UFC 4-211-02N
10 January 2005
including change 3, 13 April 2007
air system, critical component failure, etc. should be monitored by the building
automated control system. All critical alarms, notifications and status points shall
also be indicated on a control panel either within the hangar or at an operator
monitoring station. Consider that /2/ ventilation system should \ possibly /2/
maintain a slightly positive static pressure of 1.25 mm (0.05 in.) water gage
between the hangar area and the exterior to avoid infiltration of contaminants into
the hangar space that can affect painting operations. However, some studies
indicate that a slightly negative pressure in the area provides for more superior
painting and reduces turbulent flow in the areas that should be addressed.
(Refer to System-Level Computational Fluid Dynamics: Advanced CFD Tools to
Solve Problems of Operational Conditions, States of Large-Scale Engineered
and Natural Systems for additional guidance.) /2/ Maintain a slightly higher
pressure in the adjacent ancillary spaces and overhead ceiling spaces than in the
hangar area to keep the hazardous fumes given off by stripping agents from
infiltrating into these spaces. Ventilate the space above the hangar bay ceiling to
provide a non-hazardous space for light fixtures.
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 \ MERV 5 or better
/2/ on the basis of \ ASHRAE 52.2, Method of Testing General Ventilation Air-
meet the requirements for the 3 part system per NESHAP. /2/ Determine the
type of exhaust filter system by an analysis of environmental control regulations
at the site \ for additional requirements. If air recirculation systems are
considered, additional filtering may be required. Refer to the AFRL for further
information./2/
Install visual gauges, audible alarms, or pressure activated devices on filters to
ensure that the air velocity is maintained. Provide exhaust ventilation from the
floor level for the paint mixing and storage rooms. \ Refer to ACGIH IV manual
VS-75-30. Also, paint mixing can be done on ventilated benches. Refer to UFC
3-410-04N. /2/ Provide ventilation systems for paint mixing and paint equipment-
cleaning rooms in accordance 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.
\ Consider recirculation of airflow per NPFA-33 and ANSI Z9.7 and refer to
Guidance found in the AFRL. See Appendix D for OSHA interpretations. /2/
2-4.3
Plumbing.
Provide plumbing in accordance with UFC 3-420-01, Plumbing Systems and as
follows:
a. Provide toilet and shower facilities for both sexes.
13
Previous Page
