📊 Dynamic Piling Formula (Driven Piles) Engineers use the Engineering News-Record (ENR) Formula to determine allowable pile capacity. [2] Ra = 2 x E x W x H / ( S +C) Key Variables 🧪 Bored Piling Formula (Cast-in-Place) [6] For drilled shafts, total capacity combines skin friction and end bearing resistance. Qu = Qs […]