AWS EDITION 1, 2009

© 2009, AWI, AWMAC, WI - Architectural Woodwork Standards - 1st Edition, October 1, 2009 63

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

Section 3 - Lumber (Page 14 of 18)

PRODUCT

LUMBER RULES (continued)

These rules are not intended to create a lumber grade; they are only intended to establish the acceptable requirements

and/or characteristics after the architectural woodwork is completed or installed.

DESCRIPTION E C P

4.2b

S O F T W O O D 

MATERIAL - SOFTWOOD

4.2b.1 Rules shall apply only to the following species:

CEDAR, WESTERN RED HEMLOCK PINE, SUGAR

FIR, DOUGLAS PINE, PONDEROSA REDWOOD

4.2b.1.1

For SPECIES NOT LISTED, length requirements and size/exposed area of permitted natural

characteristics shall be as agreed to between owner/design professional and manufacturer/

installer.

4.2b.2 GLUING for width is permitted when finished dimensions exceed 7" (178 mm).

4.2b.2.1 Direction of the end grain of boards glued for width shall be alternated.

4.2b.2.2

4.2b.3 GLUING for thickness is permitted when finished dimensions exceed 1-1/2" (38 mm).

4.2b.4 VERTICAL GRAIN shall have a minimum average of 5 growth rings per inch at exposed surfaces.

4.2b.5

L E N G T H S

MAXIMUM LENGTH REQUIREMENT for given width up to 1-1/2" (38.1 mm) in thickness shall be:

4.2b.5.1 DOUGLAS FIR, HEMLOCK, & WESTERN RED CEDAR

4.2b.5.1.1 4" to 8" (102 mm to 203 mm) in width = 15'-8" (4752 mm)

4.2b.5.1.2 10" (254 mm) in width = 13'-8" (4170 mm)

4.2b.5.1.3 12" (305 mm) is not usually available.

4.2b.5.2 PONDEROSA or SUGAR PINE

4.2b.5.2.1 4" to 12" (102 mm to 305 mm) in width = 15'-8" (4752 mm)

4.2b.5.3 REDWOOD

4.2b.5.3.1 4" to 12" (102 mm to 305 mm) in width = 19'-8" (5994 mm)

4.2b.5.4 BOARDS required to be WIDER than those listed above may be glued for width.

4.2b.5.5 BOARDSin two pieces for length at the option of the manufacturer. required to be LONGER than those listed as available above may be glued or furnished

4.2b.6

O P A Q U E 

OPAQUE FINISH

4.2b.6.1 NATURAL CHARACTERISTICScoats of finish are applied. are allowed only provided they are inconspicuous after two

4.2b.6.2 FILLINGmanufacturer. of checks, splits, or other open characteristics is the responsibility of the millwork

4.2b.6.3



NATURAL CHARACTERISTIC LIMITATIONS of any one board's exposed face:

4.2b.6.3.1 NONE in any face smaller than 200 square inches

(5080 square mm), with:

M

4.2b.6.3.1.1 ONE permitted for each additional 100 square

inches (2540 square mm)

M

4.2b.6.3.1.2 A maximum of FIVE M

4.2b.6.3.1.3

NO knots, pitch streaks, or pitch pockets within 18"

(457 mm) of one another M

3