AWS EDITION 1, 2009

58 © 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 3 - Lumber (Page 9 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



4.2a

H A R D W O O D 

MATERIAL - HARDWOOD (continued)



4.2a.10

O P A Q U E 

OPAQUE FINISH (continued)

4.2a.10.4

L I M I T A T I O N S

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

4.2a.10.4.1 NONE in any face smaller than 200 square inches

(5080 square mm), with: M

4.2a.10.4.1.1 ONEinches (2540 square mm) permitted for each additional 100 square M

4.2a.10.4.1.2 A maximum of FIVE in any board M

4.2a.10.4.1.3 NO(452 mm) of one another knots, pitch streaks, or pitch pockets within 18" M

4.2a.10.4.2 NONE in any face smaller than 300 square inches

(7620 square mm), with: M

4.2a.10.4.2.1 ONEinches (3810 square mm) permitted for each additional 150 square M

4.2a.10.4.2.2 A maximum of FOUR in any board M

4.2a.10.4.2.3 NO knots, pitch streaks, or pitch pockets within 24"

(610 mm) of one another

M

4.2a.10.4.3 NONE in any face smaller than 400 square inches

(10160 square mm), with:

M

4.2a.10.4.3.1 ONE permitted for each additional 200 square

inches (5080 square mm)

M

4.2a.10.4.3.2 A maximum of THREE in any board M

4.2a.10.4.3.3

NO knots, pitch streaks, or pitch pockets within 36"

(914 mm) of one another M

4.2a.10.5

A L L O W A N C E S 

NATURAL CHARACTERISTIC ALLOWANCES at interior or exterior use:

4.2a.10.5.1 BARK POCKET - None

4.2a.10.5.2 BIRDSEYE, Sound - Unlimited

4.2a.10.5.3 BIRDSEYE, Checked and Filled - Unlimited

4.2a.10.5.4 BURL, Sound

4.2a.10.5.4.1 < 1" (25 mm) in diameter MM

4.2a.10.5.4.2 < 3/4" (19 mm) in diameter M

4.2a.10.5.5 CHECK, Filled

4.2a.10.5.5.1 < 3/32" (2 mm) wide x 9" (229 mm) long M

4.2a.10.5.5.2 < 1/16" (2 mm) wide x 6" (152 mm) long M

4.2a.10.5.5.3 < 1/32" (1 mm) wide x 4" (102 mm) long M

4.2a.10.5.6 HONEYCOMB - None

4.2a.10.5.7 KNOT, Sound and Tight

4.2a.10.5.7.1 < 1" (25 mm) in diameter M

4.2a.10.5.7.2 < 5/8" (16 mm) in diameter M

4.2a.10.5.7.3 < 3/8" (10 mm) in diameter M

4.2a.10.5.8 KNOT, Checked and Filled

4.2a.10.5.8.1 < 3/4" (19 mm) in diameter M

4.2a.10.5.8.2 < 1/2" (13 mm) in diameter M

4.2a.10.5.8.3 < 1/4" (6 mm) in diameter M

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