AWS EDITION 1, 2009

310

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© 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/

PRODUCT

MATERIAL, MACHINING, AND ASSEMBLY RULES (continued)

DESCRIPTION E C P



4.4

A S S E M B L Y 

ASSEMBLY (continued)



4.4.15

H

P

D

L

At HPDL: (continued)



4.4.15.8

FIRE-RATED countertops require (continued)

4.4.15.8.1 Minimum CUSTOM GRADE conformance.

4.4.15.8.2 ADHESIVE be rigid set, Class I Fire-Rated.

4.4.15.9 SELF-EDGE:

4.4.15.9.1 Permits self-edge applied after top laminate. MM

4.4.15.9.2 Requires self-edge to be applied before top laminate. M

4.4.15.10 JOINTS:

4.4.15.10.1

At L-shaped WOOD GRAIN or DIRECTIONAL PATTERN tops shall have an

approximate 45º diagonal joint; butt joints are not permitted.

4.4.15.10.2 INSTALLATION JOINTS shall be fit tight and flush with the use of splines, dowels, or

biscuits for alignment, and:

4.4.15.10.2.1

Be securely fastened with draw-bolt-type mechanical fasteners, if

practical.

4.4.15.11 BOTTOM of edging and its build-up shall be free of dents, torn grain, glue, etc., and sanded smooth

with all sharp edges removed.

4.4.15.12 BUILT-UP MEMBERS shall be of acceptable core material with backing sheet

applied, or: MM

4.4.15.12.1 The use of moisture-resistant core or a color-coded, water-resistant

sealer may be substituted for backing sheet.

MM

4.4.15.13 BACK SPLASHES require end splashes at wall ends. MM

4.4.15.14 At ASSEMBLY 1 (wall mount) BACK- and END-SPLASH construction, and:

4.4.15.14.1 TOP edge to be banded.

4.4.15.14.2 FRONT edge of end splash to be banded.

4.4.15.14.3 Splash MEMBERS to be bundled and shipped loose to project.

4.4.15.14.4 MECHANICAL FASTENERS are required between splash members and

deck.

M

4.4.15.15 At ASSEMBLY 2 (deck mount) BACK- and END-SPLASH construction, and:

4.4.15.15.1

RAW CORE at joint between the countertop deck and end splash or butt joint-applied

back splash shall be sealed before assembly.

4.4.15.15.2 END SPLASHES at cove or butt back splashes shall be butt-jointed and securely

attached with mechanical fasteners, and:

4.4.15.15.2.1 Mechanical fasteners are not required at wall or cabinet abutments that are not as deep as the countertop return.

4.4.15.15.2.2 Shall be CAULKED with clear or compatible color waterproof caulking

so as to leave a visual bead not exceeding 1/8” (3.2 mm).

4.4.15.15.3 SCRIBE ALLOWANCE shall be provided, as appropriate, and:

4.4.15.15.3.1 UNBACKED SCRIBE SPANand back walls. shall not exceed 1/2” (12.7 mm) at ends

4.4.15.16 FINISHED END CAPS may be applied after top laminate.

4.4.15.17 CANTILEVER, with or without a sub-top, shall not exceed 12” (305 mm) from a support, whether in

the front, back, or end.

4.4.15.18 REMOVABLE COMPONENTS shall be attached with flat-head screws, set flush, and:

4.4.15.18.1 If CHEMICAL RESISTANCE is required, the screws shall be stainless steel.

Section 11 - Countertops (Page 15 of 25)

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