving technical concepts. The SMA offers the most up-to-date manuals for stairbuilders to construct safe, functional, and beautiful stair designs that adhere to industry requirements, while supporting the architectural and design goals of the project. These invaluable guides are perfect for visualizing the most basic to the most complex of designs.

The Architectural Woodwork Institute has produced and collaborated on the development of standards in accordance with its mission from its founding in 1953 to the present day.

Stairbuilders and Manufacturers Association was formed in 1988 to insure the growth and prosperity of the group’s industry and craft. SMA Mission is: Building the greatest resource of knowledge and tools contributing to the success of our members and the stair industry.

Founded in 1918, the American National Standards Institute (ANSI) is a private non-profit organization that administers and coordinates the U.S. voluntary standardization and conformity assessment system.

Keep up to date with all of the latest code changes and design inspirations. No membership required.

Become a Member.

Membership in the SMA is an invaluable resource that allows stair industry professionals of every type to advance their careers through networking, engaging in continuing education, keeping up with changes within the industry, and accessing new products.