UFC 4-211-01N
25 October 2004
UFC 1-200-01.
4-5.9.2
Interior Partitions. The interior partitions of the O2 areas should
be non-load bearing CMU. The interior partitions of the O2 areas should be
metal studs. As with exterior walls, the designer is cautioned to carefully
consider the connectivity between rigid wall elements and a flexible steel frame.
4-5.10
Floors. Ground floors are typically slabs on grade. In some
circumstances with particularly poor geotechnical properties or schedules which
do not allow for remediation, pile supported slabs may be desirable. Given that
naval shore facilities are often located near the coast on sites with soils
displaying poor load performance, careful consideration of long-term settlement
is warranted. It is not atypical for the main structural frame to be built on deep
foundations while the ground floor slabs are soil supported. In this circumstance,
differential settlement is a potential risk to the serviceability of the facility. The
designer may consider careful detailing between the floor slabs and the
surrounding structure or, in the most severe circumstances, pile supporting the
floor slab.
4-5.10.1
Hangar Floor. Design the primary loading area of the hangar floor
in accordance with American Concrete Institute ACI 360R Design of Slabs on
Grade. For the shop and equipment area, use a typical load value of 12 kPa
(250 psf) as a planning value and verify with detailed customer interviews.
The hangar floor slab can be designed as a lightly reinforced
concrete slab on grade or as a heavy duty, non-reinforced pavement. The
pavements engineer and the structural engineer must agree on the optimum
approach considering site soil conditions, water table locations and local weather.
UFC 3-260-02, Airfield Pavements, also provides guidance, although it is not
necessary to use fatigue design associated with airfield pavements. As a
minimum, use the following design aircraft to promote flexibility:
Type I Hanger
F-14 C/D Model
Type II Hanger
C-130
Hangar trench drains should be ductile iron or steel, manufactured
to withstand a minimum proof-load of 100,000 loads (pounds spread over an
area not to exceed 1720 kPa (250 psi)). AFFF floor nozzles and supporting
framework embedded in trench drain grating should be designed for 16,000 kg
(36,000 lbs) wheel load distributed over area of nozzle surface. Hangar floors
should be sloped towards hangar doors and drains. In all cases, the finished
floor elevation of the hangar should be above the grade elevation surrounding
the facility. The finished floor elevation of the shops and offices should be above
the finished hangar floor elevation.
4-5.10.2
Other. There may be a requirement for catwalks, mezzanines, etc.
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