Cal. Code Regs. Tit. 8, div. 1, ch. 4, subch. 4, app B, Plate B-6 - Rule of Thumb

(The following are not suggested as a substitute for accurate tables and reference material, but are sometimes useful in making a final safety check.)

Nails

Safe load lateral resistance in pounds equal eight (8) times the pennyweight.

1-6 d nail = 8 x 6, or 48 pound

1-6 d nail = 8 x 8, or 64 pounds

1-10 d nail = 8 x 10, or 80 pounds

Manila Rope

Safe load in tons equals diameter in inches squared. Not accurate in sizes larger than one inch (1").

1" rope = 1 x 1, or 1 ton safe load

1/2" rope = 1/2 x 1/2, or ¹/ Ss 4 ton safe load

For sisal rope, decrease safe loads by one-third

Plow-steel Cable

Safe load in tons is eight (8) times the diameter in inches squared.

1/2" rope = 1/2 x 1/2 = 1/4 x 8 = 2 tons

Open Eye Hook

Safe load in tons is diameter of eye in inches squared.

2" hook, 2 x 2 = 4 tons

Shackle

Safe load in tons is diameter of pin in one-fourth inches (1/4") squared and divided by three (3).

1/2" diameter = 2 quarters

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Chains

Safe load in tons in six (6) times the square of the diameter of chain stock.

1/2" diameter chain stock

1/2 x 1/2 x 6 = 1 1/2 tons or 3,000 pounds

Notes

Cal. Code Regs. Tit. 8, div. 1, ch. 4, subch. 4, app B, Plate B-6

1. Amendment filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.