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ตารางที 3 - 7 Minimum Geometric Requirments for Helipads.

Item Forward area Support area Rear area
No. Description OH - 6A UH - 1D CH - 47 CH - 54 OH - 6A UH - 1D CH - 47 CH - 54 OH - 6A UH - 1D CH - 47 CH - 54 Remarks.
LANDING PAD
1 Length, M. ............. 3.7 6.1 15.3 15.3 3.7 6.1 15.3 15.3 7.7 12.2 30.1 30.1
2 Width, M. .............. 3.7 6.1 7.7 15.3 3.7 6.1 7.7 15.3 7.7 12.2 15.3 30.1
3 Landing pad grade in direction
of approach or departure. 3 3 3 3 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Grade
4 Shoulder width, M. ...................... 3.1 3.1 3.1 3.1 7.7 7.7 7.7 7.7 will be
5 Grade of shoulder in direction all in
of approach or departure. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 one
6 Transverse grade of shoulder, % direction
Maximum.................................... 3 3 3 3 3 3 3 3
Minimum.................................... 2 2 2 2 2 2 2 2
7 Grade of clear area Maximum % 10 10 10 10 5 5 5 5 5 5 5 5
lANDING AREA
8 Length, M. ............. 22.0 30.1 45.8 45.8 32.1 36.6 45.8 45.8 32.1 36.6 45.8 45.8
9 Width, M. .............. 22.0 30.1 38.1 45.8 32.1 36.6 45.8 45.8 32.1 36.6 45.8 45.8

ข -12 APPROACH - DEPARTURE ZONE
10 Approach-departure surface ratio. 10 : 1 10 : 1 10 : 1 10 : 1 10 : 1 10 : 1 10 : 1 10 : 1 10 : 1 10 : 1 10 : 1 10 : 1
11 Length, M. ................ 458 458 458 458 458 458 458 458 458 458 458 458
12 Width at end of landing area M. 22 31 39 46 33 37 46 46 33 37 46 46
At outer end, M. ............... 153 153 153 153 153 153 153 153 153 153 153 153
TAKEOFF SAFETY ZONE
13 Length, M. ............. 153 153 153 153 153 153 153 153 153 153 153 153
14 Width, M. .............. Same as approach departure - zond