The reference calculation in this example is
based on the following criteria:
- Gust wind speed of 75 m/s at the top of
the mast
- 10‑meter mast with 2 sets of guy
wires
Figure 1. Example 1: Mast assembly in reference
wind load calculation
Table 1. Example 1: Wind load calculation for
mast concrete foundation
| Parameters |
Description |
Example 1: Maximum vertical load |
Example 2: Maximum overturning moment |
| Nd |
Normal force |
−14.3 kN (down) |
−5.0 kN (down) |
| Qd |
Shear force |
0.9 kN |
3.1 kN |
| Md |
Overturning moment |
0.9 kNm |
3.1 kNm |
Table 2. Example 1: Wind load calculation for guy
wire concrete foundation
| Parameters |
Description |
Example 1: Maximum guy wire tension |
| Nk |
Normal force |
6.4 kN (up) |
| Qk |
Shear force |
4.7 kN |
| Mk |
Moment |
0 kNm |
Table 3. Example 1: Mast calculation
weights
| Part |
Weight |
| Mast |
35 kg (77.2 lb)
|
| Enclosure with weather station electronics |
40 kg (88.2 lb) |
| Support arm |
5 kg (11.0 lb) |
| Solar panel |
3.5 kg (7.7 lb) |
| Antenna |
1 kg (2.2 lb) |
| Obstruction light |
2 kg (4.4 lb) |
| Lightning protection (air terminal) |
2 kg (4.4 lb) |
| Sensor |
2 kg (4.4 lb) |
Table 4. Example 1: Mast calculation concrete
values
| Description |
Value |
| Concrete volume |
0.45 m3 |
| Concrete weight |
11.3 kN |
| Net pressure of soil |
≥ 70 kN/m2 |
| Groundwater |
No |