(1) Where a foundation bears on gravel, sand or silt, and the water table is within a distance below the bearing surface equal to the width of the foundation, the allowable bearing pressure shall be 50% of that determined in Article 9.4.4.1.
(1) Footing sizes for shallow foundations shall be,
(a) determined in accordance with Section 9.15., or
(b) designed in accordance with Section 4.2. using,
(i) the maximum allowable bearing pressures in Table 9.4.4.1., or
(ii) allowable bearing pressures determined from subsurface investigation. (2) The design procedures described in Section 4.2. are permitted to be used in lieu of the design procedures in this Subsection. (3) The design procedures described in Section 4.2. shall be used where,
(a) deep foundations are used,
(b) the footing size falls outside the scope of this Section, or
(c) the foundation is constructed on peat, filled ground or on sensitive clays as described in Article 9.15.1.1.