Two-Leg Bridle Leg Tension
Each leg's tension and angle and the horizontal beam reaction of an asymmetric two-leg bridle from the apex load and the run/rise to each point. The legs never carry half each -- the steeper leg carries more, and a shallow bridle drives both legs above the hung load.
Formula and source
L = sqrt(run^2 + rise^2) per leg; a = run/L, b = rise/L; den = a2 b1 + a1 b2; T1 = W a2/den, T2 = W a1/den; H = T1 a1 = T2 a2.
Entertainment rigging bridle geometry (asymmetric two-leg static resolution), by name.
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