ASME B30.17:2003 pdf download OVERHEAD AND GANTRY CRANES (TOP RUNNING BRIDGE, SINGLE GIRDER, UNDERHUNG HOIST)
Section 17-0.1: SCOPE OF B30.17
Volume B30.17 includes provisions that apply to theconstruction, installation, operation, inspection,ancmaintenance of hand-operated and power-driven overhead and gantry cranes that have a top-running singlegirder bridge, with one or more underhung hoists (seeB30.16 Volume) operating on the lower flange of thebridge girder, used for vertical lifting and lowering offreely suspended, unguided loads (see Figs.1 through5) The requirements included in this volume also applyto cranes having the same fundamental characteristicssuch as polar gantry cranes, cantilever gantry cranessemi-gantry cranes, and wall cranes.
Requirements for a crane used for a special purposesuch as but not limited to, non-vertical lifting servicelifting a guided load, or lifting personnel are notincluded in this volume.
Section 17-0.2: DEFINITIONS
abnormal operafing condifions: environmental conditionsthat are unfavorable, harmful, or detrimental to or forthe operation of a crane, such as excessively high otlow ambient temperatures, exposure to adverse weathercorrosive fumes, dust-laden or moisture-laden atmospheres,and hazardous locations.
adminisfrative or regulafory authorify: governmentalagency, or the employer in the absence of governmentaurisdiction.
appointed: assigned specific responsibilities by theemployer or the employer’s representative.
aufhorized: appointed by a duly constituted administra-tive or regulatory authority.
brake: a device, other than a motor, used for retardingor stopping motion by friction or power means.
braking, confrol: a method of controlling speed by remov-ing energy from the moving body or by impartingenergy in the opposite direction.
braking, countertorque (plugging): a method of controllingspeed by reversing the motor line voltage polarity orphase sequence to develop torque in the direction opposite to the rotation of the motor.
braking, dynamic: a method of controlling speed by usingthe motor as a generator, with the energy being dissipated in resistors.
braking,eddy current: a method of controlling or reducingspeed by means of an electrical induction load brake.braking, emergency: a method of decelerating a drivewhen power is not available. The braking effort maybe established as a result of action by the operator, orautomatically when power to the drive is interrupted.braking, hydraulic: a method of controlling or reducingspeed by means of displacement of a liquid
braking means: a method or device used for stopping/holding motion by friction or power.
braking, mechanical: a method of controlling or reducingspeed by friction.
braking, pneumafic: a method of controlling or poweringa drive or brake by means of compressed gas.braking, regenerafive: a method of controlling speed inwhich the electrical energy generated by the motor isfed back into the power system.
braking,service: a method to decelerate crane motionduring normal operation.
bridge: the part of an overhead crane, consisting of onegirder, trucks, and (if applicable) drive mechanism, thatcarries the trolley or trolleys.
bridge girder: a crane member on which carriers or trol.leys travel horizontally, mounted between and supported by the end trucks.
bridge fravel: the crane movement in a direction parallelto the crane runway.
bumper (buffer): a device for reducing impact when amoving crane or trolley reaches the end of its permittedtravel, or when two moving cranes or trolleys come