In all cases, infill, curtain or other non-bearing walls should be designed in accordance with the
components and cladding requirements of ASCE 7.
The designer must pay careful attention to detailing the connections between rigid wall elements
and a flexible steel frame. Improper detailing may result in serious damage to the wall elements.
Unreinforced masonry is prohibited by the Minimum Antiterrorism Standards for Buildings
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.
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 untypical 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 facility. The designer may wish to consider careful
detailing between the floor slabs and the surrounding structure or, in the most severe
circumstances, pile supporting the floor slab.
(1) Hangar Floor. Design the primary loading areas of the hangar floors in
accordance with criteria in UFC-3-260-02 AIRFIELD PAVEMENTS. A typical load value of
12 kPa (250 psf) is a useful planning value for hangar bay design loads.
Hangar trench drains should be ductile iron or steel manufactured to withstand a minimum
working load of 100,000 loads(250 psi). AFFF floor nozzles and supporting framework
embedded in trench drain grating should be designed for 36,000 pounds 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 which in turn is below the finished floor elevation of the supporting shops and offices.
(2) Other Ground Floors. Design the slabs on grade in accordance with the
American Concrete Institute (ACI) 360R-2 Design of Slabs on Grade. A floor load value of 6
kPa (125 psf) is typical for the O1 shop areas. Dedicated storage and/or mechanical equipment
rooms may require heavier design loads.