APPROXIMATE SAFE WORKING LOADS OF NEW BRAIDED SYNTHETIC FIBER LINES (LB) SAFETY FACTOR = 5
|Nominal Line Diameter (inches)||Nylon Cover Nylon Core||Nylon Cover Polypropylene Core||Polyester Cover Polypropylene|
Table 1-3. - Safe Working Load of Braided Synthetic Fiber Line
Construction Wiie rope consists of three parts: wires, strands, and core (fig. 1-3). In the manufacture of wire rope, a number of WIRES are laid together to form the STRAND. Then a number of STRANDS are laid together around a CORE to form the wire ROPE.
The basic unit of wire-rope construction is the individual wire, which may be made of steel, iron, or other metal in various sixes. The number of wires to a strand will vary, dependingonthepurpose for which the wire rope is intended. Wiie rope is designated by the number of strands per rope and the number of wires per strand. Thus a 1/2-inch, 6 by 19 wire rope will have six strands with 19 wires per strand; but it will have the same outside diameter as a 1/2-inch, 6 by 37 wire rope, which will have six strands with 37 wires of much smaller size per strand.
Wire rope that is made up of a large number of small wires is flexible. The small wires are, however, easily broken, so the wire rope does not resist external abrasion. Wire rope that is made up of a smaller number
Figure 1-3. - Parts of a wire rope.Continue Reading