MIL-HDBK 1028/6A
4.2.2.3
Floors. Floors shall be concrete, finished using a wood float
(making certain laitance is removed), and then surface-treated with a
liquid chemical curing-sealing compound.
4.2.2.4
Entrances. The building shall have an entrance at each end
consisting of a pair of flush hollow metal doors. Entrances shall have a
concrete apron raised slightly above the finished grade.
4.2.2.5
Rooms. Separate rooms shall be provided for the mechanical
systems and electrical switchgear in conformance with NFPA 70.
4.2.2.6
Floor Trenches. Floor trenches with removable steel covers shall
be provided for compressed air piping and electrical conduits. The floor
trenches shall be arranged to accommodate the compressed air and electrical
connections, and to provide underfloor egress for the FPUS underground
mains. The trench floor shall be sloped to drains provided at each end.
4.2.3
Structural Requirements. Structural designs shall be based on
local live-load conditions, wind loading, and seismic conditions as
governed by criteria for the specific site location. Local site frost lines
and soil bearing capability shall be incorporated in the design. Refer to
NAVFAC DM-2 series, Structural Engineering, for criteria and requirements.
4.2.3.1
Foundations. Generally, shallow spread footing foundations shall
be used. The site soil conditions, however, could necessitate investigation
of alternate type foundation systems. The exterior foundation system shall
be a grade beam continuous over spread footings or pile caps, as required,
at the building columns.
4.2.3.2
Building Frame. The building shall be of rigid frame,
construction clear spanning the building width. The roof system shall have
a slope of 2 in. (51 mm) vertical to 12 in. (305 mm) horizontal. Framing
shall include roof purlins and wall girts. The structure shall support a
monorail and traveling hoist with a 2000 lb (906 kg) capacity in the
overhead space without interior columns.
4.2.3.3
Floor Structures. Floor shall be reinforced concrete slab-on-
grade with a design to support the appropriate equipment and forklift wheel
loads.
4.2.3.4
Equipment Pads. Equipment pads shall consist of reinforced
concrete and shall be a minimum of 6 in. (152 mm) thick and designed to
accommodate the particular equipment base. Pads for air compressors shall
be isolated from floor slabs.
4.2.4
Mechanical Requirements. The mechanical systems shall comply
with the standards specified in NAVFAC DM-3 series, Mechanical Engineering,
and as defined in pars. 4.2.4.1 through 4.2.4.3.
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