🔩 ASTM F3125 Grade A325/A490 (Pretension Clamp Load Lbs), Turn-of-Nut & DTI

Structural Bolt Tension & DTI Sizing Calculator

Size high-strength structural bolting under RCSC / AISC specifications: calculate minimum required fastener pretension clamping load (lbs: 28,000 lbs for 3/4" A325 to 56,000 lbs for 1" A490), Direct Tension Indicator (DTI) squirt washers, turn-of-the-nut verification, Skidmore-Wilhelm calibration, and steel erection bidding.

1. Project & Operating Inputs

Total Structural Bolts Installed (Fastener Count e.g. 3,500 Bolts)

Bolt Diameter (Inches e.g. 0.875" / 7/8" Grade A325)

Customer Invoiced Bolt Installation Bid ($ / Bolt e.g. $6.85/bolt)

A325 Bolts, Heavy Hex Nuts, DTI Washers, Impact Guns & Labor ($ / Bolt)

2. Financial Breakdown & Yield

RCSC / ASTM F3125 BOLT TENSION

Turnkey Bolting Connection Profit

Steel Erection Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost