🔩 ICC-ES AC358 Helical Piles (Torque Correlation Factor Kt), Bracket Underpinning

Helical Pier Underpinning Calculator

Size helical steel screw piers and foundation underpinning retrofit brackets under ICC-ES AC358: calculate ultimate axial load capacity using empirical torque correlation (Capacity Lbs = Installation Torque ft-lbs x Kt factor 9 to 10), hydraulic drive head pressure monitoring, heavy-duty foundation lifting brackets, and underpinning profits.

1. Project & Operating Inputs

Helical Underpinning Piers Installed (Pier Count e.g. 28 Helical Piers)

Average Pier Depth (Feet e.g. 22.0 ft Deep to Solid Strata)

Customer Bid Price for Supplied & Torqued Pier ($ / Pier e.g. $2,450)

Round Shaft Steel Pier, Helix Plates, Foundation Bracket, Mini-Ex ($ / Pier)

2. Financial Breakdown & Yield

ICC-ES HELICAL PIER UNDERPINNING

Turnkey Underpinning Project Profit

Foundation Repair Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost