SBC for Strip Footing 8

[ak.t]

Dear All,

In Soil report, only the recommendation mentioned for isolated and Raft. In case, If I want to go for strip footing , can i use the SBC given for raft in soil report?

Thank you,

 

[KootK]

Probably but there would be some risk in proceeding with that assumption. I'd seek an amendment to the geotechnical report for strip footings instead.

 

[BAretired]

Why is it that everybody is too lazy to write out a few words nowadays? I can guess what SBC stands for, but why the hell should I have to? IOIKWSBCM,IMHAGA.

BA

 

[JoelTXCive]

SBC is Southwestern Bell Companies right?

 

[Guest090822]

Why is it that everybody is too lazy to write out a few words nowadays? I can guess what SBC stands for, but why the hell should I have to?

Just think if they could use emojis instead

I don't know what SBC means either, and I too have had this happen twice today not knowing what something stands for. With this being an international forum, I can only imagine what people mean.

 

[KootK]

Soil Bearing Capacity

OR

Salad Before Caviar

 

[NOLAscience]

Geotechnical engineers have mastered the art and science of writing reports that do not give an actual, usable recommendation.

Why not adapt the isolated footing SBC for a strip foundation? Isn't a strip foundation just a special case of an isolated foundation?

 

[r13]

Where are our geotechnical guys when you need them? Too many structural noises.

 

[BAretired]

Since there is a soil report, why not just pick up the phone and talk to the guy who wrote it.

BA

 

[r13]

I called SBC with the question, the sweat voice on the other end seemed confused, after several transfer, finally a sales manager answered courteously, "I am afraid we can't help with your question, sir, since we are a telephone company. What else can I help you today? How would you rate your conversation with us, and our services....

 

[Guest090822]

You can probably use the same parameters, just need to back out any shape factors that were associated with the isolation or raft type. I don't know what code you are using, but AASHTO defines a "strip" foundation or "continuous" foundation as having the longer leg at least 5 times greater than the shorter width in the old Standard Spec. I don't recall if they changed it in the LRFD specfications. It shouldn't be too hard to figure out if you talk with the geotechnical engineer.

 

[ak.t]

yes JoelTXCive, SBC is Southwestern Bell Companies. They are related to strip footing and SBC. lol :-D

Thank u for all your suggestions.

 

[Lomarandil]

Best answer -- call your geotech and sweet talk them into a revision.

If your soil is granular, I'm with Rick and would feel comfortable adjusting the allowable bearing capacity (downward) by backing out the shape factors. Might be as much as a 30% reduction.

If your soil is cohesive, allowable bearing capacity is potentially controlled by settlement, so the conversion would not be so simple.

----
just call me Lo.

 

[ak.t]

Thank you Lo

 

[GeoEnvGuy]

You can ask the geotechnical engineer but without any information provided I can only speculate that the width of the strip would need be real narrow to limit the settlements. This is possibly why they recommended isolated or raft.