A-A-52520B
2.4.6 Secondary hardwood. Fabricated wood components shall be free from the following characteristics or imperfections to the extent that they shall not decrease the strength or serviceability or be otherwise detrimental to the required service of the component.
Burls.
Season checks.
Sound stain or discoloration.
Sound streaks.
Small, sound, tight knots or small open knots.
Short splits.
Bark streaks and pockets.
Wormholes, except buckshot wormholes in clusters.
Bird peck.
Bird's-eye.
Slight vane on small pieces and medium vane on large pieces.
Slight variation in thickness.
Small end checks.
Slight honeycomb.
Occasional torn grain.
Occasional rough or hit-and miss surfacing.
Other definitely minor imperfections.
2.5 Design and construction. Design and construction of floorboards and platforms shall conform to the applicable drawings and data supplied by the procuring activity (see 6.2).
2.5.1 Quality impairment. Defects in wood components (see 2.4) shall not impair the quality of the fitting of hardware, and when practicable shall not be located on the normally visible surface of the assembled body. No knot split or similar defect shall be permitted at a bolt, nail, screw, mortise, or notch, where it may impair the strength and serviceability of the component.
2.6 Identification and marking. Unless otherwise specified in applicable engineering drawings (AEDs), identification and marking of the lumber shall be permanent and legible and shall include, as a minimum, the AED part number, the manufacturer's CAGE code and date of manufacture (month and year) so that after assembly their identification marks shall be located on the top surface and 15.2 cm (6 inches) from the front end of the component.
3. REGULATORY REQUIREMENTS. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal acquisition Regulation (FAR).
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