Moment at column face per meter width = 174 × 3.0²/2 = 783 kNm/m
Given q_all = 150 kPa :
This document is for educational and illustrative purposes only. Tower crane foundation design involves life-safety critical structures. All designs must be performed by a qualified Structural Engineer and verified according to local building codes (e.g., Eurocode, ACI, ASCE) and the manufacturer’s specific technical manual. tower crane foundation design calculation example link
When performing these calculations, engineers rely on specific guidelines. In the UK and internationally, (recently updated to align with the Eurocodes) is the primary reference document for tower crane bases and ties.
Tower cranes are the backbone of high-rise construction. However, a tower crane is only as reliable as the ground it stands on. A catastrophic foundation failure can lead to loss of equipment, project delays, injuries, or fatalities. Unlike standard building foundations, tower crane foundations are subjected to extreme overturning moments, torque, and horizontal forces. Moment at column face per meter width = 174 × 3
Foundations must first be stable against tipping and sliding before internal reinforcement is designed. Check Type Formula / Condition Example Result Overturning Soil Pressure Calculated pressure < 180 kPa Frictional resistance >> Horizontal force cap W sub t o t a l end-sub
Now we calculate the maximum pressure the foundation exerts on the soil and compare it to the soil's bearing capacity. However, a tower crane is only as reliable
The factor of safety against overturning is calculated as:
): The combined weight of the crane mast, jib, counter-weights, and the maximum hook load. Overturning Moment (
Overturning moment M = 3,200 kNm Horizontal force H = 180 kN → effective moment at base: M_eff = M + H × h = 3,200 + 180 × 1.2 =
