b.
Floors. Battery charging rooms and rooms containing acid cleansing
solutions shall have acid-resistant floor finishes and bases. A 10-foot by
10-foot level and smooth surface shall be provided in antenna repair work
areas of air station GEM shops. A floor-level foundation shall be provided for
mounting a tactical air navigation (TACAN) antenna.
c.
Doors. Special size doors are required to facilitate the movement
and handling of equipment. The electronics and antenna repair areas shall have
25-foot wide by 35-foot high, mechanically operated, rolling industrial doors.
Mobile equipment repair bays of air station GEM shops shall have 12-foot wide
by 14-foot high overhead doors. With the exception of air station GEM shops,
other shops shall have doors wide enough to accommodate tractor-trailer trucks
and high enough for vehicles carrying antennas. All exterior doors shall be
insulated and weatherstripped.
d.
Roof. Where required, the roof shall be designed for antenna
mounts, loadings, and handling rooms. Roof walkways or safety coverings shall
be provided at access ladders, hatches, and roof trafficways.
e.
Ceiling Heights. Special ceiling heights are required in some
spaces as follows:
(1) Forty-foot clearance where the testing of rotating antennas
takes place.
(2) Ten-foot clearance in air station GEM shop antenna work areas.
(3) Fifteen feet in mobile equipment repair bays.
f.
Soundproofing. Soundproofing shall be provided in teletype rooms
and at office core perimeters in accordance with NAVFAC DM-l, Chapter 3, Sect
ion 4 and NAVFAC DM-3.10.
9.
Shielding. Rooms for calibrating test equipment and meters shall
be completely shielded with copper screening or shall be prefabricated as
specified in NAVFAC Guide Specification NFGS(TS)-13765, Radio Frequency
Shielded Enclosures, Demountable Type.
4.
MECHANICAL REQUIREMENTS.
a.
Heating and Air Conditioning. Heating and air conditioning shall
be provided in accordance with NAVFAC DM-3.3. Constant temperature and
humidity control shall be provided in a dust-free atmosphere in spaces for
repair, testing, and calibration of equipment. Where a clean room atmosphere
is required, clean rooms and/or clean benches shall be provided in accordance
with Environmental Control-Design of Clean Rooms, NAVFAC DM-28.5.
b.
Ventilation. Mechanical ventilation systems with makeup air as
required shall be provided for cleaning and degreasing areas, cleaning vats
containing toxic chemicals, rooms containing acids, sandblast rooms, and paint
spray booths in accordance with NAVFAC DM-3.3. Ventilation for paint spray
booths shall also meet the requirements in NFPA 33.
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