barbed wire is twisted produced mostly in IOWA types and MOTTO type.
IOWA type is traditional twist, picture is as follow:

MOTTO Type is double twist/reverse twist barbed wire , picture is as follow:

IOWA type barbed wire, Materials applies include galvanized steel wire and plastic coated carbon steel wire, has 2 strands and 4 points. Barbs' distance can be 3-6 inches with a tolerance at 1/2" less or more.
Galvanized IOWA Barbed Wire is most popular in export market, because it can offers a great protection against corrosion and oxidation caused by the atmosphere. Its high resistance allows greater spacing between the fencing posts.barbed wire fence is suitable for industry, agriculture, animal husbandry, dwelling house, plantation or fencing.

Wire Materials: electro galvanized steel wire,hot dipped galvanized steel wire. General Use: Barbed wire mainly serves in protecting of grass boundary, railway, highway, etc. |
|
|
Gauge of Strand and Barb in B.W.G. | Approximate Length per Kilo in Meter | Barbs Spacing 3" | Barbs Spacing 4" | Barbs Spacing 5" | Barbs Spacing 6" | 12x12 | 6.0617 | 6.7590 | 7.2700 | 7.6376 | 12x14 | 7.3335 | 7.9051 | 8.3015 | 8.5741 | 12-1/2x12-1/2 | 6.9223 | 7.7190 | 8.3022 | 8.7221 | 12-1/2x14 | 8.1096 | 8.814 | 9.2242 | 9.5620 | 13x13 | 7.9808 | 8.899 | 9.5721 | 10.0553 | 13x14 | 8.8448 | 9.6899 | 10.2923 | 10.7146 | 13-1/2x14 | 9.6079 | 10.6134 | 11.4705 | 11.8553 | 14x14 | 10.4569 | 11.6590 | 12.5423 | 13.1752 | 14-1/2x14-1/2 | 11.9875 | 13.3671 | 14.3781 | 15.1034 | 15x15 | 13.8927 | 15.4942 | 16.6666 | 17.5070 | 15-1/2x15-1/2 | 15.3491 | 17.1144 | 18.4060 | 19.3386 | 16x16 | 16.80 | 18.60 | 20.10 | 21.50 |
|