MOMENT [KNm] | ||||
Position of boom | Moment(boom side) → + | |||
I | with concrete in pipe-line | → 780 kNm | ||
II | without concrete in pipe-line | → 275 kNm | ||
III | without concrete in pipe-line | → - 3 kNm |
Total wieght [kg] - boom, table, base(with oil), motor, pump, (+concrete) | |
In operation 7,960 kg | Out of operation 7,000 kg |
Wind-exposed areas [m²] | ||||
Position of boom | Wind-exposed area | Center of gravity distance | remark | |
I II | 16.0 m² boom-side 16.0 m² boom-side | Xg1 = 10.0 m Xg2 = 3.9 m | Wind surface perpendicular to frontal wind | |
I / II III | 4.5 m² 15.0 m² | Ys = 0.5 m Ys = 5.0 m | Exposed area in frontal wind |
Comment : lateral thrust due to wind is calculated according to DIN 1055
Absolute altitude [m] | 0~8 | 8~20 | 20~100 | Above 100 |
W [N/m²] | 800 | 1,280 | 1,760 | 2,080 |
F = W x A | ||
F : wind force | W : lateral thrust due to wind | A : wind surface area |