1810.2.11 Splices.
BC § 1810.2.11
Splices shall be constructed so as to provide and maintain true alignment and position of the component parts of the deep foundation element during installation and thereafter and shall be of adequate strength to transmit the vertical and lateral loads (including tensions) and the moments occurring in the deep foundation section at the location of the splice without exceeding the allowable stresses for such materials as established in Table 1810.8. In all cases, splices shall develop at least 50 percent of the bending capacity of the deep foundation. In all cases, splices situated in the upper 10 feet (3048 mm) of the deep foundation shall be capable of resisting (at allowable working stresses) the applied moments and shears. For individual deep foundation elements or groups comprised of two deep foundation elements, splices in the upper 10 feet (3048 mm) also shall be capable of resisting the moment and shear that would result from an assumed eccentricity of the load on the deep foundation of 3 inches (76.2 mm). For deep foundations located near a lot line, the applied moment and shears of such deep foundations shall be determined on the basis that the adjacent site will be excavated to a depth of 10 feet (3048 mm) below the nearest established curb level as required in Section 1810.2.10. Exception: For caissons core beams, the splice shall develop the lesser of 50 percent of the capacity of the core in bending or twice the design bending moment carried by the core at the location of the splice, provided that the core splice is not within two caisson diameters of any splice in the casing.
