Laserfiche WebLink
KLE/NFELOER <br /> �Bright People.Right Solutions. <br /> disturbance by concrete or pavement. The allowable friction coefficient and passive resistance <br /> may be used concurrently. <br /> 5.5.3 Settlement <br /> Total settlement of an individual foundation will vary depending on the plan dimensions of the <br /> foundation and the actual load supported as well as the ground conditions. Based on anticipated <br /> foundation dimensions and loads, we estimate maximum total settlement of foundations designed <br /> and constructed in accordance with the preceding recommendations to be on the order of 1/2-inch <br /> or less. Differential settlement between similarly loaded, adjacent footings (assumed to be about <br /> 50 feet) is estimated to be about half the total settlement. <br /> 5.5.4 Construction Considerations <br /> Prior to placing steel or concrete, foundation excavations should be cleaned of any debris, <br /> disturbed soil or water. All foundation excavations should be observed by a representative of <br /> Kleinfelder just prior to placing steel and concrete. The purpose of these observations is to check <br /> that the bearing soils actually encountered in the foundation excavations are similar to those <br /> assumed in analysis and to verify the recommendations contained herein are implemented during <br /> construction. Should soft/loose soils be observed at the base of foundation excavations, the soils <br /> should be overexcavated to firm materials and the excavations backfilled with engineered fill. <br /> The structural engineer should evaluate footing configurations and reinforcement requirements to <br /> account for loading, shrinkage, and temperature stresses. As a minimum, continuous footings <br /> should be reinforced with at least two No. 4 reinforcement bars, one top and one bottom, to <br /> provide structural continuity and permit spanning of local subgrade irregularities. <br /> 5.6 CONCRETE SLAB-ON-GRADE FLOOR SYSTEMS <br /> 5.6.1 General <br /> The near-surface soil underlying the site consists of moderately-to highly-plastic clay that, based <br /> on our data and experience, can exhibit significant expansion characteristics. This subsurface <br /> condition is common within the project area and poses a risk for post-construction heave and <br /> cracking of concrete slabs. The terms expansion or expansive soil generally apply to any soil that <br /> has a potential for swelling or heaving with seasonal or man-made increases in moisture content. <br /> 20210067.001A/ST020R111447 Page 19 of 37 May 11, 2020 <br /> ©2020 Kleinfelder www.kleinfelder.com <br />