minimum distance between 2 footings = 0 ? 1

[delagina]

if i have 2 equipment and the footings of these two are right next to each other (footing is not monolithic) is there a minimum distance between the 2?

i cannot combine the footings.

but i worry about foundation rotation.

 

[RHTPE]

Over the course of 40+ years of concrete construction, I have seen many instances of spread footing abutting spread footings with only a "paper" joint between them.

From my perspective as an engineer, I would feel comfortable with this as long as their respective soil bearing pressures were similar along the abutting edges. You might consider requiring a 1/2" joint filler or polystyrene between them to permit either to rotate slightly with respect to the other.



Ralph
Structures Consulting
Northeast USA

 

[cap4000]

What is the footing size, load and soil bearing capacity.

 

[BAretired]

I agree with RHTPE. Don't see a problem.

BA

 

[steellion]

They should be the same depth to avoid one foundation loading the other.

 

[cap4000]

Check out this link for settlement and rotation.

http://www.cte.kmutt.ac.th:8080/WebSubject/CTE443/pdf/Chapter_4_50_Stress_prt.pdf