Practice Question: Find Crane outrigger Base Spreader thickness
NCEES Civil PE Specification Means and Methods: Construction Methods
You are setting up a crane equipped with 2 ft by 2 ft outriggers that can take a maximum force of 20 kips.
You learn that the site has weak soil and you will have to pour a concrete block to act as a spreader for the load.
What is the required thickness of the reinforced concrete spreader based on the soil bearing capacity?
- Consider a soil bearing capacity of 1500 psf.
- Consider a vertical stress distribution of 1:1.
- Ignore Factor of Safety in your calculation.