AWS EDITION 1, 2009

160

© 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 7 of 16)

PRODUCT

MATERIAL, MACHINING, AND ASSEMBLY RULES (continued)

DESCRIPTION E C P



4.2

M A T E R I A L

MATERIAL (continued)



4.2.12

At EXPOSED SURFACES (continued)



4.2.12.7

For TRANSPARENT FINISH (continued)

4.2.12.7.10 Have visible panel EDGES, REVEALS, and/or SPLINES, when appropriate, that are:

4.2.12.7.10.1 Full length.

4.2.12.7.10.2 MILL-OPTION. M

4.2.12.7.10.3 MATCH species of panel face. MM

4.2.12.7.10.4 COMPATIBLE for color and grain. M

4.2.12.7.10.5 WELL-MATCHED for color and grain. M

4.2.12.7.10.6 A minimum of 0.020" (0.5 mm) nominal precludes show-through of core. THICKNESS that MM

4.2.13 At SEMI-EXPOSED SURFACES:

4.2.13.1 For OPAQUE finish, permits natural and manufacturing defects, provided the surface is filled solid.

4.2.14 At CONCEALED SURFACES:

4.2.14.1 Permits defects such as voids, wane, or unfilled knots.

4.2.14.2 Requires blocking or shims to be of a compatible material.

4.2.15 At BOXED or CURB STRINGERS, shall be of two or more members.

4.2.16 At STRINGER TURNOUTS, including quarter turns, half turns, and the like, shall be of laminated or veneered

face construction, and:

4.2.16.1 Where feasible, such turns shall be a continuous part of the straight stringer.

4.2.17 At HANDRAILS, GUARD RAILS, NEWEL POSTS, and BALUSTERS can be glued up.

4.2.18 At RISERS, bull-nosed or radius, shall be veneered construction with one piece face.

4.2.19 When FACTORY FINISHING is specified, concealed surfaces shall be factory sealed with one coat

at 1 mil dry. MM

4.3

M A C H I N I N G 

MACHINING of:

4.3.1

E X P O S E D S U R F A C E 

EXPOSED SURFACES shall comply with:

4.3.1.1

S M O O T H N S S 

SMOOTHNESS REQUIREMENTS (see Item 7.1 in COMPLIANCE) at:

4.3.1.1.1 SHARP EDGES to be eased with fine abrasive. MM

4.3.1.1.2 TOP FLAT WOOD surfaces; those that can be sanded with a drum or wide belt sander:

4.3.1.1.2.1 Minimum 15 KCPI or 100-grit sanding M

4.3.1.1.2.2 120-grit sanding M

4.3.1.1.2.3 150-grit sanding M

4.3.1.1.3 PROFILED and SHAPED WOOD surfaces:

4.3.1.1.3.1 Minimum 15 KCPI or 100-grit sanding M

4.3.1.1.3.2 Minimum 20 KCPI or 120-grit sanding M

4.3.1.1.3.3 120-grit sanding M

4.3.1.1.4 TURNED WOOD surfaces:

4.3.1.1.4.1 Minimum 15 KCPI or 100-grit sanding M

4.3.1.1.4.2 120-grit sanding M

4.3.1.1.4.3 180-grit sanding M

4.3.1.1.5 CROSS-SANDING, excluding turned surfaces:

4.3.1.1.5.1 Is not a defect. M

4.3.1.1.5.2 Is not allowed. MM

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