Labels:crt screen | monitor | reckoner | web site | window OCR: Pier Footings Overview Different types of Footings History of footings Pier Footings Development of ithe Bell Footing Drilled Piers Pre-molded bell drilled pieris below structural member formed by footings drilling hole and then filling the hole with concrete Drilled Review piers have straight sides of constant diameter throughout. Sometimes the bottom of drilled pier is provided with ar References expanded footing called bell. usually under reamed or cut TEST with special bit. in which case the foundation is termed belled pier Drilled piers can be drilled ir almost any diameter the most common being 24" to 36 The bells at the bottom are usually cut at a 3:1 ratio meaning that 24 diameter shaft would have diameter bell. The bell adds significant advantage to the bearing capacity of the pie ...
