AWS EDITION 1, 2009

185

© 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 8 - Wall Surfacing (Page 14 of 32)

PRODUCT

MATERIAL, MACHINING, AND ASSEMBLY RULES (continued)

DESCRIPTION E C P

4.2

M A T E R I A L 

MATERIAL

4.2.1 Shall be lumber or sheet products of the species and Grade specified.

4.2.2 Shall conform in finish width, thickness, and length of lumber to Section 3.

4.2.3 Shall not have defects, either natural or manufactured, that exceed those permitted.

4.2.4 Requires plain-sawn lumber.

4.2.5 Permits defects, both natural and manufactured, if covered by adjoining members or otherwise concealed when

installed.

4.2.6 States figure is not a function of a species grade and must be specified in the contract document.

4.2.7 Permits warp that can be held flat and straight with normal attachment.

4.2.8

E X P O S E D

At EXPOSED SURFACES:

4.2.8.1 Requires end grain to be kept to a minimum. MM

4.2.8.2

Requires ends to be self-returned with no end grain showing.

M

4.2.8.3 Permits medium-density fiberboard (MDF) for opaque finish.

4.2.8.4 For TRANSPARENT FINISH

4.2.8.4.1 Permits hardwood or softwood.

4.2.8.4.2 Permits only one species for the entire project. MM

4.2.8.4.3 Adjacent veneer and lumber shall be:

4.2.8.4.3.1 Mill-option species. M

4.2.8.4.3.2 Compatible for color and grain. M

4.2.8.4.3.3 Well-matched for color and grain. M

4.2.9 At SEMI-EXPOSED SURFACES:

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

4.2.10 At CONCEALED SURFACES permits defects, such as voids, wane, or unfilled knots.

4.2.11

W O O D V E N E E R 

At WOOD-VENEER wall surfacing requires:

4.2.11.1

C

O

R

E

S

CORES of particleboard or medium-density fiberboard (MDF) shall be:

4.2.11.1.1 A minimum of 1/4" (6.4 mm) in thickness. M

4.2.11.1.2 A minimum of 7/16" (11.1 mm) in thickness. M

4.2.11.1.3 A minimum of 11/16" (17.5 mm) in thickness. M

4.2.11.1.4

FIRE-RATED, when specified, a minimum of 3/8” (9.5 mm) in thickness with a Class I

Rating.

4.2.11.2

MATCHING, such as book-match-and-end match, slip-match-and-end-match, or special sketch

faces, to be so specified and detailed.

4.2.11.3

O P A Q U E 

For OPAQUE finish, face shall:

4.2.11.3.1 NOT require the selection of color and/or grain.

4.2.11.3.2 PERMIT the use of paint-grade hardwood, medium-density fiberboard (MDF), or

medium-density overlay (MDO).

4.2.11.3.2.1 If MDF is used, edgebanding is not required.

4.2.11.3.3 Permit mill option of veneer slicing.

4.2.11.3.4 NOT require matching of veneer leaves.

4.2.11.3.5 NOT require matching of adjacent panels.

8