Wire rope structural

K = Parameter, related with wire rope structure and steel wire position in wire rope when bended. 

A) Significant distortion of the wire rope structure such as kinking, crushing, unstranding, birdcaging, signs of core failure or steel core protrusion between the outer strands. 

Galvanized wire guy strand shall conform to ASTM A-475 Zinc-Coated Steel Wire Strand. Aluminized wire guy strand shall conform to ASTM A-474 Aluminum Coated Steel Wire Strand. Galvanized structural strand shall conform to ASTM A-586 Zinc-Coated Steel Structural Strand. Galvanized structural rope shall conform to ASTM A-603 Zinc-Coated Steel Structural Wire Rope. ... 

Martensite is a hard, nonductile microconstituent formed when steel is heated above its critical temperature and cooled rapidly. In the case of steel of the composition conventionally used for rope wire, martensite can be formed if the wire surface is heated to a temperature near or somewhat in excess of 1400°F (760°C), and then cooled at a comparatively rapid rate. The presence of a martensite film at the surface of the outer wires of a rope that has been in service is evidence that sufficient frictional heat has been generated on the crown of the rope wires to momentarily raise the wire surface temperature to a point above the critical temperature range of the steel. The heated surface is then rapidly cooled by the adjacent cold metal within the wire and the rope structure, and an effective quenching results. 

Roofing, culverts, housing, appliances, auto body panels and components, nails, guy wire, rope, utility wire and fencing Auto body panels and structural components Auto body panels and structural components, housing, appliances and fasteners... 

Use of fibers as reinforcements to make composites is, of course, well established. These are structural applications where, because of the characteristically long length of fibers, they are incorporated in a continuous medium, called the matrix. We describe some of these applications in subsequent chapters in more detail. Yet another common use of fibers of various kinds is in making ropes. In prehistoric times, ropes were made of braided leather strips and vines. Later, vegetable fibers such as jute, hemp, etc., were used to make ropes. More recently, ropes have been made of synthetic pol3nmers and metallic fibers. Ropes can be made by a variety of construction methods twisted, braided, plaited, parallel core and fiber, and wire rope. 

A statistical study of mine-hoist wire ropes showed that 66% of the ropes exhibited greatest loss in strength in the portion of the rope in contact with the shaft environment during its service life (26). The Mine Safety and Health Administration (MSHA) of the US Department of Labor requires that wire ropes in service be visually examined for structural damage, corrosion, and improper lubrication or dressing (27). MSHA also requires performance of careful nondestructive testing (NDT) every 6 months and cites one instance where a contractor reported that four ropes were in acceptable condition for use in an elevator shaft. However, less than 6 weeks later, one of the four 12.7 mm (0.5 in.) diameter ropes broke and another was severely corroded with several broken wires (28). 

The structural portion of the fuse link actuator is a braided multistrand aluminum wire rope. Each aluminum wire is surrounded by a thin palladium jacket. Whenever the temperature of the wire is raised above a critical temperature, an exothermic chemical reaction between the palladium and the aluminum takes place, melting the wire and severing the fuse link. This allows the actuation rod to drop and the hopper gate to open, releasing the... 

Repair bracket scaffold means a supported scaffold consisting of a platform supported by brackets which are secured In place around the circumference or perimeter of a chimney, stack, tank or other supporting structure by one or more wire ropes placed around the supporting structure. 

When a wire rope is placed around the structure in order to provide a safe anchorage for personal fall arrest systems used by employees erecting or dismantling scaffolds, the wire rope shall meet the require-... 

Each wire rope used for securing brackets in place or as an anchorage for personal fall arrest systems shall be protected from damage due to contact with edges, corners, protrusions, or other discontinuities of the supporting structure or scaffold components. 

Towers shaii be anchored to the structure at intervals not exceeding 25 feet. In addition to tie-ins, a series of guys shall be installed. Where tie-ins are not practical the tower shall be anchored by means of guys made of wire rope at least one-half inch in diameter, securely fastened to anchorage to ensure stability. 

B) For body belts, the body belt shall be fitted snugly around the test mass and shall be attached to the test-structure anchorage point by means of a wire rope. 

Figure 43.4 So-called patenting of steel wire with high carbon content, 0.5-1% C. This heat treatment gives the steel a proper structure for further drawing and is used for the manufacture of spring wire, rope wire and cord wire for steel radial tires.

Cause Stress corrosion cracking was established to be a major cause. Chlorine-containing compounds were transferred via the pool atmosphere to surface away from the pool itself resulting in the production of a highly corrosive film on the stainless steel rods which supported the roof structure. The failure occurred around 30°C in highly stressed components which were not frequently cleaned. Such components included brackets, rods, bars, wire ropes, fasteners, etc. 

Causing the structure or building to collapse by the use of wire ropes or explosives may reduce the need for working at heights, but suitable access and working platforms may still be needed during the initial stages. 

NOTE Equivalent means of securement (e.g., vehicle structures, dunnage, dunnage bags, shoring bars, etc.) may be used to comply not all cargo must be tied down with chains, webbing, wire rope, cordage, etc. 

Steel in a wire or filamentary form is commonly used for reinforcement of tires and pressure hoses. It is also used for reinforcement of concrete, although more often than not, for this purpose it is in the form of a rod (diameter greater than 1 cm) rather than a wire. Steel wire with 0.8-0.9 wt% carbon (eutectoid steel) is used in pianos and in steel ropes used as cables in su iension bridges and for other structural purposes. We should emphasize the use of fine diameter steel... 

Meticulous search for individual wire breaks and other minor defects of the surface can hardly be fulfilled with ropes in mine shaft transportation systems. Generous lubrication and dust particles sticking therein prevent complete analysis of the wire structure. The accuracy of... 

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