Carl Stahl Sava Industries





Download the Cable Design Guide

Download the
Cable Design Guide

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Catalog


Design Info
Mechanical Cable Construction (Wire Rope)
Stainless steel or galvanized steel strand, wire rope or cable

wire rope construction

Stainless steel or galvanized steel strand, wire rope or cable, is a uniform helical arrangement of wires concentrically stranded together for a variety of operating conditions. These constructions have different properties which are designed for specific applications.

The STRAND constructions have larger wires, increased abrasion resistance, and less flexibility. In small sizes, they are useful as fishing lines and leaders, light guying and lanyards; in larger sizes, as guy strand, standard rigging on boats and other applications where flexibility of the cable is not essential.

The CABLE constructions have more wires and are consequently more flexible with less abrasion resistance. This type of construction has applications in automotive, appliances, boating, instrumentation, aviation, agriculture, hobbies, medicine, recreation, etc.

Basic Wire Rope Construction

STRAND Two or more wires laid together – the construction is normally referred to as 1 x the number of wires involved; i.e., 1x7, 1x19, etc.

1x7 (7 WIRES) 1x7 (7 WIRES)
This is the basic strand construction which is used in different combinations to construct another strand or other cables. It is somewhat stiff in larger diameters.
1x19 (19 WIRES) 1x19 (19 WIRES)
Stronger than 1x7 and more symmetrical in configuration, affording still better properties than 1x7.

CABLE Three or more strands laid together – the construction is normally referred to as number of strands x number of wires in each strand (for example–7x7–see below).

3x7 (21 WIRES) 3x7 (21 WIRES)
A combination of three 1x7 strands.
Very flexible in small diameters.
7x7 (49 WIRES) 7x7 (49 WIRES)
A combination of seven 1x7 strands, affording abrasion resistance and flexibility through a wide range of diameters.
7x19 (133 WIRES) 7x19 (133 WIRES)
A combination of seven 1x19 strands, producing a fine combination of strength and flexibility in a wide range of sizes.
7x49 (343 WIRES) 7x49 (343 WIRES)
A combination of seven 7x7 strands, making a cable with extraordinary flexibility for use over small pulleys.