Table 5.4. Towways.
Min of 2.0% prior to
(area between taxiway
channelization Max 10%.
shoulder and taxiway
(See note 2.)
1. NA = Not Applicable
2. Bed of channel may be flat.
3. Metric units apply to new airfield construction and where practical modification to existing airfields and heliports,
as discussed in paragraph 1.4.4.
4. 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.
5. Airfield and heliport imaginary surfaces and safe wingtip clearance dimensions are shown as a direct conversion
from inch-pound to SI units.
Figure 5.6. Towway Criteria.