1919 Subpart D
No. Bridle chains attached to derricks or masts are excluded from the annealing requirement in 1919.16(a). The rule states that "All chains (other than bridle chains attached to derricks or masts)... shall be annealed" in accordance with 1919.36. See 1919.16(a).
They must be annealed at least once every six months. 1919.16(a)(1) specifies that half-inch and smaller chains, rings, hooks, shackles, and swivels in general use be annealed at least every six months and in accordance with 1919.36.
They must be annealed at least once every twelve months. 1919.16(a)(2) requires that all other (larger than half-inch) such gear in general use be annealed at least annually in accordance with 1919.36.
The annealing intervals are doubled for gear used solely on hand-operated lifting machinery. 1919.16(a)(3) allows twelve months instead of six for half-inch and smaller items, and two years instead of twelve for larger items, with annealing performed per 1919.36.
"In general use" means the item is used on fifty-two or more days in a year. 1919.16(a)(4) defines the term and ties it to the six- or twelve-month schedules; items used fewer than 52 days per year are not "in general use" for that purpose, but the regulation also states that the period between annealings shall not exceed two years regardless of usage. See 1919.16(a)(4).
No. The regulation explicitly caps the maximum time between annealings at two years. 1919.16(a)(4) states that "the period between annealings shall not exceed two years" even if the item is not "in general use."
The employer (or responsible qualified person) determines when heat treatment is necessary, and any required heat treatment must be done in accordance with 1919.36(b). 1919.16(b) directs that chains, rings, hooks, shackles, and swivels made of materials other than wrought iron or steel be heat treated "when necessary" per 1919.36(b).
No. The annealing schedule depends on size and frequency of use: half-inch and smaller items in general use are annealed every six months while larger items in general use are annealed every twelve months, but items used less than 52 days per year are not considered "in general use," and in all cases the interval between annealings may not exceed two years. See 1919.16(a)(1)–(4).
No. "In general use" means used on fifty-two or more days in a year, so the specific six- or twelve-month schedules for "in general use" items do not apply to an item used only 40 days. However, 1919.16(a)(4) still requires that the period between annealings not exceed two years regardless of use frequency.
Yes. 1919.16 requires that annealing be performed "in accordance with 1919.36." The text of 1919.16(a) links the annealing intervals directly to the procedures and requirements in 1919.36.
It must be annealed at least once every six months because it is half-inch and smaller and is used on fifty-two or more days per year ("in general use"). This schedule is set by 1919.16(a)(1) and the annealing must follow 1919.36.
It must be annealed at least once every two years. 1919.16(a)(3) substitutes two years for the twelve-month interval for larger items when the gear is used solely on lifting machinery worked by hand; annealing must follow 1919.36.
They apply to multiple types of lifting components: chains, rings, hooks, shackles, and swivels. 1919.16(a) explicitly lists all these items and sets annealing intervals and heat-treatment guidance (with 1919.36 governing the procedures).
1919.16 specifies when annealing must be done but requires the annealing to be performed in accordance with 1919.36, which contains the procedural details for annealing and heat treatment. See 1919.16(a).
It requires that components made of material other than wrought iron or steel be heat treated when necessary, and that any required heat treatment be performed in accordance with 1919.36(b). 1919.16(b) places the obligation to heat treat such items "when necessary" and ties the method to 1919.36(b).