Continuous Footing in expansive soils
Continuous Footing in expansive soils
(OP)
I am designing a residential foundation on potentially expansive soils. The geotech report gives recommendations for conventional continuous and spread footings, and also gives a differential deflection value of 1" in 30 ft. Is the typical method of analysis for this condition to compute the moments for the imposed displacement due to differential deflection and design the reinforcing for that moment. The required amount of reinforcing is getting above what is typical for the area, at least for residential. Makes me think that there might be a better approach.






RE: Continuous Footing in expansive soils
RE: Continuous Footing in expansive soils
We put strip footings on expansive clays all the time here for residential. More and more homes are migrating towards piles but budget sensitive builders still do footings and they generally perform acceptably.