ASME B30.19-2005 pdf download
ASME B30.19-2005 pdf download.Cableways.
SECTION 19-1.3: CONSTRUCTION AND ERECTION 19-1.3.1 Foundations, Anchors, and Guys (a) Bearing foundations shall be constructed to resist 150% of the maximum design loading. (b) Guy anchors shall be constructed to resist 150% of the maximum design loads. These loads shall include any variation of loading due to luffing, or other loads out of the plane of the cableway. Guy ropes shall have a minimum design factor of 3. (c) Anchorages fortrackcable tensionshallbe propor- tioned to resist the nominal breaking strength of the track cable(s). (d) If it is necessary to install rope or track cable in contact with the earth or in water, the design factor should be doubled. 19-1.3.2 Rigging and Reeving (a) Socketing shall be done in a manner specified by the rope or fitting manufacturer or a qualified person. (b) No less than two full wraps of rope shall remain on any drum whenthe lower load blockis inthe extreme low position or luffing falls are at their maximum extended length. (c) The drum end of rope shall be anchored to the drum by an arrangement specified by the cableway or rope manufacturer, the designer, or a qualified person. (d) Eyes shall be made as recommended by the rope, cableway, or fitting manufacturer or a qualified person. Rope thimbles should be used in the eyes. (e) Wire rope clips shall be drop-forged steel of the single saddle (U-bolt) or double saddle type clip. Mallea- ble cast iron clips shall not be used. For spacing, number of clips, and torque values, refer to the clip manufactur- er’s recommendation. Wire rope clips attached with U-bolts shall have the U-bolt over the dead end of the rope and the live rope resting in the clip saddle. Clips shall be tightened evenly to the recommended torque. After the initial load is applied to the rope, the clip nuts shall be retightened to the recommended torque to compensate for any decrease in rope diameter caused bythe load. Rope clip nuts should be retightened period- ically to compensate for any further decrease in rope diameter during usage. (f) Swaged, compressed, wedge-socket, or other type fittings shall be applied as recommended by the rope, cableway, or fitting manufacturer or a qualified person. (g) If a load is supported by more than one part of rope, the tension in the parts shall be equalized. (h) If the track cable(s) is supported by saddles, the saddle radius, rope groove, rope lubrication, and inspec- tion provisions shall conform to the recommendations of the rope, saddle, or cableway manufacturer, the designer, or a qualified person. 11 (i) Any rigging or reeving utilized to attach the track cable(s) to the anchorage shall be proportioned to stati- cally resist the nominal rope break strength of the track cable(s). 19-1.3.3 Ropes (a) All ropes shall be ofa size, grade, and construction to withstand the maximum rated load at the specified design factor. (b) All nonoperating ropes such as guy ropes and messenger and button lines shall have a minimum design factor of 3. (c) The track cable(s) shall have a minimum design factor of 3. (d) All operating ropes such as load ropes, trolley (inhaul-outhaul) ropes, and luffing tackle ropes shall have a minimum design factor of 3.5, except for rotation resistant rope, which shall have a minimum design fac- tor of 5. NOTE: The rope size and construction as defined above shall be determined on the basis of rope loads resulting from the designer/ manufacturer’s ratings, approved reeving, and published nominal breaking strength of new rope under static conditions. Ropes of material other than steel may be used only in accordance with the designer’s recommendations. (e) All operating ropes shall be of sufficient length to permit the entire range of movement specified for the application and leave at least two full wraps of rope on the drum at all times. 19-1.3.4 Sheaves (a) Sheave grooves shall be free from surface defects thatcouldcause rope damage. The cross-sectional radius at the bottom of the groove should be such as to form a close-fitting saddle for the size of rope used. The sides of the groove shall be tapered outward and rounded at the rim to facilitate entrance of the rope into the groove. Flange rims shall run true about the axis of rotation. (b) Sheaves carrying ropes that can be momentarily unloaded shall be provided with close-fitting guards or other devices to guide the rope back into the groove when the load is applied again. (c) The sheaves in the lower load block shall be equipped with close-fitting guards that will minimize ropes from becoming fouled when the block is landed and the ropes are loose. (d) Means shall be provided to minimize chafing of the ropes. (e) All running sheaves shall be equipped with means for lubrication. Permanently lubricated, sealed, and/or shielded bearings are acceptable. (f) Load hoist sheaves shall have pitch diameters no less than 18 times the nominal diameter of the rope. (g) Except for load hoist sheaves, other operating sheaves shall have pitch diameters no less than 16 times the nominal diameter of the rope.
