UFC 4-133-01N
24 February 2005
Including changes 1 and 2, 7 March 2007
a. Antennas and other special equipment: The structural designer will
provide for the support of communication, future ceiling track, and
other special equipment per SSCC FRD and FRS.
b. Provide a pad-eye and support structure for attaching a 226 kg
(500 lb) capacity hoist on the underside of the tower cab roof
structure directly over the center of the tower cab floor hatch. See
paragraph 2-5.3.8 for administrative controls to ensure the cab floor
access hatch is not overloaded.
c.
Tower Cab Glass: The catwalk will be designed to support the
weight of glass panels weighing a minimum of 545 kg (1,200 lb.)
each with a minimum area of 21 m2 (70 ft2); and hoisting,
scaffolding, personnel, and other loads associated with the
replacement of tower cab glass.
d. Elevators: Design will be consistent with the load data required for
specific type of elevator as specified by the architect. Use 100
percent impact for support of elevators.
e. Fireproofing: Use actual dead load of materials selected.
2-5.7.4
Seismic Design.
A Structural Basis of Design must be written for each ATCT. The structural
design of the tower cab mullions and the glazing design of the windows should
be a design focus area to ensure an adequate load path for the transfer of
anticipated loads. Design ATCT as essential per UFC 1-200-01 unless the
special requirements listed below are satisfied.
The Navy does not consider ATCT design to be essential per TI-809-04, Seismic
Design for Buildings (i.e. requiring immediate occupancy (IO) design) if:
a. Inbound air traffic could be diverted to surrounding or nearby
airfields.
b. Emergency and alternate communication systems are available at
the facilities to enable the controllers to maintain contact with pilots.
c.
Such systems are designed to remain operational following a major
earthquake, which implies that an alternate power source is
available, special seismic restraints are used to secure the
equipment, and training of changeover to this equipment is
regularly conducted.
d. Temporary ATC capability can be set up following a major
earthquake without the use of the ATCT.
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