RR-C-271F
3.3.2.4 Class 4, flat-link chain. The flat-link chain shall be similar to figure 7 and shall be in accordance with the requirements as shown in table II.
FIGURE 7. Type II, class 4, weldless flat-link chain. TABLE II. Type II, class 4, weldless flat-link chain.
Nominal metal thickness (inch) |
Number of links per foot (approx) |
Weight per 100 feet (approx) (pounds) |
Breaking load (min) 1 (pounds) |
Trade number |
||
Steel |
Brass |
Steel |
Brass |
|||
0.083 0.065 0.103 0.125 |
8.5 17 9.75 9 |
16 12.5 35 40 |
17 13 37 42 |
1,600 990 2,190 3,240 |
1,120 695 1,535 2,270 |
2-0 113 210 280 |
1 Maximum working load limit is 25 percent of breaking load.
3.3.2.5 Class 5, bead chain. The bead chain shall be similar to figure 8 and shall be in accordance with the requirements as shown in table III.
FIGURE 8. Type II, class 5, weldless bead chain. TABLE III. Type II, class 5, weldless bead chain.
Nominal diameter of beads (approx) (inch) |
Metal thickness (approx) (inch) |
Number of beads per foot (approx) |
Weight per 100 feet (approx) (pounds) |
Breaking loads (min) (pounds) |
Trade number |
3/32 1/8 3/16 1/4 3/8 |
0.010 0.014 0.017 0.020 0.034 |
102 72 50 40 24 |
0.7 1.5 2.6 4.8 10.8 |
15 28 45 90 200 |
3 6 10 13 20 |
3.3.2.6 Class 6, plumber's chain. The plumber's chain shall be similar to figure 9 and shall be in accordance with ASTM A466/A466M, class SF.
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