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- Project No. JB-20100 4 December 2000 Page 9 5.2.2 Cast-In Place Pier/Deep Isolated Footing As an alternate, the canopy structure and sign/monuments may be supported on drilled, cast-in place pier foundation or a deep isolated footing system established in the native soil. The foundation should be designed according to the criteria presented in Table 3. Table 3 FOUNDATION DESIGN CRITERIA FOR CANOPY STRUCTURE CAST-IN PLACE PIER/DEEP ISOLATED FOOTING Item Criteria Diameter or Width Minimum 18 in. Depth* Minimum of 8 feet into acceptable soil or as determined by our representative during drilling. Allowable Bearing Capacity" 3,000 psf Lateral Loads See Section 8.3 "Lateral Load Design Criteria. * Depth of foundation embedment is measured from the lowest adjacent soil grade to the bottom of the pier hole. ** The recommendations above may be increased by one-third for wind and seismic loads. To reduce the potential for differential settlement, we recommend that all excavations be cleaned of slough and loose material prior to placing steel ' reinforcement and concrete. As discussed earlier, loose soils were encountered in the borings and, therefore, shoring or casing of the i excavation may be required. Casings for the piers may be left in place. The foundation should contain steel reinforcement over their entire length with reinforcement as directed by the Project Structural Engineer according to applicable Uniform Building Code (UBC) or American Concrete Institute (ACI) standards. Care should be taken to avoid "mushrooming" at the top of the pier when placing concrete. We recommend that concrete be placed 1 in the foundation excavations within 24 to 48 hours after the time of J acceptance by our representative. IsKorbmacher Engineering. Inc.