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� . <br /> IFOUNDATION DESIGN AND CONSTRUCTION <br /> We recommend supporting the building on shallow-depth foundations according to the BUILDING <br /> I SUPPORT section of this report. Foundations should be spread type. The spread type (footings) <br /> requires construction of footing forms in widened trenches. <br /> ( We evaluated the net allowable ground bearing pressure and load-settlement behavior of tfie <br /> foundation's ground bearing material (vibro-compacted natural ground according to the BUILDING <br /> ( SUPPORT section of this report). A safety factor of 3 is used in the evaluation with respect to <br /> bearing failure. The evaluation assumes that maximum total foundation settlement may be on the <br /> ( order of one (1) inch and differential foundation settlement may be on the order of '/ of this total <br /> settlement. <br /> I The maximum net allowable ground bearing pressure is up to 2000 pounds per square foot (psf�, if <br /> ground supporting the foundation meets requirements in the BUILDING SUPPORT section of this <br /> report. This allowable pressure is limited to continuous (strip-shaped) foundations up to 2 feet <br /> � wide and isolated (square-shaped) foundations up to 7 feet wide. The net design load of the <br /> foundation will be transferred to underlying ground (foundation subgrade). !f isolated foundations <br /> are designed greater than 7 feet wide, the Engineer must review this design and modify <br /> recommendations in this report accordingly. <br /> Exposed foundation bearing surtace subgrades that will directly support the foundation must be <br /> observed and tested by our company with engineering supervision. DCP testing must be <br /> performed along and into these subgrade surfaces. Observation and testing detennine the <br /> reliability of the subgrade to support the foundation. If the subgrade is judged unreliable, a soil <br /> correction may be necessary to improve its reliability. The correction should be made according to <br /> the OVER-EXCAVATION AND STRUCTURAL• BACKFILL section of this report. <br /> All foundations must be properiy steel-reinforced to minimize differential foundation settlement in <br /> areas where the foundation subgrade material may have non-uniform character. Exposed <br /> foundation subgrade materials and soils must be protected against adverse disturbances, which <br /> may reduce the subgrade's support capability. Prevent subgrade disturbances that: nat or deform <br /> it; freeze or thaw it; soak it with water or ground water seepage or ;�ainfall runoff; or dry it <br /> excessively. Open foundation excavations must be kept dry continuously. Surface water flowage <br /> must be directed away from open foundation excavations. Prevent water from damping, wetting, <br /> accumulating, or standing in open excavations. If these above requirements, protections, and <br /> prevention are not provided, the exposed foundation subgrade may soften, weaken, and become <br /> unreliable to support foundations. � <br /> Building code requirements may include foundation design for seismic forces associated with <br /> earthquake motions. The p�oject site is classified as Site Class D according to the 2000 <br /> Intemational Building Code. <br /> Allied Projed 05039 11 July 31, 2005 <br />