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ASME A17.6-2017 pdf download

ASME A17.6-2017 pdf download.Standard for Elevator Suspension, Compensation, and Governor Systems.
1.3.1 Descriptions of Terms Specific to Rope Elements 1.3.1.1 Stranded Steel Wire Rope. An assembly of strands laid helically in one layer around a core. See Figure 1.3.1.1-1. 1.3.1.2 Wire. A single continuous length ofsteel with a circular uniform cross-section cold drawn from a rod. 1.3.1.2.1 Finish and Quality of Coating. The condi- tion of the surface finish of the wire, e.g., uncoated or metallic coated (zinc or zinc alloy) shall comply with the following: (a) Uncoated Wire. Carbon steel wire that does not have a metallic coating; formerly referred to as bright wire. (b) Metallic Coated Wire. Carbon steel wire that has a metallic coating. (1) Final-Galvanized Wire. Coated carbon steel wire with a zinc coating applied after the final wire drawing operation. (2) Drawn-Galvanized Wire. Coated carbon steel wire with a zinc coating applied prior to the final wire drawing operation. (3) Final-Coated Zn-5Al-MM Wire. Coated carbon steel wire with a zinc-aluminum alloy (mischmetal) coating applied after the final wire drawing operation. (4) Drawn-Zn-5Al-MM Wire. Coated carbon steel wire with a zinc-aluminum alloy (mischmetal) coating applied prior to the final wire drawing operation. 1.3.1.2.2 Function (a) Load-Bearing Wires (Main Wires). Those wires in a rope that are considered as contributing toward the breaking force of the rope. (b) Non-Load-BearingWires. Thosewires inaropethat are considered as not contributing towards the breaking force of the rope. (c) Filler Wires. Comparatively small wires used in certain constructions to create the necessary number of interstices for supporting the next layer of covering wires. (d) Seizing (Serving) Wires or Strands. Those single wires or strands used for making a close-wound helical serving to retain the elements of a rope in their assembled position. 1.3.1.2.3 Position (a) Center Wire. Wire positioned at the center of a strand of a stranded rope. (b) InnerWire. All wires except center, filler, core, and outer wires of a stranded rope. (c) OuterWire. All wires in the outerlayerofthe strand of a stranded rope. (1) Crown Wire. The visible portion of the helically laid outer wire that contacts the wear surfaces. (2) Valley Wire. The visible portion of the helically laid outer wire that does not contact the wear surfaces. (d) Core Wire. All wires comprising the core of a stranded rope, where applicable. 1.3.1.2.4 LayerofWires. Anassemblyofwireshaving one pitch diameter. The exception is a Warrington layer comprisinglarge and small wires where the smallerwires are positioned on a larger pitch circle than the larger wires. The first layer of wires is that which is laid over the strand center wire. Filler wires do not constitute a separate layer. 1.3.1.3 Strands 1.3.1.3.1 Strand. An element of rope normally consisting of an assembly of wires of appropriate shape and dimensions laid helically in one or more layers around a center wire. 1.3.1.3.2 Shape of Cross-Section (a) RoundStrand. Strandhavingaperpendicularcross- section that is approximately the shape of a circle. See Figure 1.3.1.3.2-1. (b) Compacted Round Strand. A round strand that has been subjected to a compacting process such as drawing, rolling, or swaging. See Figure 1.3.1.3.2-2.
1.3.1.3.4 Strand Type and Constructions: Parallel Lay. Strand that contains at least two layers of wires all of which are laid in one operation (in the same direc- tion). The lay length of all wire layers are equal, and the wire ofany two superimposed layers are parallel to each other resulting in linear contact. NOTE: Strandconstructionis designatedbylistingthenumberof wires, beginningwith the outer wires, with each layer separated by a hyphen. There are three types of parallel lay constructions commonly used for elevator rope, which are as follows: (a) Seale (S). Construction having same number of wires in each layer, e.g., 9-9-1. See Figure 1.3.1.3.4-1. (b) Warrington (W). Construction having outer (Warrington) layer containing alternately large and small wires and twice the number of wires as the inner layer. Warrington layers are designated by listing the number of large and small wires with a plus sign (+) in between and parentheses around the layer, e.g., (6 + 6). See Figure 1.3.1.3.4-2. (c) Filler (F). Construction having outer layer containing twice the number of wires than the inner layer, with filler wires laid in the interstices between the layers. Filler wires are designated with the letter “F.” See Figure 1.3.1.3.4-3.

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