Ultimate Bearing Capacity for Local Shear Failure: Equations for the Lower Bound Values for the Various Types of Footings.
(1943). The lower limiting values of c and Ø are
where Nc , Nq and Nγ are the reduced bearing capacity factors for local shear failure. These factors may be obtained either from Table 12.1 or Fig. 12.7 by making use of the friction angle Ø.