Tower Crane Foundation Design Calculation Example Link -

  • Soil Properties:
  • Concrete:

    • Total Vertical Load ($P_total$): $$P_total = N_crane + W_c$$ $$P_total = 150 + 243 = \mathbf393 \text kips$$

    Assume 4 anchor bolts, each M48 grade 8.8. Tensile force per bolt due to overturning = (M / lever arm) / 2. tower crane foundation design calculation example link

    Lever arm (distance between two bolt rows) = 1 m. Tension force per bolt pair = 4,500 / 1 = 4,500 kN / pair. Per bolt = 2,250 kN. This is too high – thus, increase bolt size or embedment. Soil Properties:

    Adjust: Use 8 bolts at 1.2m lever arm, group them. Per bolt tension = 4,500 / (4 pairs × 1.2m) = 937.5 kN. Still high → Use high-strength Dywidag bars or embed a steel grillage. Concrete:

    Takeaway: Anchor bolt design often governs; many engineers underdesign this critical connection.