AWS EDITION 1, 2009

162

© 2009, AWI, AWMAC, WI - Architectural Woodwork Standards - 1st Edition, October 1, 2009

As may be updated by errata at http://www.awinet.org, http://www.awmac.com, or http://www.woodworkinstitute.com/awserrata/

Section 7 - Stairwork & Rails (Page 9 of 16)

PRODUCT

MATERIAL, MACHINING, AND ASSEMBLY RULES (continued)

DESCRIPTION E C P



4.4

A S S E M B L Y 

ASSEMBLY (continued)



4.4.1

J O I N T S 

JOINTS at ASSEMBLED WOODWORK shall (continued)

4.4.1.3 At stringer aprons, fascias, and flat base utilize:

4.4.1.3.1 Clamp nail, biscuit, spline, butterfly, scarf, or dowel joinery. M

4.4.1.3.2 Biscuit, spline, butterfly, scarf, or dowel joinery. M

4.4.1.4 At HANDRAILS:

4.4.1.4.1 Utilize clamp nails or stair bolts. M

4.4.1.4.2 Utilize stair bolts. M

4.4.1.4.3 Utilize stair bolts and dowels. M

4.4.1.4.4 When mitered, utilize screws if stair bolts are impractical.

4.4.1.4.5 Have holes of stair bolts or screws plugged, unless covered by fillet, and:

4.4.1.4.5.1 Plugs shall be compatible for color and grain. M

4.4.1.4.5.2 Plugs shall be well matched for color and grain. M

4.4.1.4.5.3 Grain of plugs shall align with handrail grain. M

4.4.1.5 Be MECHANICALLY FASTENED with nails or screws, where practical, with:

4.4.1.5.1 Fasteners at solid wood countersunk.

4.4.1.5.2 Fasteners at solid wood in molding quirks or reliefs where possible. MM

4.4.1.6 NOT PERMIT fasteners at exposed surfaces of HPDL or overlay sheet products.

4.4.1.7

F L U S H N E S S

Requires FLUSHNESS VARIATIONS at exposed surfaces when mitered or butted (see Test D

illustrations in COMPLIANCE) not to exceed:

4.4.1.7.1 INTERIOR

4.4.1.7.1.1 0.025" (0.6 mm) M

4.4.1.7.1.2 0.005" (0.1 mm) M

4.4.1.7.1.3 0.001" (0.03 mm) M

4.4.1.7.2 EXTERIOR

4.4.1.7.2.1 0.05" (1.3 mm) M

4.4.1.7.2.2 0.025" (0.6 mm) M

4.4.1.7.2.3 0.015" (0.4 mm) M

4.4.1.8

G

A

P

S

Requires GAPS at exposed surfaces when mitered or butted (see Test A illustrations in

COMPLIANCE) not to exceed:

4.4.1.8.1 INTERIOR

4.4.1.8.1.1 0.05" (1.3 mm) wide by 20% of the joint length M

4.4.1.8.1.2 0.025" (0.6 mm) wide by 20% of the joint length M

4.4.1.8.1.3 0.015" (0.4 mm) wide by 20% of the joint length M

4.4.1.8.2 EXTERIOR

4.4.1.8.2.1 0.075" (1.9 mm) wide by 30% of the joint length M

4.4.1.8.2.2 0.05" (1.3 mm) wide by 30% of the joint length M

4.4.1.8.2.3 0.025" (0.6 mm) wide by 30% of the joint length M

4.4.1.9



Requires GAPS at exposed surfaces at parallel members (see Test B illustrations in COMPLIANCE)

not to exceed:

4.4.1.9.1



INTERIOR

4.4.1.9.1.1 0.05" x 8" (1.3 mm x 203 mm) and shall not occur within 48" (1219 mm) of a similar gap M

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