Laserfiche WebLink
, � <br />� <br />- Page 8 - f�4220 92�026 <br />, <br /> 3 5 Ground Floor Slab Support <br /> The recommendations provide� in the Site Preparation section should be adequate for support of the <br /> proposed floor slab. The floor slab should be designed for a soil having a modulus of subgrade reaction <br /> of 100 pci. The upper 6" of material just below the floor slab should consist of a relatively clean sand <br /> with less than SR6 passing the#200 sieve. In addition, floors which are sensitive to moisture should be <br /> provided with a vapor barrier at least 6 mils thick located between the soil subgrade and the 6" sand <br />. layer. The purpose of the sand cushion and the vapor barrier is to minimize transmission of the moisture <br /> to the slab from the underlying soils. - <br /> a n �nNc�r�rt�TrON CONSIDERATIONS AND OBSERVATIONS <br /> As was previously noted, the soils encountered at each of the boring locations exhibit soft, wet conditions <br /> in the upper soil layers. Construction will be further complicated by a high groundwater condition. As <br /> a result, adequate dewatering or careful excavation and placement of the fill underwater will be required. <br /> Extreme caution will be required during construction not to disturb soils which are not to be removed. <br /> If soils do become disturbed by vehicle traffic, additional excavation depth may be required. <br /> The excavation and filling should be observ� by a qualified geatechnical engineer or his representative <br /> during construction. 1fie purpose of the observation is to document and test that all unsuitable material <br />' has been removed, and that the replacement fill is properly placed and compacted. Compaction tests <br /> should be completed on any fill as it is placed to document that adequate compaction has been <br /> accomplishe�. � � <br /> � tw�n ata+ test�nq <br />