J-Hook / Bridle-Ring Count and Bundle Weight
J-hooks / bridle rings for a cable pathway and the bundle weight each carries: hooks = ceil(run / spacing); load per hook = cables x weight per foot x spacing. A 400 ft run at 4 ft spacing is 100 hooks, and a 50-cable bundle at 0.035 lb/ft puts 7 lb on each; a heavy 200-cable bundle puts 28 lb on each hook (0.93 of a 30-lb hook -- split or upsize). TIA-569 non-continuous support runs about 4 to 5 ft on center. Distinct from the NEC power-raceway support-spacing.
Formula and source
hooks = ceil(run_ft / spacing_ft); load_per_hook_lb = num_cables x cable_lb_per_ft x spacing_ft; utilization = hook_wll_lb > 0 ? load_per_hook_lb / hook_wll_lb : null.
J-hook support identity by name (hook count over the run; bundle load over one span; utilization on the hook WLL); first-principles arithmetic.
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