Operating instructions

4
LOADINGS – WIND SPEEDS – GUY RADII FOR HILOMASTS
Vertical
headload
Maximum
wind speed
unguyed
Maximum
wind speed
with top guys
Antenna
side
surface
area
R1 R2 Mast
kgs Kph Kph
Top guy
reference
number
Sq. cms metres metres
NH5
NH7
NH9
18
15
180
135
180
160
NUG/1
NUG/1
1000 1.2
1.5
2.4
3.4
NK6
NK9
NK11
NK16
27
22
18
20
164
114
96
65
164
137
125
112
NUG/2
NUG/2
NUG/3
NUG/4
1400 1.5
2.0
2.0
4.0
2.8
4.3
5.3
7.6
NL8
NL9
NL10
NL12
NL16
NL22
32
35
27
25
23
14
140
130
110
95
78
56
140
130
120
110
102
92
NUG/2
NUG/6
NUG/5
NUG/4
NUG/6
NUG/8
2000 1.5
2.0
2.0
2.0
4.0
4.0
3.8
4.1
5.0
6.0
7.3
10.5
NX8
NX10
NX14
NX18
NX25
NX30
50
50
35
30
20
14
155
120
92
70
52
44
155
120
95
83
80
75
NUG/6
NUG/7
NUG/5
NUG/10
NUG/9
NUG/8
3000 1.5
2.0
2.0
4.0
4.0
4.0
3.5
4.8
6.6
8.8
12.0
14.5
NY7
NY10
NY12
NY14
NY18
NY21
120
100
90
70
50
40
150
126
90
80
83
67
*
*
*
*
*
*
-
-
-
-
-
-
11000 -
-
-
-
-
-
-
-
-
-
-
-
The above table shows the vertical headload each mast will support and the
maximum operational wind speed. The weight of the antenna, however, is not usually
the main criterion when selecting a mast. The limiting factor is usually the ‘side
surface area’ of the antenna.
For areas in excess of those shown in the table, the maximum wind speed will be
reduced.