NYC 9/11 Public Portal Document
130 Cedar Street July 15, 2004
Carpentry
PART 2.00 - PRODUCTS
9 2.01 WOOD MATERIAL
A. General:
All woods shall be sound flat, straight, well seasoned, thoroughly dry and free
from all defects. Warped or twisted wood shall not be used.
2. For miscellaneous wood blocking, grounds, furring as required, use Utility Grade
Coastal Douglas Fir or Southern Pine, free from knots, shakes, rot or other
defects, straight, square edges and straight grain, air seasoned with maximum
moisture content of nineteen (19) percent. Wood shall be S4S, S-Dry, complying
with PS-20.
3. Plywood for rough carpentry work shall conform to PS-74 and APA standards
best grade for intended use.
4. Plywood for telephone and electric closets, provide 314" thick C-D EXT-APA
plywood, fire retardant treatment as specified herein.
B. Wood Treatment
1. All interior wood material shall be fire retardant treated to comply with the AWPA
standards (C20 for lumber, C27 for plywood) for pressure impregnation with fire
retardant chemical to achieve a flame spread rating of not more than 25 (UL
Class "FR-S" when tested in accordance with UL Test 723 or ASTM E84.
a. After treatment, kiln dry to a moisture content of fifteen (15) percent; if
wood is to be painted or finished, kiln dry to moisture content of twelve
(12) percent. Treatment shall be equal to "Flameproof LHC" made by
Osmose or "Dricon" made by Koppers. Provide UL approve identification
on treated materials.
2. For exterior blocking, roofing and sheet metal, pressure treat wood with water-
borne, "CCA-Oxide": preservative complying with AWPB LP-2 (.23lbsJcubic
foot in chemical wood).
a. After treatment, kiln dry to a maximum moisture content of fifteen (15)
percent. Treatment shall be equal to "Wolmanized" made by Koppers, or
K33 mad by Osmose, or approved equal.
3. Treated wood which is cut or otherwise damaged shall be further treated In
accordance with the APA Standard M-4.
2.02 HARDWARE
A. Rough Hardware for Exterior Use: Hot-dipped galvanized, aluminum or an approved non-
ferrous metal.
B. Nails: Common steel wire, untreated for interior work as per Fed. Spec. FF-N-105.
06200-3
NYC-WTC 000125193
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