angle of 35 minutes or greater. Refer to FAA Order 6480.4, Airport Traffic
Control Tower Siting Criteria and par. 2.2.6.
Architectural and Structural Requirements. See Facility Plate
141-70 (Sheets 1 through 6 of 6). The air traffic control tower is
categorized as low or high density based on air traffic volume. Refer to FAA
Order 6480.7, Airport Traffic Control Tower and Terminal Radar Approach
Control Facility Design. Consider the use of prefabricated modular
construction for tower and tower cab. Provide the following:
a) Removable, modular, access flooring in the tower cab with 18
inches of clearance provided between the floor panels and subfloor to
accommodate wiring and insulated piping. Refer to par. 22.214.171.124.
b) Interior and exterior acoustical treatment to attain the room
criteria described in par. 2.3.1.
Clear span roof structure (no interior columns) in tower cab.
Roof hatch to provide access to the roof from the cab floor.
top elevator landing.
f) Walkway around the exterior of the control cab to facilitate
washing cab windows.
g) Traction type elevator. Refer to NAVFAC DM-3.09 Elevators,
Escalators, Dumbwaiters, Access Lifts, and Pneumatic Tube Systems, and par.
h) Pressure relief system to equalize interior and exterior
atmospheric pressures during high wind conditions.
i) Electrically operated, retractable covers for cab windows at
sites prone to hurricane and typhoon conditions.
A 2,000-pound capacity, remote controlled, electric hoist in the
Suspend hoist from tower cab roof framing.
A cable raceway to cab roof through tubular cab roof columns.
Interior Walls. Provide fire-rated walls for stair enclosure,
plumbing and electrical chases.