{"id":314,"date":"2011-10-11T03:18:54","date_gmt":"2011-10-11T03:18:54","guid":{"rendered":"http:\/\/wirerope.net\/2015\/2011\/10\/11\/wirebreaks\/"},"modified":"2019-08-09T22:22:19","modified_gmt":"2019-08-09T22:22:19","slug":"wirebreaks","status":"publish","type":"post","link":"https:\/\/wirerope.net\/azwr\/wirebreaks\/","title":{"rendered":"Wire Breaks"},"content":{"rendered":"

Table 14.<\/strong> When to Replace Wire Rope-Based on Number of Broken Wires<\/p>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Standard<\/span><\/th>\nEquipment<\/span>
\n(lbs per ft)<\/span><\/th>\n		Number Broken Wires
\nin Running Ropes<\/span><\/th>\n		Number Broken Wires
\nin Standing Ropes<\/span><\/th>\n<\/tr>\n
In One
\nRope Lay<\/span><\/th>\n		In One
\nStrand<\/span><\/th>\n		In One
\nRope Lay<\/span><\/th>\n		At End
\nConnection<\/span><\/th>\n<\/tr>\n<\/thead>\n
ASME\/B30.2<\/th>\nOverhead & Gantry Cranes<\/th>\n12**<\/th>\n4<\/th>\nNot Specified<\/th>\n<\/tr>\n
ASME\/B30.4<\/th>\nPortal, Tower & Pillar Cranes<\/th>\n6**<\/th>\n3<\/th>\n3<\/th>\n2<\/th>\n<\/tr>\n
ASME\/B30.5<\/th>\nCrawler, Locomotive & Truck<\/th>\nRetirement criteria based on number of broken Cranes Rotation Resistant Rope wires found in length of rope equal to 6 times rope diameter – 2 broken wires maximum, and 30 times rope diameter – 4 broken wires maximum.<\/th>\n<\/tr>\n
Running Rope<\/th>\n6**<\/th>\n3<\/th>\n3<\/th>\n2<\/th>\n<\/th>\n<\/tr>\n
ASME\/B30.6<\/th>\nDerricks<\/th>\n6**<\/th>\n3<\/th>\n3<\/th>\n2<\/th>\n<\/tr>\n
ASME\/B30.7<\/th>\nBase Mounted Drum Hoists<\/th>\n6**<\/th>\n3<\/th>\n3<\/th>\n2<\/th>\n<\/tr>\n
ASME\/B30.8<\/th>\nFloating Cranes & Derricks<\/th>\n6**<\/th>\n3<\/th>\n3<\/th>\n2<\/th>\n<\/tr>\n
ASME\/30.16<\/th>\nOverhead Hoists<\/th>\n12**<\/th>\n4<\/th>\nNot Specified<\/th>\n<\/tr>\n
ANSI\/A10.4<\/th>\nPersonnel Hoists<\/th>\n6**<\/th>\n3<\/th>\n2**<\/th>\n2<\/th>\n<\/tr>\n
ANSI\/A10.5<\/th>\nMaterial Hoists<\/th>\n6**<\/th>\n<\/th>\nNot Specified<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
<\/div>
<\/div>
<\/div>

**Also remove for 1 valley break<\/p>\n<\/div>

<\/div><\/div><\/div><\/div><\/div>
<\/span><\/div>
<\/span><\/div>

Figure 43.<\/strong> A wire broken under a tensile load that exceeds its strength is recognized by the \u201ccup and cone\u201d configuration at the fracture point (a). The necking down of the wire at this point shows that failure occurred while the wire retained its ductility. Shear-tensile fracture (b) occurs in wire subjected to a combination of transverse and axial loads. Fatigue breaks are usually characterized by squared-off ends perpendicular to the wire either straight across or Z-shaped (c&d).<\/p>\n<\/div>

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