Table 6.2. Rotary-Wing Aprons for Army Airfields.
No. Item Description
For aprons regularly servicing H-53 helicopters.
1. Metric units apply to new airfield construction and where practical modification to existing airfields and heliports,
as discussed in paragraph 1.4.4.
2. The criteria in this manual are based on aircraft specific requirements and are not direct conversions from inch-
pound (English) dimensions. Inch-pound units are included only as a reference to the previous standard.
3. Airfield and heliport imaginary surfaces and safe wingtip clearance dimensions are shown as a direct conversion
from inch-pound to SI units.
6.8. Warm-Up Pads. A warm-up pad, also referred to as a holding apron, is a paved area adjacent to a
taxiway at or near the end of a runway. The intent of a warm-up pad is to provide a parking location, off
the taxiway, for aircraft which must hold due to indeterminate delays. It allows other departing aircraft
unencumbered access to the runway.
6.8.1. Navy and Marine Corps. Warm up pads are not usually required at Navy facilities. Typically
the end cross over taxiway is widened to 46 m [150 ft] which provides room to accommodate
aircraft warming up or waiting for other reasons.
126.96.36.199. At End Turnoff Taxiway. The most advantageous position for a warm-up pad is
adjacent to the end turnoff taxiway, between the runway and parallel taxiway, as shown in
Figure 6.9. However, other design considerations such as navigational aids may make this
188.8.131.52. Along Parallel Taxiway. If airspace and navigational aids prevent locating the warm-up
pad adjacent to the end turnoff taxiway, the warm-up pad should be located at the end of and
adjacent to the parallel taxiway, as shown in Figure 6.10.