Soil report bearing capacity independent of width 1

[ramihabchi]

In some soil reports they give bearing capacity and allowable bearing pressure as a value independent of foundation width.Settlement and shear failure both depend on foundation width.so how do they come with those valurs?does they neglect for example in bearing capacity the term which include width?

 

[oldestguy]

Likely the job for which the report was done has typical footing loads and sizes, such as a 2 story apartment building. The report writer would not have the data to be exact, so it is general catch-all statement. It's very rare that the writer of a typical report has anythi8g more than a general idea of the loads to be carried, so some general statement is about the best and usually all that is needed for that sort of structure. I've found it only rarely necessary to give charts of column loads and bearing capacity footing allowable stresses, to hopefully keep settlements uniform.

 

[GeoEnvGuy]

You are not providing enough detail of the site conditions on your inquiry. If your site is exposed bedrock at surface settlement is not usually considered.

 

[emmgjld]

1) What was the report accomplished for? A small Residence? A large Residence?, Small or Large Commercial? Industrial?
2) Was the report for a specific project/need or was it a 'generic' because the county/city planners required 'an engineer's report?
3) How simple or complex was the soil profile and geology?
4) How much sampling and associated field & laboratory testing was done?
5) What are the requirements of your job?
This is the kind of information needed to really answer your question.

 

[RGKVI]

The Geotech has probably an idea of the ground conditions on the site from local knowledge or boreholes logs. Example if the SPT N value is 10 in a clayey soil he may suggest the safe bearing capacity is 120kPa based on correlations between SPT N values and undrained shear strength.