scaffolding wire rope made in china

Wire rope is made of plaiting strands of wire – normally medium carbon steel –into a thick cable. The strands are formed around a core. The strands in wire ropes are made of wore twisted together. Strands with smaller diameter wires are less abrasion resistant and more fatigue resistant. Strands made with thicker length of wore are more abrasion resistant and less fatigue resistant.

Left-hand ordinary lay (LHOL) wire rope (close-up). Right-hand lay strands are laid into a left-hand lay rope. Right-hand Lang"s lay (RHLL) wire rope (close-up). Right-hand lay strands are laid into a right-hand lay rope.

Left hand lay or right hand lay describe the manner in which the strands are laid to form the rope. To determine the lay of strands in the rope, a viewer looks at the rope as it points away from them. If the strands appear to turn in a clockwise direction, or like a right-hand thread, as the strands progress away from the viewer, the rope has a right hand lay. The picture of steel wire rope on this page shows a rope with right hand lay. If the strands appear to turn in an anti-clockwise direction, or like a left-hand thread, as the strands progress away from the viewer, the rope has a left hand lay.

Ordinary and Lang"s lay describe the manner in which the wires are laid to form a strand of the wire rope. To determine which has been used first identify if left or right hand lay has been used to make the rope. Then identify if a right or left hand lay has been used to twist the wires in each strand. Ordinary lay The lay of wires in each strand is in the opposite direction to the lay of the strands that form the wire.

Alternate lay The lay of wires in the strands alternate around the rope between being in the opposite and same direction to the lay of the strands that form the wire rope.

The specification of a wire rope type – including the number of wires per strand, the number of strands, and the lay of the rope – is documented using a commonly accepted coding system, consisting of a number of abbreviations.

This is easily demonstrated with a simple example. The rope shown in the figure "Wire rope construction" is designated thus: 6x19 FC RH OL FSWR 6 Number of strands that make up the rope

Each of the sections of the wire rope designation described above is variable. There are therefore a large number of combinations of wire rope that can be specified in this manner. The following abbreviations are commonly used to specify a wire rope. Abbr. Description

The end of a wire rope tends to fray readily, and cannot be easily connected to plant and equipment. A number of different mechanisms exist to secure the ends of wire ropes to make them more useful. The most common and useful type of end fitting for a wire rope is when the end is turned back to form a loop. The loose end is then fixed by any number of methods back to the wire rope.

When the wire rope is terminated with a loop, there is a risk that the wire rope can bend too tightly, especially when the loop is connected to a device that spreads the load over a relatively small area. A thimble can be installed inside the loop to preserve the natural shape of the loop, and protect the cable from pinching and abrasion on the inside of the loop. The use of thimbles in loops is industry best practice. The thimble prevents the load from coming into direct contact with the wires.

A wire rope clamp, also called a clip, is used to fix the loose end of the loop back to the wire rope. It usually consists of a u-shaped bolt, a forged saddle and two nuts. The two layers of wire rope are placed in the u-bolt. The saddle is then fitted over the ropes on to the bolt (the saddle includes two holes to fit to the u-bolt). The nuts secure the arrangement in place. Three or more clamps are usually used to terminate a wire rope.

Swaging is a method of wire rope termination that refers to the installation technique. The purpose of swaging wire rope fittings is to connect two wire rope ends together, or to otherwise terminate one end of wire rope to something else. A mechanical or hydraulic swager is used to compress and deform the fitting, creating a permanent connection. There are many types of swaged fittings. Threaded Studs, Ferrules, Sockets, and Sleeves a few examples.

A socket termination is useful when the fitting needs to be replaced frequently. For example, if the end of a wire rope is in a high-wear region, the rope may be periodically trimmed, requiring the termination hardware to be removed and reapplied. An example of this is on the ends of the drag ropes on a dragline. The end loop of the wire rope enters a tapered opening in the socket, wrapped around a separate component called the wedge. The arrangement is knocked in place, and load gradually eased onto the rope. As the load increases on the wire rope, the wedge become more secure, gripping the rope tighter.

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Wire ropes can be seen everywhere around us, they are made of strands or bundles of individual wires constructed around an independent core, suitable for construction, industrial, fitness, commercial, architectural, agricultural, and marine rigging applications.

Wire rod is made from high carbon steel wires(0.35 to 0.85 percent carbon) in a hot rolling process of a required diameter, usually from 5.5mm to 8 mm.

Wire rod is drawn to the required diameter by the 1st drawing machine after descaling dust and rust, adding mechanical properties suitable for application.

Positioning the wires different or the same size lay in multiple layers and same direction, or cross lay and diameter is maintained by one-third of the rope size.

So in theory, it is very simple to manufacture wire ropes. However there are many more details that must be closely monitored and controlled, and this requires time and experienced personnel since it is a super complicated project you cannot imagine.

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Our factory is established in 2008, main products are including ZLP 250/500/630/800/1000 suspended platform and raleted accessories, such as safety lack, hoist, electric control box, steel wire rope ,etc. And the ZLP630 and ZLP800 suspended platform are the most popular models. The rope suspended platform is made of high quality material with advanced technology and strict testing process.

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Two-point adjustable suspension scaffolds, also known as swing-stage scaffolds, are perhaps the most common type of suspended scaffold. Hung by ropes or cables connected to stirrups at each end of the platform, they are typically used by window washers on skyscrapers, but play a prominent role in high-rise construction as well.

Each suspension rope, including connecting hardware, must be capable of supporting, without failure, at least 6 times the maximum intended load applied to that rope while the scaffold is operating at the greater of either [29 CFR 1926.451(a)(4)]:

Suspension ropes supporting adjustable suspension scaffolds must have a diameter large enough to permit proper functioning of brake and hoist mechanisms. [29 CFR 1926.451(f)(10)]

Wire suspension ropes must not be joined together except through the use of eye splice thimbles connected with shackles or coverplates and bolts. [29 CFR 1926.451(d)(8)]

The load end of wire suspension ropes must be equipped with proper-size thimbles, and secured by eyesplicing or equivalent means (Figure 8). [29 CFR 1926.451(d)(9)]

Ropes must be inspected for defects by a competent person prior to each workshift, and after every occurrence which could affect a rope"s integrity (see Tip). [29 CFR 1926.451(d)(10)]

Six randomly distributed wires are broken in one rope lay, or three broken wires in one strand in one rope lay (Figure 11). [29 CFR 1926.451(d)(10)(iii)]

Loss of more than one-third of the original diameter of the outside wires due to abrasion, corrosion, scrubbing, flattening, or peening. [29 CFR 1926.451(d)(10)(iv)]

Swaged attachments or spliced eyes on wire suspension ropes may not be used unless they are made by the manufacturer or a qualified person. [29 CFR 1926.451(d)(11)]

When U-bolt clips are used, the U-bolt must be placed over the dead end of the rope, and the saddle must be placed over the live end of the rope. [29 CFR 1926.451(d)(12)(vi)]

Suspension ropes are to be shielded from heat-producing processes. When acids or other corrosive substances are used on a scaffold, the ropes shall be shielded, treated to protect against the corrosive substances, or shall be of a material that will not be damaged by the substances. [29 CFR 1926.451(f)(11)]

Tip: Analysis of Bureau of Labor Statistics data for suspended scaffold fatalities from 1992-99 found that over 20 percent of fall deaths were due to suspension ropes breaking. This underlines the importance of inspecting ropes before every workshift.

When winding drum hoists are used and the scaffold is extended to its lowest point of travel, there must be enough rope to still wrap four times around the drum. [29 CFR 1926.451(d)(6)]

When other types of hoists are used, the suspension ropes must be long enough to allow the scaffold to travel to the level below without the rope end passing through the hoist, or else the rope end must be provided with means to prevent the end from passing through the hoist. [29 CFR 1926.451(d)(6)]

Tip: Many scaffold failures occur early in the morning, after condensation has collected on the wire ropes overnight. The preferred industry practice at the beginning of a shift is to raise the scaffold 3 feet, hit the brakes, then lower the scaffold and hit the brakes again. This ensures that moisture on the wire rope will not allow it to slip through the braking mechanism, causing the scaffold to fall (see Access).

Tip: When a suspended scaffold sits overnight, water condensation may form on the wire ropes, making them slip through the braking device and cause the scaffold to fall. Before allowing workers onto the platform, a good safety practice is to raise the scaffold 3 feet, then lower it and hit the brakes to clear the moisture (see Support).

When lanyards are connected to horizontal lifelines or structural members, the scaffold must have additional independent support lines and automatic locking devices capable of stopping the fall of the scaffold in case one or both of the suspension ropes fail. These independent support lines must be equal in number and strength to the suspension ropes. [29 CFR 1926.451(g)(3)(iii)]

Tip: Almost all incidents that involve scaffold failure would not lead to fatality or serious injury if proper personal fall-arrest systems were in use. Hence, such incidents almost always involve two violations: One that causes the scaffold to fall, and the other when workers fail to use (or their employers fail to provide) appropriate safety harnesses, lanyards, lifelines, etc.

Two-point suspension scaffolds shall not be bridged or otherwise connected one to another during raising and lowering operations unless the bridge connections are articulated (attached), and the hoists properly sized. [29 CFR 1926.452(p)(5)]

Suspended scaffolds are often made of metal and sometimes used in close proximity to overhead power lines. These factors introduce the risk of electrocution. However, proper clearance and maintenance reduce this risk.

When welding is being performed from suspended scaffolds, the following precautions must be taken, as they apply, to reduce the possibility of welding current arcing through the suspension wire ropes [29 CFR 1926.451(f)(17)]:

An insulated thimble must be used to attach each suspension wire rope to its hanging support (such as cornice hook or outrigger). Excess suspension wire rope and any additional independent lines from grounding must also be insulated. [29 CFR 1926.451(f)(17)(i)]

Six other boilermakers had just left a suspension scaffold when it fell about 392 feet along with the foreman, who was killed. The superintendent had ordered the scaffold"s main support be disassembled before the scaffold was lowered to ground level. Rigging, welding machines, materials and supplies, etc., were placed on the scaffold, and two 1-inch wire rope hoist lines were cut free. This put the load on a single ¾-inch wire rope hoist line, which was overloaded by 255 percent, and on the diesel hoist located outside the chimney, which was overloaded by 167 percent. The superintendent was in a rush to get the system disassembled because a helicopter had been contracted to remove the structural members of the scaffold support system on Monday.

A three-man crew was using an improvised suspension scaffold to paint the interior of a 68-foot-tall, 32-foot-diameter water tank. The scaffold consisted of an aluminum ladder used as a platform, and secured to steel "stirrups" made of steel bar stock bent into a box shape and attached to each end of the ladder. Wire cables from each stirrup ran to a common tie-off point. A cable from this common tie-off was rigged to a block-and-tackle used from ground level to raise and lower the platform. The block-and-tackle supporting the system was secured to a vertical steel pipe on top of the tank by a cable, which was fashioned into a loop by U-bolting the dead ends of a piece of wire rope.

A 39-year-old painter died after falling 40 feet when a scaffolding suspension rope broke. He was a member of a three-man crew engaged in the abrasive blasting and painting of the interior of a 48-foot-high, 30-foot-diameter steel water tank. At the time of the incident, the victim was standing on an outer end of the scaffold platform and was pulling on the suspension rope to raise that end of the scaffold. He fell when the rope broke and his end of the platform dropped to a vertical position. The victim was not using personal fall protection equipment, although it was available and was being used by a second painter. An investigation revealed that the ⅝-inch hoist rope broke at a point where it had been burned some time before the incident.

Two victims and a co-worker were painting the side of a building in San Francisco. They were on a two-point suspension scaffold that did not have guardrails; the ropes suspending the scaffold were old and had not been inspected; and the employees were not wearing safety belts. When the left scaffold rope broke and the scaffold collapsed, one employee was killed and another fell to a nearby roof and broke both arms. The co-worker was left hanging on to the remaining scaffold rope.

Three workers were on a two-point suspension scaffold rated at 500 lbs. working weight. As the employees went up in the scaffold, the right side fell to the ground from an elevation of 20 feet. One worker managed to hold on, the other two fell with the scaffold, resulting in one worker dying and the other being hospitalized for extensive injuries. Investigation indicated that the scaffold motor assembly was improperly connected to the scaffold platform. The workers were wearing the available safety harnesses and lifelines but had not connected the lifelines.

Two employees, the leadman and a trainee mechanic, were assigned to move a two-point suspended scaffold equipped with two SC40 hoists. They lowered the scaffold from the top roof some 16 feet to a small intermediate roof. The plan was to lower the scaffold an additional 20 feet to the main roof. After approximately two feet, the right-side hoist unit stopped. The employees thought that the overspeed brake had accidentally set. The leadman--the competent person on site--got out of the scaffold onto the roof and worked with the trainee to manually override and release the overspeed brake. This was done without inspecting the hoist for sufficient cable length. The right side hoist had only been set up with enough cable to go from the upper roof to the intermediate roof, a total of 16 feet (the total cable length measured 18 feet 5½ inches). When the brake was released, the three inches of cable left on the drum ran out and the hoist fell, causing the right side of the scaffold to drop. The trainee fell 18 feet, landed on a stored scaffold pick, and was lucky to sustain only a chipped ankle bone and a bruised calf. The company did not conduct a fall protection or competent person inspection, nor was a safety line or any fall protection used. The hoist worked as designed, but the wire rope safety device was manually overridden.

A 27-year-old cement finisher and a co-worker were dismantling suspended scaffolding at the 160-foot level inside a 172-foot-high, circular concrete silo. Both men were wearing safety belts with nylon rope lanyards secured to independent lifelines. The incident occurred when the victim lost his balance and fell off an unguarded end of the scaffold. The co-worker stated that he saw the victim fall and jerk upward as the lanyard caught him. When the victim"s weight dropped back on the lanyard, it snapped, allowing him to fall to his death on a concrete floor. Examination of the lanyard after the event showed burn damage at several places, including the point of failure. The employer did not control inspection or distribution of this fall protection equipment. Instead, the equipment was kept in a common supply bin where the workers could readily obtain it when needed and return it when work was completed. The lanyard had been returned to the storage bin even though it had probably been damaged earlier during cutting and welding operations.

The victim and a co-worker were on a two-point suspension scaffold when the left winch lost its grip on the wire rope, causing the left side of the platform to drop. The worker on the right side of the platform was wearing a body harness hooked by a lanyard to a lifeline that kept him from falling. The victim was on the left side of the platform and was wearing the same equipment, but he apparently did not have the lanyard hooked to his lifeline. He fell eleven floors and was killed.

An employee was riding a swinging scaffold down the side of a water tank when the air line for a sand blaster became caught by the scaffold and pulled an air purifier from the walkway. The purifier struck the employee and knocked him from the scaffolding. He was not wearing his safety belt and was killed.

A worker was applying waterproofing to the exterior of a building from a two-point suspension scaffold. Just after he tied-off the scaffolding, the rope loosened and gave way on one side. According to witnesses, the worker slipped out of his safety belt and fell three floors to a concrete walkway and injured his head. He was pronounced dead on arrival at a hospital at 11:55 a.m.

At approximately 2:00 p.m., a painter and a helper were scraping, glazing, and painting windows from a 32-foot-high two-point suspension scaffold. The employees stopped painting because it started to rain. They pulled ⅞-inch manila hoisting ropes up to the work platform and laid them over the top of the guardrail system at both ends of the 19-foot-long scaffold platform. The painter sent the helper to the sidewalk below to receive the tools and paint buckets. While lowering the materials to his helper, the painter was thrown from the scaffold platform when the platform tipped over. He died. The employees were not using fall protection, and the scaffold was not tied off.

Two laborers were working on a motorized two-point suspension scaffold, 70 feet above ground level, without safety belts, lanyards, or lifelines. An "eye" formed by three wire rope clips, which connected the wire rope to the C-hook, failed to hold, and one end of the scaffold came down. One employee fell to the ground, and the second employee at the other end was catapulted through an open window, where he was pulled to safety by office workers. Two of the rope clips were still attached to the end of the rope after the incident. The third clip fell to the ground, and was found to have stripped threads.

An employee was arc welding from a suspended scaffold. The work lead on the welder had frayed insulation in one place, and the bare conductor was exposed. The frayed section of welding cable was tied around the metal guardrail of the scaffold. Since the scaffold was not grounded, it became energized. This caused arcing between the scaffold and the building. The welding current passed through the wire rope supporting the scaffold, and the wire rope separated. The employee and the scaffold fell 50 feet to the ground. The employee was hospitalized for his injuries.

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Steel wire rope for cradle is a kind of galvanized steel wire rope specially used in high building decoration, cradle lifting and manual hoisting devices. With the characteristics of linear structure, extra high tensile strength, small diameter, flexible.

SampleThe sample for 6X19+IWRC 8.3mm hot dip galvanized steel wire rope for suspended platform is free, the freight should on your account before your first order.

1x19 construction is primarilly used for deck railing. It is very stiff and has a smooth, clean finish outside making it ideal for a great looking deck rail cable. There are 19 wires total making a very stiff wire.

7x7 construction is a medium flexible wire rope is ideal for rigging applications where some flexiblity is needed. It is a strong, medium flexible cable commonly used for lifelines and sailboat rigging applications. There are 7 strands and each strand contains 7 individual wires for medium flexibility.

7x19 construction has excellent flexibility commonly used with winch lines, garage door cable, exercise equipment, and sailboat rigging. The flexible construction includes 7 strands with 19 wires per strand.

China Stainless Steel Wire Rope manufacturer and supplier, we provide high quality Stainless Steel Wire Rope to overseas buyers at most competitive price with on-time delivery.

It is the goal of LKS Wire Rope to provide manufactured rigging products and hardware which are competitively priced and delivered on time with zero defects at quality and service levels that are consistent with the expectations of our customers. We fully understand that to do so is good business. The success of LKS Wire Rope depends on our commitment to associate involvement, continual improvement, and improved business performance goals.

6×19 construction wire rope is available with either FC (fibre core) or WSC (wire strand core). When supplied with a wsc the rope is more commonly referred to as 7×19. The rope is very popular in diameters from 3mm to 16mm and is used on a variety of applications. 6×19 FC and 6×19 WSC (7×19) is very flexible in diameters 3mm to 6mm and is used for many requirements where wire ropes are running over pulleys. 7×19 construction is readily available in both galvanised and marine grade stainless steel.

Our electric wire-rope hoists for suspended scaffolding have no working height limit and ensure complete safety. The tension is applied to the working wire-rope, and safety is ensured by a second wire-rope connected to a safety lock.

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