Single girder crane – What Is Piping: All about Piping Engineering

EOT (Electric Overhead Traveling) Cranes and Hoist are industrial machines that are mainly used for materials movements in construction sites, production halls, assembly lines, storage areas, power stations, and similar places. Types of Cranes Single girder cranes (Fig. 1A) - The crane consists of a single bridge girder supported on two end trucks. It has a trolley hoist mechanism that runs on the bottom flange of the bridge girder. Double Girder Bridge Cranes (Fig. 1B) - The crane consists of two bridge girders supported on two end trucks. The trolley runs on rails on the top of the bridge girders. Fig. 1: Figure showing single and double girder cranes Selection of Cranes Which Crane should you choose – Single Girder or Double Girder Generally, if the crane is more than 15 tons or the span is more than 30m, a double girder crane is a better solution. Components of Cranes (Fig. 2) Fig. 2: Figure showing Crane Components Essential Parameters for Specifying EOT Cranes (Fig. 3) Fig. 3: Parameters needed for specifying an overhead crane Codes and Standards for EOT Cranes Electric Overhead Traveling cranes shall conform in design, materials, construction, and performance with the current issue of the following specifications, codes, and standards. CMAA 70 Specification for Top Running Bridge & Gantry Type Multiple Girder Electric Overhead Traveling CranesAGMA American Gear Manufacturer’s AssociationASME HST-4 Performance Standard for Overhead Electric Wire Rope HoistsASME Y 14.1 Decimal Inch Drawing Sheet Size and FormatASME B18.2.2 Square and Hex NutsASME B30.2 Overhead and Gantry Cranes (Top Running Bridge, Single or Multiple Girder, Top Running Trolley Hoist)ASME B30.10 HooksAWS D14.1 American Welding Society – Specification for Welding of Industrial and Mill CranesHMI 100-74 Hoist Manufacturer’s Institute - Specification for Electric Wire Rope HoistsNEC 610-14 Determining Amperage Requirements for Cranes and HoistsNEMA ICS 8 Industrial Control and Systems - Crane and Hoist ControllersNFPA70 National Electrical CodeOSHA Occupational Safety & Health AdministrationIBC International Building Code (This will eventually replace UBC)UBC Uniform Building Code Control Equipment (Fig. 4) for EOT Cranes Fig. 4: Typical control equipments for crane HOISTS (Fig. 5) A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. Fig. 5: Figure showing typical Hoists Hoist Selection Factors The weight of the load to be lifted including below-the-hook lifting, load-supporting, and positioning devices.Physical size of the load.Clearance ConsiderationsLifting Speed ConsiderationsHoist duty Hoisting Equipment SheavesHook AssemblyGear AssemblyRope DrumRopes Hoist Standards ASME-HST-1 Performance Standard for Electric Chain HoistsASME-HST-2 Performance Standard for Hand Chain Manually Operated Chain HoistsASME-HST-3 Performance Standard for Manually Lever Operated Chain HoistsASME-HST-4 Performance Standard for Overhead Electric Wire Rope HoistsASME-HST-5 Performance Standard for Air Chain HoistsASME-HST-6 Performance Standard for Air Wire Rope HoistsASME-B30.7 Safety Standard for Base Mounted Drum HoistsASME-B30.16 Safety Standard for Overhead Hoists (Underhung)ASME-B30.21 Safety Standard Manually Lever-Operated HoistsOSHA (Parts 1910 and 1926) adopts or invokes the American Society of Mechanical Engineers Few more resources of your interest.. Piping Design and Layout Piping Interface Piping Stress Analysis Piping Materials