Table 7.1-1 Geotechnical Parameters Parameter Value Medium dense sand (SPT) = 20 N Basic soil properties = 125 pcf  Angle of internal friction = 33 degrees 3,000B psf for concentrically loaded square footings 4,000B' psf for eccentrically loaded footings Bearing capacity (Nominal foundation where and are in feet, is the footing width and is B B' B B' geotechnical capacity) an average width for the compressed area. Resistance factor, = 0.45 per Table 12.13-1 of the  Standard Earth pressure coefficients: Active, = 0.3 KA At-rest, = 0.46 K0 Lateral properties Passive, = 3.3 KP Sliding friction coefficient at base of footing = 0.65 Resistance factor, = 0.85 per Table 12.13-1 of the  Standard 2,000 psf for 20 feet ≤ B ≤ Allowable soil bearing for sustained 1,000 psf for 40 feet B ≤ ≤ loads to control settlement (serviceability verification) (may interpolate for intermediate dimensions) The structural material properties assumed for this example are as follows: = 4,000 psi f'c = 60,000 psi fy 7.1.1.2 Seismic Parameters. The complete set of parameters used in applying the to design of Provisions the superstructure is described in Section 6.2.2.1 of this volume of design examples. The following parameters, which are used during foundation design, are duplicated here.
Table 7.1-1 Geotechnical Parameters Parameter Value Basic soil properties Medium dense sand (SPT) N = 20  = 125 pcf Angle of internal friction = 33 degrees Bearing capacity (Nominal foundation geotechnical capacity) 3,000B psf for concentrically loaded square footings 4,000B' psf for eccentrically loaded footings where B and B' are in feet, B is the footing width and B' is an average width for the compressed area. Resistance factor,  = 0.45 per Table 12.13-1 of the Standard Lateral properties Earth pressure coefficients: Active, KA = 0.3 At-rest, K0 = 0.46 Passive, KP = 3.3 Sliding friction coefficient at base of footing = 0.65 Resistance factor,  = 0.85 per Table 12.13-1 of the Standard Allowable soil bearing for sustained loads to control settlement (serviceability verification) ≤ 2,000 psf for B ≤ 20 feet ≤ 1,000 psf for B ≤ 40 feet (may interpolate for intermediate dimensions) The structural material properties assumed for this example are as follows: f'c = 4,000 psi fy = 60,000 psi 7.1.1.2 Seismic Parameters. The complete set of parameters used in applying the Provisions to design of the superstructure is described in Section 6.2.2.1 of this volume of design examples. The following parameters, which are used during foundation design, are duplicated here.
121715_DesignExamples1-8.docx