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Cable Pulling Tension Calculator

IEEE 1185 tension/capstan equations, sidewall bearing pressure and 3-cable jam ratio.

AAJappsEngineering Calculation Report

Cable Pulling Tension Calculator

IEEE 1185

Generated

For preliminary engineering use only — always verify results against project-specific standards and a qualified engineer's review before use in a real design.

Setup

Units

Friction Coefficient

Total Cable Weight (lb/ft)

Starting Tension (lbf)

Max Allowable Tension (lbf)

Max Sidewall Pressure (lb/ft)

Pull route (in pull order)

Segment 1

Length (ft)

Segment 2

Length (ft)

Segment 3

Angle (deg)

Radius (ft)

Segment 4

Segment 5

Segment 6

Jam ratio (3 cables in conduit)

Conduit ID (in)

Cable OD (in)

Tension result

Final Pulling Tension (lbf)200.1

Tension Check≤ 5000 lbf ✓

Peak Sidewall Pressure (lb/ft)100.1

Sidewall Pressure Check≤ 300 lb/ft ✓

Tension build-up (segment by segment)

Start: T = 0.0 lbf

Seg 1 (straight-H, L=50): +57.7 → T = 57.7

Seg 2 (straight-H, L=50): +57.7 → T = 115.5

Seg 3 (bend, 90°): T ×= e^(f·θ) → T = 200.1, SWBP = 100.1 lb/ft

Jam ratio result (3-cable)

Jam Ratio J = ID/OD2.759

Jamming RiskInside 2.6–3.2 danger zone ✗