1.8
MAINTENANCE
1.8.1
Hardness Maintenance and Hardness Surveillance (HM/HS) Manual
Submit HEMP HM/HS manual. HM/HS are the combined routine and preventive
maintenance, inspection, test, and repair activities performed on HEMP door
to ensure that HEMP hardness is retained throughout system life cycle of
HEMP shielded door installed under this contract. HEMP shielded door is a
hardness critical item which shall survive day to day use. Consult with
Engineering Service Center, Code 065 before preparation of the HM/HS manual.
1.8.2
Spare Parts
Furnish one set of finger-stock and HEMP shielding gaskets (if door
provided uses finger-stocks and gaskets) for each type, style, and size
hinged HEMP shielded door provided under this contract. Furnish one set of
manufacturer recommended and Contracting Officer approved spare parts for
each HEMP shielded door of each style installed under this contract.
PART 2
PRODUCTS
2.1
HEMP SHIELDED DOOR AND FRAME
Steel conforming to ASTM A 36/A 36M or ASTM A 366/A 366M or ASTM A 568/A
568M or ASTM A 569/A 569M, and be stretcher leveled, and shall be installed
free of mill scale. Metals shall be thicker where indicated or required.
Provide metal thresholds of the type for proper shielding at the floor,
rising not more than 6.35 mm 1/4 inch above finished flooring. Supply
assemblies complete with a rigid structural frame, hinges, latches, and all
parts necessary for operation. Products supplied shall duplicate
assemblies that have been in satisfactory use for not less than [1] [_____]
year. Door frame shall be made of steel and shall be suitable for welding
to surrounding structure and shield. HEMP shielded door shall be
non-sagging, and non-warping. The HEMP shielded door shall provide a
minimum SA of 20 dB greater than minimum requirements per MIL-STD-188-125
when tested in the factory. The door shall have a clear opening of [915]
[_____] mm wide and [2134] [_____] high [36] [_____] inches wide and [84]
[_____] inches high. When the shielded door has knife edge and when it is
exposed to moist air containing salt (near the sea coast), uncontrolled
environment or corrosive environment; knife edge shall be made out of
stainless steel 430 (magnetic type) series. For security reason, locate
controls and locking mechanism inside HEMP space so that unauthorized
personnel cannot tamper.
2.1.1
Pneumatic Type Door
Door and door periphery shall form a continuous conductive continuity seal
by direct metal to metal contact. Continuity seal shall be implemented by
exertion of force from the pneumatic pressure system that shall maintain
adequate sealing pressure on entire face of the independently hung door
panel, sealing each panel to the mating surfaces on the door frame. Door
compartment shall be constructed in a manner such that each door panel
forms an independent shield. Provide factory prepared mating surfaces of
the door and frame to offer a corrosion-resistant, conductive, long-life
finish. Finished area shall form adequate peripheral margin on door panel
and frame. Provide stand-alone, redundant compressed air system to support
the HEMP shielded door. Provide emergency power to compressed air system.
Design the system for fail-safe mode of operation.
SECTION 13095N
Page 10
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