MIL-HDBK-1028/1C
the hangar bay ceiling to provide a nonhazardous space for light
fixtures.
Note: The NAVFACENGCOM Criteria Office and NFESC, Naval
Occupational Safety and Health (NAVOSH) Branch recently reduced
Department of the Navy Deputy for Environmental Affairs
interpretation of paint spray booth definition. Contact
NAVFACENGCOM Criteria Office prior to initiating final design.
Filters throughout should be made from noncombustible
materials and should meet approval of the fire protection
authorities. Filters upstream of the supply fan and filters in
the door plenum should have an efficiency of 30 percent on the
basis of ASHRAE 52.1, Gravimetric and Dust-Spot Procedures for
Testing Air-Cleaning Devices Used in General Ventilation for
Removing Particulate Matter. Filters in the exhaust wall should
have an efficiency of 12 percent paint arresting pre-filter plus
60 percent. The type of exhaust filter system should be
determined by an analysis of environmental control regulations
at the site. The use of air-assisted, air less, or
electrostatic paint spray methods versus conventional air
atomization is recommended to reduce overspray and increase
exhaust filter life. Visual gauges, audible alarms, or pressure
activated devices should be installed on filters to ensure that
the air velocity is maintained. Exhaust ventilation from the
floor level should be provided for the paint mixing and storage
rooms at the rate of 0.00047 cubic meter/s (1 cfm) per .093
square meter (1 sf) of floor area up to a maximum of 0.071 cubic
meter/s (150 cfm). The ventilation systems for paint mixing and
with NFPA 33 and the ACGIH Industrial Ventilation, a Manual of
Recommended Practices. Consider heat recovery in the
ventilation system for those spaces. Exhaust stacks should be
the "no loss" type as shown in ACGIH Industrial Ventilation, a
Manual of Recommended Practices.
3.4.3
Plumbing. Plumbing should be provided in accordance
with NAVFAC DM-3.01 and as follows:
a)
Provide toilet and shower facilities for both sexes.
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