Wire Ropes, Elements and Definitions - Wire Ropes: Tension, Endurance, Reliability - page 39

Table 1.7 Designation of round wire ropes, ISO 17893
Designation Symbol

(a) Nominal diameter (mm) d

(b) Rope construction (number of strands t 9 number
of strand wires z), strand constr.
Spiral rope with round wires

1 9 z

Spiral rope with round/Z-wires 1 9 (1 - z 1 - z 2 … z n Z)

Single lay rope t 9 z

Seale t 9 zS

Warrington t 9 zW

Filler t 9 zF

Warrington-Seale t 9 z WS

Cross lay t 9 zM

Compound lay t 9 zN

Compound lay, Warrington t 9 z WN

Triangular strand rope t 9 z V

Multi-strand rope, rotation resistant rope t 9 z

Multi oval strand rope t 9 zQ

(c) Core construction from Table 1.5
(d) Nominal wire strength, grade in N/mm 2 R 0

(e) Wire finish
Bright B

Coated U

Zinc coated zn

(f) Lay type and direction (Fig. 1.32 )
Ordinary lay right

sZ

Ordinary lay left zS

Lang lay right zZ

Lang lay left sS

The symbol sequence

22 6 36WS-IWRC-1770-B-sZ

describes a 6-strand Warrington-Seale rope with 22 mm nominal diameter, inde-
pendent wire rope core, nominal strength 1,770 N/mm 2 , bright, ordinary lay.
A Filler rope may be described by the symbol sequence

16 8 25F-NFC-1770-B-zZ
or 16 8 19 þ 6F ð Þ -NFC-1770-B-zZ

to make it quite clear that six of the 25 wires are very small Filler wires.