Table B-34. Results of effective area calculations.

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DOE-STD-3014-96
APPENDIX B
The next step in the near-airport frequency calculation is to determine the effective
area of the facility. The example chosen is an L-shaped facility with a height of 20 feet
and other dimensions as shown in Figure B-6.
FIGURE B-6. Dimensions of sample facility
The bounding rectangle for this facility would be 120 ft x 80 ft. Using Equations B-3
through B-5, the effective areas would be those shown in Table B-34:
TABLE B-34. Results of effective area calculations.
General
Commercial Aviation
Military Aviation
Aviation
Helicopters
Air Carrier
Air Taxi
Large T/O
Large Land
Small T/O
Small Land
WS (from
50
50
98
59
223
223
78
78
Table B-16), ft
R, ft
144.2
144.2
144.2
144.2
144.2
144.2
144.2
144.2
H, ft
20
20
20
20
20
20
20
20
8.2
0.58
9.6
9.6
7.4
9.7
8.4
10.4
cot
L, ft
120
120
120
120
120
120
120
120
W, ft
80
80
80
80
80
80
80
80
S, ft
68
0
1570
1570
780
368
246
447
Af , sq. miles
1.73E-3
3.2E-4
2.48E-3
2.03E-3
3.35E-3
3.96E-3
2.05E-3
2.37E-3
As, sq. miles
4.74E-4
0
1.36E-2
1.14E-3
1.03E-2
4.85E-3
1.96E-3
3.56E-3
A, sq. miles
2.2E-3
3.2E-4
1.61E-2
3.17E-3
1.34E-2
8.81E-3
4.01E-3
5.93E-3
WS = wingspan
R  = diagonal of facility
H  = facility height
L  = facility length
W = facility width
S  = aircraft skid distance
B-42

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