MIL-STD-107J
requirements, the equipment shall be covered with flexible, weatherproof barrier material conforming to class E of PPP-B-1055 or approved commercial plastic material. Polyvinyl chloride (PVC) or ethylene vinyl acetate (EVA) shall not be used as wrap, shroud, or cover material due to the possible corrosive effects of PVC and EVA vapors on the covered items and its components parts. All covers shall be of sufficient strength and secured in a manner to adequately protect the equipment throughout the transit period. Covers constructed of waterproof paper shall not be used. All sharp corners and projections shall be padded with
polyethylene foam or cushioned material before covering. Covers shall be draped in a manner to completely cover the item and shall be arranged to avoid the formation of water pockets. Tarp seams shall be sealed with water-resistant adhesive conforming to MMM-A-260.
5.9.1.1 Shipping covers for CNC units. All CNC units shall be protected from the environment by enclosing the units in weatherproofed bags manufactured from material conforming to MIL-PRF-81705 or class E of PPP-B-1055. Seams shall either be heat-sealed or closed with tape conforming to ASTM D 5486/D 5486M.
5.9.2 Transportation mode. Except for shipment of delicate equipment such as computer numerical control units and other fragile items, IPE may be shipped by motor carrier, ship or air transportation as specified by the shipping activity. Unless a waiver is obtained, rail shipment is not authorized. Regardless of the mode of transportation used, the equipment shall be processed, loaded, protected, and shipped in a manner that will protect the equipment to the maximum extent possible. The motor carrier shall comply with Title 23 CFR, Chapters I and II, and Title 49 CFR, Chapter III.
5.9.2.1 Transportation mode for CNC equipment. CNC units, accessories, attachments, components, and other fragile items or assemblies shall be shipped in air ride vans only.
5.9.2.2 Waiver of transportation mode. When it is determined to be in the best interest to the Government to relax the transportation mode, a written request for waiver shall be provided
to the Defense Supply Center Richmond, ATTN: DSCR-VBD, 8000 Jefferson Davis Highway, Richmond VA 23297-5610.
5.10 Storage. Machines mounted on wooden skids may be subjected to abnormal
structural loads created by warpage of skid components under variable relative humidity conditions and temperature changes during storage. These structural loads can distort precision machinery
and in extreme cases cause structural damage. After a machine has been placed in storage, the machine hold-down bolts shall be loosened a minimum of one-half inch from the base. The bolts shall be coated with preservative compound conforming to grade 2 and 4 of MIL-PRF-16173. Other machine-to-skid retention devices shall be similarly adjusted. Machines mounted on DoD reusable skids do not require loosening of the hold-down bolts or other retention devices. Each machine placed in storage with hold-down bolts loosened shall have a plain manila tag secured to each unit in a conspicuous location. Tag shall be stamped in red ink with the following statement: "MACHINE MOUNTING BOLTS LOOSENED-DO NOT MOVE UNTIL BOLTS ARE TIGHTENED." The machine-to-skid retention devices, whatever their configuration, shall be properly tightened and secured prior to movement of equipment.
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