Furuno FELCOM 82A Series Installation Manual page 12

Mast strength
The mast material must be sufficiently strong to meet the demands of the marine
environment. It should satisfy the following requirements.
• It must be able to support radome mass plus at least 2.5 centimeters of ice and snow. Special
consideration should be given if the unit is operated in areas of heavy snow or freezing
temperature.
• Mast bending moment must be able to withstand expected maximum pitching, rolling and wind
pressure.
To prevent resonance at low frequencies (about 5 Hz), four stays can be fixed between the
mast and the mounting base.
Antenna unit mass
Platform, guardrail mass
Expected ice and snow
Maximum wind pressure (at wind speed 75 m/s)
Maximum bending moment (at wind speed 75 m/s)
Maximum bending moment
(at wind speed 75 m/s, muximum rolling angle)
Maximum bending moment
(at wind speed 75 m/s, maximum rolling angle including 0.5 G speed added by rolling.)
Wind
Pressure
Mass
Mast
Fixing radome
Item
4
Bending
Moment
Mass
87 kg ± 10%
2083 N
1354 N•m
1450 N•m
1730 N•m