Razor Barbed Wire

Original
price: Negotiable
minimum:
Total supply:
Delivery term: The date of payment from buyers deliver within days
seat: Beijing
Validity to: Long-term effective
Last update: 2017-12-22 05:40
Browse the number: 64
inquiry
Company Profile
 
 
Product details

Material applied for razor type barbed wire and barbed tape wire: Galvanized razor wire or stainless steel razor coils.Razor Barbed Wire can be installed in the form of barbed tape wire or concertina coil to walls or fencings.Razor size and coil size are listed as follows.

Barbed wire has a multifaceted historical context that began in the in mid 19th century Europe, but primarily occurred in The United States and can be divided into two time periods. The first being before the concept was even demonstrated or thought of on such a large scale as the second time period from 1873 onward demonstrates. The second historical part also considers how the barbed wire industry grew and later impacted farming and ranching life in the Western United States and later the world.

It is often overlooked, but it was in France that the first person to propose a fencing type consisting of flat and thin wire was Leonce Eugene Grassin-Baledans in 1860 which consisted of bristling points, creating a painful fence to cross. Louis Francois Janin later proposed a double wire that held diamond shaped barbs made out of metal material in April 1865 and received a patent for his proposal. Michael Kelly from New York shared a similar idea to Janin, but proposed that the fencing should be applied for the specific purpose of deterring animals.[8] More patents followed, and in 1867 alone, there were six patents issued for barbed wire, and only two of them addressed livestock deterrence, one of which was from American Lucien B. Smith of Ohio.[9]Before 1873, the U.S. was moving westward because of recently acquired lands from the Louisiana Purchase that later led to the Plains Indians Wars, solidifying America’s territorial dominance over this great Central Expanse.[10] Ranchers moved out on the plains, and a need was created to fence their land in against encroaching farmers, other ranchers, and railroads throughout the growing West, creating a desire for property delimitation. Additionally, farmers needed to keep stray cattle from trampling their crops, so it was also in the best interest of this group to find a sturdy barrier.[11] Traditional fence materials used in the Eastern U.S. like wood, stone, and hedging were not reliable in the rain starved dusty soils, so a more cost effective alternative was needed to make the cattle operations more profitable for both ranchers and their investors back in the Eastern U.S.


The 1873 meeting and Initial Development

The first of the big four in barbed wire was Joseph Glidden, who at that time was a farmer in 1873, and is often credited for refining the successful barbed wire product, but let others popularize it for him. Glidden initially came up with his idea for a sturdier fence, because of a display at the 1873 fair in DeKalb Illinois by a man named Henry B. Rose. Rose had patented “The Wooden Strip with Metallic Points” in May 1873. The invention was simply wooden block with wire protrusions designed to keep cows from breaching the owners’ fence. That day, Glidden was accompanied by two other men, the first of whom was Isaac L. Ellwood, a hardware dealer and the second was Jacob Haish, a lumber merchant, both of whom shared Glidden’s drive to create a more durable wire that would act as a fence because it would contain fixed barbs. Glidden experimented with a grindstone in order to twist two wires together to successfully hold the barbs on the wire in place which were created from experiments with a coffee mill from his home. Later Glidden was joined by Ellwood who knew his design couldn’t compete with Glidden’s which he applied for patent in October 1873.[13] Meanwhile Haish, who had already secured several patents for barb wire design in the interim already applied over a week before Glidden for a patent on his third type of wire, the S barb and charged Glidden for interference, pushing Glidden’s approval for his patented wire nicknamed “The Winner” back until November 24, 1874.[14] Barbed wire production greatly increased with Glidden and Ellwood’s establishment of the Barb Fence Company in DeKalb, Illinois following the success of The Winner. The company’s success attracted the attention of the Vice President Charles Francis Washburn of Washburn & Moen Manufacturing Company, which was a very important producer of plain wire in the Eastern U.S. Washburn visited De Kalb and convinced Glidden to sell his stake in the Barb Wire Fence Company, while Ellwood stayed in DeKalb and renamed the company I.L Ellwood & Company of DeKalb.

Installation of barbed wire

The most important and most time-consuming part of a barbed wire fence is constructing the corner post and the bracing assembly. A barbed wire fence is under tremendous tension, often up to half a ton, and so the corner post's sole function is to resist the tension of the fence spans connected to it. The bracing keeps the corner post vertical and prevents slack from developing in the fence.

Brace posts are placed in-line about 8 feet (2.4 m) from the corner post. A horizontal compression brace connects the top of the two posts, and a diagonal wire connects the top of the brace post to the bottom of the corner post. This diagonal wire prevents the brace post from leaning, which in turn allows the horizontal brace to prevent the corner post from leaning into the brace post. A second set of brace posts (forming a double brace) is used whenever the barbed wire span exceeds 200 feet (61 m). If an 8" post is * feet in length is driven four feet into the ground the brace post assembly can be omitted.

When the barbed wire span exceeds 650 ft (200 m), a braced line assembly is added in-line. This has the function of a corner post and brace assembly but handles tension from opposite sides. It uses diagonal brace wire that connects the tops to the bottoms of all adjacent posts.

Line posts are installed along the span of the fence at intervals of 8 to 50 ft (2.4 to 15 m). An interval of 16 ft (4.9 m) is most common. Heavy livestock and crowded pasture demands the smaller spacing. The sole function of a line post is not to take up slack but to keep the barbed wire strands spaced equally and off the ground.

Once these posts and bracing have been erected, the wire is wrapped around one corner post, held with a hitch (a timber hitch works well for this) often using a staple to hold the height and then reeled out along the span of the fence replacing the role every 400 m. It is then wrapped around the opposite corner post, pulled tightly with wire stretchers, and sometimes nailed with more fence staples, although this may make readjustment of tension or replacement of the wire more difficult. Then it is attached to all of the line posts with fencing staples driven in partially to allow stretching of the wire.

It is installed from the top down!There are several ways to anchor the wire to a corner post:

Hand-knotting. The wire is wrapped around the corner post and knotted by hand. This is the most common method to attaching wire to a corner post. A timber hitch works well as it stays better with wire than with rope.

Crimp sleeves. The wire is wrapped around the corner post and bound to the incoming wire using metal sleeves which are crimped using lock cutters. This method should be avoided because while sleeves can work well on repairs in the middle of the fence where there is not enough wire for hand knotting, they tend to slip when under tension.

Wire vise. The wire is passed through a hole drilled into the corner post and is anchored on the far side. Wire wrap. The wire is wrapped around the corner post and wrapped onto a special, gritted helical wire which also wraps around the incoming wire, with friction holding it in place. Barbed wire for agriculture use is typically double-strand 12½-gauge, zinc-coated (galvanized) steel and comes in rolls of 1,320 ft (400 m) length. Barbed wire is usually placed on the inner (pasture) side of the posts. Where a fence runs between two pastures livestock could be with the wire on the outside or on both sides of the fence.

Galvanized wire is classified into three categories; Classes I, II, and III. Class I has the thinnest coating and the shortest life expectancy. A wire with Class I coating will start showing general rusting in 8 to 10 years, while the same wire with Class III coating will show rust in 15 to 20 years. Aluminum-coated wire is occasionally used, and yields a longer life.

Corner posts are 6 to 8 inches (15 to 20 cm) in diameter or larger, and a minimum 8 feet (2.4 m) in length may consist of treated wood or from durable on-site trees such as osage orange, black locust, red cedar, or red mulberry, also railroad ties, telephone, and power poles are salvaged to be used as corner posts(poles and railroad ties were often treated with chemicals determined to be an environmental hazard and cannot be reused in some jurisdictions). In Canada spruce posts are sold for this purpose. Posts are driven at least 4 feet (1.2 m) and may be anchored in a concrete base 20 inches (51 cm) square and 42 inches (110 cm) deep. Brace posts are a minimum 4 inches (10 cm) in diameter and are anchored in a concrete base 20 inches (51 cm) square and 24 inches (61 cm) deep. Iron posts, if used, are a minimum 2½ inch (64 mm) in diameter. Bracing wire is typically smooth 9-gauge. Line posts are set to a depth of about 30 inches (76 cm). The main advantage of steel posts is that they can be driven with a post moll or a cylindrical tube closed at one end with plate steel for weight, and pulled out by hand as opposed to wooden posts which must be pounded with a hydraulic pounder and often pulled with a front end loader. Conversely steel posts are not as stiff as wood and wires are fastened with slips along fixed teeth which means variations in driving height effect wire spacing.

During the First World War, screw pickets were used for the installation of wire obstacles; these were metal rods with eyelets for holding strands of wire, and a corkscrew-like end that could literally be screwed into the ground rather than hammered, so that wiring parties could work at night near enemy soldiers and not reveal their position by the sound of hammers.

Total0bar [View All]  Related Comments
 
more»Other products

[ Products search ] [ favorites ] [ Tell friends ] [ Print ] [ Close ]