J-Hook / Bridle-Ring Count and Bundle Weight
J-hooks / bridle rings for a cable pathway and the bundle weight each carries.
Example
You enter
- Pathway length (ft) 400
- Hook spacing (ft) 4
- Cables in the bundle 50
- Weight per cable (lb/ft) 0.035
You get
- J-hooks / bridle rings 100
- Bundle load per hook 7 lb/hook
Details, formula, and sources
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.
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.
The count and load arithmetic is public first-principles; the support spacing follows TIA-569 and the hook rating comes from the manufacturer.
Estimate. AHJ and licensed professional govern.
Field names used by the API: run_ft, spacing_ft, num_cables, cable_lb_per_ft, hooks, load_per_hook_lb
- Support spacing ~4 to 5 ft on center for TIA-569 non-continuous supportTIA-569
- Cable weight ~0.035 lb/ft per Cat 6 cable (default); the cable datasheet governscable manufacturer