Assume cover = 50mm, Bar diameter = 20mm. $d = 1200 \text mm - 50 - 20 - (20/2) = 1120 \text mm = 1.12 \text m$.
If you want to adjust the calculation to your exact project specifications, let me know the , soil capacity , or if you prefer a pile foundation design . Share public link
Platforms like ExcelCalcs , Structural Guide , and CivilDigital offer downloadable Excel calculation sheets configured for Eurocode 2, Eurocode 7, and ACI 318 standards. tower crane foundation design calculation example link
Do you have a specific crane model or soil condition? Bookmark this article and share it with your temporary works coordinator. If you found this example useful, leave a comment below requesting a part 2 covering pile-supported tower crane foundations for weak soils.
Tower cranes are the lifelines of modern high-rise construction sites. However, their immense height and lifting capacities generate colossal forces that must be safely transferred to the ground. A poorly designed foundation can lead to catastrophic structural failure, making precise engineering calculations a non-negotiable safety requirement. Assume cover = 50mm, Bar diameter = 20mm
Now we calculate the maximum pressure the foundation exerts on the soil and compare it to the soil's bearing capacity.
B×L26the fraction with numerator cap B cross cap L squared and denominator 6 end-fraction qmaxq sub m a x end-sub must be less than qallowq sub a l l o w end-sub Step 3: Safety Against Overturning Share public link Platforms like ExcelCalcs , Structural
Look up specific crane manuals (such as "Liebherr Tower Crane Technical Data Foundations" or "Potain Foundation Manual" ). Manufacturers provide the exact dynamic and static corner loads required to input into your calculation models. 5. Crucial Safety Factors to Consider
TCF-2026-001 Date: April 19, 2026 Author: Structural Engineering Team Subject: Worked example of a tower crane foundation design, including calculation methodology and a reference link to supporting standards/data.
$$ F_S,SL = \frac\textFriction Resistance\textHorizontal Force = \fracP_total \times \muH $$
Calculate the required footing size to maintain a factor of safety (FoS) against overturning, typically 1.5. Overturning Moment ( cap M sub cap O cap T end-sub Restoring Moment ( cap M sub r e s end-sub . For a medium crane, a common footprint is approximately 3. Soil Bearing Capacity Check