Chapter 3
Table 3.7. Airspace Imaginary Surfaces.
Class A Runway
Class B
Requirement
Runway
Item
Item
Requirement
No.
Description
Legend
VFR
IFR
VFR & IFR
Remarks
16
Elevation of
D
NA
152.40 m
152.40 m
Above the established airfield
horizontal
[500 ft]
[500 ft]
elevation.
portion of
Approach-
Departure
Surface
17
Radius of
E
NA
2,286.00 m
An imaginary surface
inner
[7,500 ft]
constructed by scribing an arc
horizontal
with a radius of 2,286 m
surface
[7,500 ft] about the centerline
at each end of each runway
and inter-connecting these
arcs with tangents.
E
NA
4,572.00 m
18
Width of inner
[15,000 ft]
horizontal
surface
E
NA
45.72 m
Above the established airfield
19
Elevation of
[150 ft]
elevation.
inner
horizont-al
surface
F
NA
2,133.60 m
Extends horizontally outward
20
Horizontal
[7,000 ft]
from the outer boundary of the
width of
inner horizontal surface.
conical
surface
F
NA
20:1
Slope ratio is
21
Slope of
horizontal:vertical.
conical
surface
Example: 20:1 is 20 meters
[feet] horizontal to 1 meter
[foot] vertical
F
NA
45.72 m
Above the established airfield
22
Elevation of
[150 ft]
elevation.
conical
surface at start
of slope
F
NA
152.40 m
Above the established airfield
23
Elevation of
[500 ft]
elevation.
conical
surface at end
3-39
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