3214 BROADWAY BROADWAY KINECT APARTMENTS 2021-08-11

• •• American Property Development ES-0599.06 January 22, 2015 Page 11 • Updated June 9, 2016 • Foundations • Based on the results of our study, the proposed apartment complex can be supported on • conventional spread and continuous footings bearing on competent, undisturbed native soil. • Based on the planned excavations, we anticipate competent native soils suitable for support of foundations will be exposed at the foundation subgrade elevation. Where loose or unsuitable • soils are exposed at the subgrade elevation, the soil should be overexcavated and replaced • with a suitable crushed rock material. Crushed rock placed below foundations should consist of • one and one half inch to two inch clean crushed rock. • Assuming the foundations are supported on competent, undisturbed native soils or suitable • crushed rock material, the following parameters should be used for foundation design: • • • Allowable Soil Bearing Capacity 10,000 psf • • Friction 0.40 • • • Passive Resistance 350 pcf(equivalent fluid)* • "Assumes foundations backfilied with structural fill • For short term wind and seismic loading, a one-third increase in the allowable soil bearing • capacity can be assumed. A factor-of-safety of 1.5 has been applied to the friction and passive resistance values. • With structural loading as expected, total settlement in the range of one inch is anticipated, with • differential settlement of about one-half inch or less over the span of a typical column spacing. • The majority of the settlements should occur during construction, as dead loads are applied. • Slab-On-Grade Floors • Slab-on-grade floors for the proposed building structure should be supported on competent • native soil or a compacted structural fill subgrade, as appropriate. Unstable or yielding areas of • the subgrade should be recompacted or overexcavated and replaced with suitable structural fill • prior to construction of the slab. A capillary break consisting of a minimum of four inches of free • draining crushed rock or gravel should be placed below the slab. The free draining material should have a fines content of five percent or less (percent passing the #200 sieve, based on • the minus three-quarter inch fraction). In areas where slab moisture is undesirable, installation • of a vapor barrier below the slab should be considered. • • • • • • Earth Solutions NW,LLC • •