Design Solutions - Fall 2021 - 53

New Standard 0643 is the result
of a collaborative effort drawing from
the expertise of the AWI Technical
Committee and SMA's Quality
Standards Committee in conformance
with AWI's approved ANSI process.
Work commenced in 2016, and is the
first stair, handrail and guard systems
standard that followed the ANSI-required
open consensus development process.
AWI is an ANSI-accredited Standards
Developer Organization (SDO).
Past versions ofArchitectural
Woodwork Standards, 2nd Ed.
2014 (AWS2) provided specification
guidance, requirements and illustrations
for Wood Stairs and Handrails in
Section 7. The new ANSI/AWI SMA
0643 now supersedes, replaces, and
supplants Section 7 of the AWS2 as
the most comprehensive version of the
AWI Standard for wood stair, handrail
and guard systems to date. It is the first
Standard of its kind for SMA.
FABRICATION AND
INSTALLATION
ANSI/AWI SMA 0643 provides
standards and tolerances for
the quality fabrication and field
installation of wood stair, handrail,
and guard systems. Advances in the
new standard now include common
guard infill systems of glass, metal
and cable, 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.
These newly included aspects of the
standards reach beyond the traditional
components of wood stair assemblies
which encompass stringers, risers,
treads and landings; handrails; and
guard systems.
New 0643 Standard includes
sections on shop and field fabrication
and additional materials that were
not previously covered in the AWS2.
Performance Duty Levels are not part
of the standard but, it does include
a structural section referencing
the International Code Council's
International Building Code and
International Residential Code.
Standards are meant to protect
all parties and as such, the new
standard is relatable in more parts of
the world. The forward indicates that
individuals within the industry will
use this standard to maintain a high
degree of control over the aesthetic
quality and the structural integrity of
their work, ensuring that potential
differentiations in the workmanship and
implementation of projects are made
uniform. Wherever stair standards users
are, dimensions and tolerances in the
standard are shown in metric followed
by the US Customary System of
measurements or Standard Imperial (SI)
in brackets. The measurement system
used for verification of compliance shall
be that which is represented in the
original contract documents.
fall 2021 I designsolutions
53

Design Solutions - Fall 2021

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