1318 W MUKILTEO BLVD 2016-01-01 MF Import

Wrought Corporation JN 06287 August 11, 2Q06 Page 4 concrete curing process. Water vapor also results from occupant uses, such as cooking and bathing. Excessive water vapor trapped within structures can result in a variety of undesirable conditions, inciuding, but not limited to, moisture problems with floaring systems, excessively moist air within occupied areas, and the growth of molds, fungi, and other biological organisms that may be harmful to the health of the occupants. The designer or architect must consider the potential vapor sources and likely occupant uses, and provide sufficient ventilation, either passive or mechanical, to prevent a buiid up of excessive water vapor within the planned structure. Geotech Consultants, Inc. should be allowed to review the final development plans to verify that the recommendations presented ir this report are adequately addressed in the design. Such a plan review would be additional work beyond the current scope of work for this study, and it may include revisions to our recommendations to accommodate site, development, and geotechnical constraints that become more evident during the review process. We recommend including this report, in its entirety, in the project contract documents. This report should also be provided to any future property owners so lhey will be aware of our findings and recommendations. SEISMIC CONSlDERATIONS In accordance with Table 1615.1.1 of the 2003 International Building file within 100 feet of the ground surface is best represented by Soil file). The site soils are not susceptible to seismic liquefaction bec� surface groundwater. CONVENTIONAL FOUNDATIONS Code (IBC), the site soil pro- Profile Type C(Stiff Soil Pro- �use of the absence of near- The proposed structure can be suppoRed on conventional continuous and spread footings bearing on undisturbed, medium-dense or denser, native sand soil. We recommend that continuous and individual spread footings have min�mum widths of 16 and 24 inches, respectively. Exterior footings should also be bottomed at least 18 inches below the lowest adjacent finish ground surface for protection against frost and erosion. The local building codes should be reviewed to determine if different footing widths or embedment depths are required. Footing subgrades must be cleaned of loose or disturbed soil prior to pouring concrete. Depending upon site and equipment constraints, this may require removing the disturbed soil by hand, or the compacting of the sand with vibratory equipment at the subgrade level. An allowabie bearing pressure of 2,000 pounds per square foot (ps� is appropriate for footings supported on competent native soil. A one-third increase in this design bearing pressures may be used when considering short-term wind or seismic loads. For the above design criteria, it is anticipated that the total post-construction settlement of footings founded on competent native soil, �vill be about 3\4 inch, with differential settlements on the order of 1/2 inch in a distance of 50 feet along a continuous footing with a uniform load. Lateral loads due to wind or seismic forces may be resisted by friction between the foundation and the bearing soil, or by passive earth prPssure acting on the vertical, embedded portions of the foundat�on. For the latter condition, the foundation must be either poured directly against relatively Ievei, undisturbed soil or be surrounded by level structural fill. We recommend using the following ultimate values for the foundation's resistance to lateral loading: �.��' GEOTECH CONSULTANTS, INC.