Site preparation
3-8
Chapter 3: Installation
98-166784-A
2. Make sure that the recommended flatness on the mast mount plateau is below 3,0 mm.
3. Allow sufficient space so the nut is free of the welded seam and there is room for tools
(min. 50 mm).
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.
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 3-5: ADU mast flange, top and side view (measures in mm)
200
200
200
200
min. 5
min. 5
min. 80
350
20 2
(As close as possible)
min. 5
SCALE 3:10
DETAIL A
Min. four gussets
Figure 3-6: ADU mast flange, recommended flatness on the mast mount
plateau
CAUTION!
Avoid sharp edges where the flange is in direct contact with
the radome. Round all edges as much as possible to avoid damaging the
surface of the radome.
