Main Applications

Main- and auxiliary hoist line on mobile- and truck cranes. Often used as a single point line. Large lifting heights will require a tag line to prevent excessive spinning of the load. Smaller sizes (< 3/8") are sometimes used on overhead cranes. NOT recommended for construction tower cranes.

Rope Characteristics

Using the rope to its maximum fatigue life will cause the rope to deteriorate from the inside out. Sudden rope failures may be the result. For this reason we do not recommend this construction for tower cranes. There have been fatal and catastrophic accidents involving this rope construction because of undetected inner rope fatigue.

However, mobile and truck mounted cranes are operated on a much less severe duty cycle and it is not expected that 19x7 has to be replaced because of inner rope fatigue but because of other mechanical damages. Keep in mind that this statement covers normal mobile crane use. If you use a mobile crane like a production crane you WILL experience the above mentioned danger situations.

PLUS, regular type 19x7 does not spool very good on multiple layer drums; there is too much strand interlocking causing excessive rope abrasion.

Standard

ASTM A1023/A 1023M - 09, Table 21
EN 10264, 12385 where applicable
CSA G4-09
ISO 2408

Class 19x7 ropes are ROTATION RESISTANT
but NOT non-rotating (Class II).

Breaking Strengths

Note: The maximum CAPACITY, WORKING LOAD LIMIT (WLL), or LINE PULL of the rope usually is 1/5 of the below stated values. For specific information consult the standards applicable to your rope application.

19 x 7 (Steel Core)
Rope dia. inch Nominal Strength tons of 2,000 lbs – EIPS Weight per foot lbs
1/4 2.7  
5/16 4.3 0.18
3/8 6.1 0.25
7 /16 8.3 0.35
1/2 10.8 0.45
9/16 13.6 0.58
5/8 16.8 0.71
3/4 24.0 1.02
7/8 32.5 1.39
1 42.2 1.82
1-1/8 53.1 2.30
1-1/4 65.1 2.84
METRIC 17/18/19 x 7
Rope dia. mm Tensile strength N/mm² Minimum breaking strength kN Weight per meter kg
5   1,960 16.0 0.11
5.5   2,160 21.4 0.12
6   2,160 25.6 0.15
6.5   1,960 27.1 0.17
7   2,160 34.7 0.20
7.5   2,160 39.8 0.23
8   1,960 41.1 0.27
8 24x7 Compac® 2,160 56.7 0.27
9 24x7 Compac® 2,160 68.5 0.36
9.5   1,960 58.0 0.38
10   2,160 70.1 0.40
11   1,960 77.8 0.50
13 24x7 2,160 145.0 0.71

Steel Wire Rope,
Rotation Resistant

Construction:
19 x 7 / 18 x 7 IWRC

Traditional style type rotation resistant rope mainly used on older mobile, truck and yard cranes. Not recommended for tower cranes.

 

Metric Class 18 x 7
Rotation Resistant

Metric rotation resistant ropes are mainly used in small sizes for overhead- or shop gantry hoists applications. Use them only if absolutely required (block starts to spin). Most smaller sizes are Made in Germany.