Beam Clamp Reaction and Side-Pull Check
What a bridle leg actually does to the clamp: V = T sin(angle), H = T cos(angle), each checked against the clamp's vertical WLL and the manufacturer's side-pull allowance (zero for most beam clamps). The steep 860 lb leg of the two-leg bridle example loads its clamp to only 38% vertically but 77% of a generous 500 lb side-pull rating - the side pull governs, and on an unrated clamp the verdict is re-rig, not pass. A design aid, not a rigging sign-off.
Formula and source
V = T x sin(angle); H = T x cos(angle); pull_from_vertical = atan2(H, V); vertical_util = V / vertical_WLL x 100; horizontal_util = side_pull_rating > 0 ? H / side_pull_rating x 100 : flagged (no rating).
Static force resolution; ASME B30.20 / beam-clamp manufacturer practice (the WLL is a vertical rating; side pull prohibited unless the manufacturer rates it), by name.
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