Skip to main content

AWI and SMA release ANSI-approved stair standard


The Architectural Woodwork Institute (AWI) and the Stairbuilders and Manufacturers Association (SMA) announce the release of ANSI/AWI SMA 0643-2021 Wood Stair, Handrail, and Guard Systems Standard which was approved on Mar. 1 by the American National Standards Institute (ANSI).

The standard is vailable online for free access at and and will take effect Aug. 15.

ANSI/AWI SMA 0643 supersedes, replaces, and supplants Section 7 of Architectural Woodwork Standards, Edition 2 (2014) as the most current version of the AWI Standard for wood stair, handrail and guard systems. It is the first standard of its kind for SMA.

ANSI/AWI SMA 0643-2021 provides standards and tolerances for the quality fabrication and field installation of wood stair, handrail, and guard systems, that are comprised of: stairs, which encompass stringers, risers, treads and landings; handrails; and guard systems, which are part of the assembly of stairway components. Further, it addresses common guard infill systems of glass and metal, and establishes minimum aesthetic tolerances and performance requirements intended to provide a well-defined degree of control over a project's quality of materials, workmanship, and/or fabrication.

Related Articles

AWI & SMA releases new stair standard

The Architectural Woodwork Institute and the Stairbuilders and Manufacturers Association have announced that the AWI SMA 0643 – Wood Stair, Handrail, and Guard Systems Standard has been completed by the SMA Quality Standards Committee.

ANSI approves finish carpentry installation standard

The American National Standards Institute recently approved the AWI 0620 – Finish Carpentry Installation Standard, a first of many in the upcoming suite of new architectural woodwork standards.


New NAAWS standard released

A revised edition of the North American Architectural Woodwork Standards, NAAWS 4.0, was released on May 31 by the Woodwork Institute and the Architectural Woodwork Manufacturers Association of Canada.

SMA logo

SMA offers Stair Balustrade class

The Stairbuilders and Manufacturers Association’s Stair Academy will present a Stair Balustrade class June 13-15 in Smyrna, Ga.

A) AWI Logo

AWI seeks comments on proposed standard

The Architectural Woodwork Institute invites public comments on its proposed Manufactured Wood Casework standard (AWI 1232) through Oct. 11.


AWI developing new standards

The Architectural Woodwork Institute is developing 12 woodworking standards through an American National Standards Institute-approved process on a three-year schedule.

AWI creating new architectural woodwork standards

The Architectural Woodwork Institute is in the process of creating a new suite of standards for architectural woodwork. The creation of these standards, which is expected to continue for the next three years, will define and address each aspect of architectural woodwork, according to the organization.