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<br /> <br /> <br /> <br /> <br /> <br />3rd & Broadway, Santa Ana, CA <br />Volume 2 - Structural Calculations June 17, 2024 | Project # S21043.00 <br /> pg. 83 <br />5.1 INTRODUCTION <br />In the following section, the mat foundation, and perimeter basement wall de sign will be presented. The <br />superstructure of the proposed hotel was modeled using ETABS, as described previously in this report. <br />Gravity loads from this model were imported into a SAFE model via an “.f2K” file as point loads distributed <br />along walls and at column locations. Foundation overturning moments at lateral force resisting elements <br />were implemented into the SAFE model manually to properly assign sign conventions to the sta tic and <br />spectral forces. In addition to the superstructure loads, area loads are implemented in the SAFE model to <br />account for the superimposed dead load and live load at the foundation level. The mat foundation is <br />supported by a vertical soil subgrade modulus provided by the geotechnical engineer. <br />The SAFE model is used to perform checks for 1-way and 2-way shear at the shear walls, core walls, and <br />gravity column locations. Additionally, SAFE is used to perform flexural design of the mat foundations. <br />The perimeter basement walls are designed using the concrete design program S -Concrete. Lateral loads <br />imposed on the perimeter basement walls are from hydrostatic fluid pressure as well as lateral earth <br />pressures provided by the geotechnical engineer. Th e maximum height of the water table is assumed to <br />be located 40’-0” below the ground surface, as recommended by the geotechnical engineer. <br /> <br /> <br />