... uplift resistance of a belledshaft, the side resistance above the bell shouldconservatively be neglected if the resistance of thebell is considered, and it can be assumed that the bellbehaves ... thickness of the bottom edge of the enlargedbase shall not be less than 6.0 IN. 1 0- 143 10. 8.4 Extreme Event Limit StateThe provisions of Article 10. 5.5.3 and 10. 7.4 shallapply.C10.8.4See ... uplift resistance of a belleddrilled shaft in a cohesive soil, RR, in KIPS, should be determined as:bellsupnRRRR (10. 8.3.7. 2-1 )in which:ubellsbellsAqR (10. 8.3.7. 2-2 )where:qsbell=...