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. o December 20, 1999 Burgess Res. Page 4 grout backfill. Footings should be continuously reinforced with a minimum of 2 -#4 bars top and bottom(total of 4 bars). Foundations constructed in this manner may be loaded to a bearing capacity of 1500 pounds per square foot total load. Bearing capacity may be increased 1/3 for temporary seismic and wind loads. Lateral loads may be resisted by assuming a passive pressure acting against the side of the footing equal to 250 pounds per cubic foot equivalent fluid pressure or by frictional resistance between the bottom of the footing and the soil with a coefficient of friction of 0.35. It is required that footing excavations be observed by a representative of our office to verify that suitable foundation soil has been encountered The garage slab should be cast independent of the footings with a felt expansion joint separating them. Four inches of gravel should be placed beneath the slab. Prior to slab placement the subgrade should be in a saturated condition for a minimum depth of 24 inches below grade. If construction is occurring in the winter this is generally accomplished by seasonal rains, otherwise, sprinkling or flooding of the subgrade will be required. The subgrade of any exterior flat work should also be in a moist condition prior to concrete placement to minimize the amount of potential movement. It is recommended that our office be retained to perform the recommended foundation observations. Unless we have been retained to provided this service, our office can not be held responsible for problems arising during or after construction that could have been avoided had this service been performed. Costs for this service is in addition to the fee for this report. LIMITATIONS The recommendations of this report are based on the information provided regarding the proposed construction as well as the subsoil conditions encountered at the test hole locations. If it is found during construction that subsurface conditions differ from those described on the boring logs, the conclusions and recommendations of this report should be considered invalid unless the changes are reviewed and the conclusions and recommendations modified or approved in writing. The analysis,conclusions and recommendations contained in this report are based on the site conditions as they existed at the time we excavated our test holes. It was assumed that the test holes are representative of the subsurface conditions throughout the site. If there is a substantial lapse of time between the submission of our report and the start of work at the site, or if conditions have changed due to natural or man made causes,we urge that our report be reviewed to determine the applicability of the conclusions and recommendations considering the changed conditions and time lapse. This report is applicable only for the lots studied. This report should not be used after 3 years or transferred to a third party without the express written consent of our office. r OF Rs 0 s M % • o �Sscc.