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19 February 2019

Choice bumpers for tower cranes in operation at maximum load

Value of the maximum reaction F on the two feedback at the limit of stability

Tower crane at maximum load

Cr = total weight force (daN)

P = total weight of the crane strength (daN)

W = wind force (daN)

I = horizontal inertia forces (daN)

F = maximum force applied on the two feedback at the limit of stability (daN)

a = distance from the axis of tipping crane center of gravity (m)

b = distance from the axis of tipping load (m)

c = distance from the axis of tilting force of the wind (m)

d = the center of gravity of the horizontal forces of inertia (m)

= center distance and strength of cranes inertia axis tilt (m)

f = distance from the axis of tipping load mass center of gravity (m)

Ms (bar) = P * a = stabilizing moment cranes

Mr (bar) = W * b * c + Cr = overturning moment cranes

d = (P * and f * + Cr) / (P + Cr)

F (daN) = (Ms - Mr) / d

NB. Each buffer will not have a maximum reaction above F / 2