A-A-52032B
2.3.3 Side walls and end walls. The steel side walls and end walls may be of the interior or exterior post type, corrugated or of smooth skin construction. The end walls and side walls shall withstand loading in accordance with ISO 1496/1, except each end wall shall withstand an internal loading equal to the full payload uniformly distributed over the surface of the end wall.
2.3.4 Floor. The floor shall be fabricated of 3/4 in. (1.9 cm) hardwood or marine grade plywood. A maximum of six sheets of marine grade plywood shall be used. The floor shall be attached to the crossmembers by countersunk fasteners, 1/4 in. minimum shank diameter, either of the self-tapping screw type, or machine screws with self-locking nuts and shall be installed so that each head is 0 to 1/16 in. (1.6 millimeters (mm)) below the board surface and at least 1 in. (2.54 cm) from the board edge. The floor boards shall be attached to each crossmember by means of at least three fasteners per board, for boards equal to or over 7 in. (17.8 cm) wide, and two fasteners per board, per crossmember, for boards less than 7 in. wide. Fasteners shall not exceed 10 in. (25.4 cm) center to center distance. The floor shall be installed to permit lateral variations in floor board width due to swelling. The floor shall be watertight. All wood components shall be chemically treated in accordance with the regulations as stated by the Commonwealth of Australia Department of Health (see 7.2.8), or equivalent. A data plate shall be affixed to the container indicating the immunization code used in the treating process.
2.3.5 Understructure. After painting of the metal surfaces, the entire underside of the container floor, including floor boards, crossmembers, corner fittings, side rails, and end frame members, shall be coated with a bituminous undercoat applied to a minimum dry film thickness of 6 mils (150 microns).
2.3.6 Bottom rail protection. An open recess shall be provided for protection against damage of the bottom side rails and bottom end rails in the vicinity of the bottom corner fittings or optional equivalent construction that meets all performance requirements. The open recesses shall be a minimum of 2 in. (5.08 cm) in height by 6 in. (15.2 cm) in length.
2.3.7 Forklift pockets. Optional forklift pockets for handling loaded and unloaded containers shall be furnished if specified in contract or purchase order (see 7.1). Forklift pockets shall conform to the requirements of ISO 1496/1, Annex C. Above the inside of the "unload pockets", the following warning shall be letter stenciled or letter decals in minimum 3 in. (7.6 cm) letters:
"EMPTY LIFT ONLY"
2.3.8 Roof. The roof shall be of corrugated construction, self-draining and shall conform to ISO 1496/1 (see 7.2.4). A reinforced zone shall be provided for protection of the roof against damage in the vicinity of the top corner fittings. The reinforced zone shall extend a minimum of
18 in. (45.7 cm) from the outside faces of each top corner fitting. The metal thickness of the reinforced zone shall be 1/4-in. Optional construction that meets all performance requirements is acceptable with the approval of the Contracting Officer.
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