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Building Design and Construction Handbook - Merritt - Ventech!

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SOIL MECHANICS AND FOUNDATIONS 6.67<br />

FIGURE 6.28 Bearing capacity factors N � <strong>and</strong> N q, which automatically<br />

incorporate allowance for punching <strong>and</strong> local shear failure. (Reproduced<br />

from R. B. Peck, W. E. Hanson, <strong>and</strong> T. H. Thornburn, ‘‘Foundation<br />

Engineering,’’ John Wiley & Sons, Inc., New York, reproduced<br />

with permission of John Wiley & Sons, Inc.)<br />

Q(B � 6e) Q(B � 6e)<br />

q� � q� � (6.25)<br />

2 2<br />

B B<br />

where q� � largest bearing pressure underneath the footing, which is located along<br />

the same side of the footing as the eccentricity<br />

q� � lowest bearing pressure underneath the footing, which is located at the<br />

opposite side of the footing<br />

Q � load applied to the footing (kN per linear m of footing length or lb<br />

per linear ft of footing length)

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