MOMENT [KNm]

Position of boom

Moment(boom side) → +        

I

with concrete in pipe-line

→ 774 kNm

II

without concrete in pipe-line

→ 235 kNm

III

 without concrete in pipe-line

 → 25.8 kNm

Total wieght [kg] - boom, table, base(with oil), motor, pump, (+concrete)

In operation 7,500 kg

Out of operation 6,700 kg

Wind-exposed areas [m²]

Position

of boom

Center of gravity distance

remark

I

II

12.3 m²  boom-side

12.3 m²  boom-side

Xg1 = 9.0 m

Xg2 = 4.0 m

Wind surface perpendicular to frontal wind

I / II

III

3.6 m²

10.9 m²

Ys = 0.4 m

Ys = 4.8 m

Exposed area in frontal wind

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