Site preparation
98-148248-C Chapter 3: Installation 3-9
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4. Use the dimensions in the following figure to prepare the mast flange for mounting of
the ADU.
The following figure shows the bottom view of an antenna.
3.2.6.2 Mast length and diameter
The mast wall thickness is in the following design examples set to 5 mm and the brace wall
thickness to 4 mm. A larger wall thickness yields more stiffness (valid design) whereas a
thinner wall thickness yields a weaker structure (not valid design).
Figure 3-8: ADU mast flange, distance to the welded seam
Figure 3-9: ADU, bottom view
Clearance hole
for M10 bolts
282.8
R221
R238
18
73.5
200
200
220
226.4
THREAD for GROUNDING
M10 (depth: 22mm)