6700 HARDESON RD BASE FILE 2018-01-01 MF Import

� Intracorp July 16, 1998 � E-3592-620 Page 6 This estimate of settlement does not include settlement resulting from consolidation of the fill. We estimate consolidatian sertlement may be on the order of 0.25 percent of the fill thickness, or about three-quarters to one inch over a thirty (30) year period. This settlement would be in addition to the estimated ane inch of settlement induced by the building loads. Vu'hile settlement of this magnitudn may not ef�ect the structural intepriry of the building, it may cause soma cosmetic cr3cking of interior finishes and floors. Footing excavations should be observed by a representative of ECI, prior to placing forms or rebar, to verify that conditions are as anticipated in this report. . .� ._._ j.. Siab-on-grade floors may be supported on the structural fill used to achieve construction subgrade elevations. Disturbed subgrade soil must either be re-compacted or be replaced with structural fill. Slab-on-grade floors should be designed by the structural engineer based on the anticipated toading and the subgrade support characteristics. A modulus of verticai subgrade reaction of two hundred fifty (2501 pounds per cubic inch (pcii may be used for design. Concrete slabs resting an soil ultimately cause the moisture content of the underlying soils to rise. •This results from continued capillary rise and the ending of normal evapotranspiration. As concrete is permeable, moisture will eventually penetrate the slab resuliing in a condition commonly known as a"wet slab" and poor adhesian of floor coverings. To minimize these prob�ems, suitable moisture protection measure should be used. A capiliary �reak, if used, should consist of a minimum of four inches af free-draining sand or gravel. If a vapor barrier is used, two inches of damp sand shouid be placed over the barrier fo� protection during canstruction and to aid in curing of the concrete. �g�gmic Desian Conside�allons The Puget Lowland is classified as a Seismic Zone 3 in the 1994 Unifarm Building Code (UBC). Earthquakes occur in the Puget Lowland with regularity, however, the majority of these events are of such low magnitude they are nat feit without instruments. Large earthquakes do occur, as indicated by the 1949, 7.2 magnitude earthquake in the Olympia area and the 1965, 6.5 magnitude earthquake in the Midway area. Earth Con�u:tntt, Me.