ASME B30.2:2011 pdf free download

ASME B30.2:2011 pdf free download.Overhead and Gantry Cranes.
boors (ofgantrv cranes): an extension of the trolley runway that may be raised or retracted to obtain clearance for gantry travel.
frvm (of rerhead cranes): a horitontal member mounted on the trolley to permit hoisting and lowering the load at a point other than directly under the hoist drum or trolley.
brake: a device, other than a motor, used for retarding or stopping motion by friction or power means.
brake, holding: a friction brake for a hoist that is automatically applied and prevents motion when power to the brake is off.
brake, mechanical load: an automatic type of friction brake used for controlling loads in a lowering direction. This unidirectional device requires torque from the motor to lower a load but does not impose any additional load on the motor when lifting a load.
braking ni’ans: a method or device used for stopping/ holding motion by friction or power.
braking. control: a method of controlling speed by removing energy from the moving body or by imparting energy in the opposite direction.
braking, countertorque (plugging): a method of controlling speed by reversing the motor line voltage polarity or phase sequence to develop torque in the direction opposite the rotation of the motor.
braking, d namic: a method of controlling speed by using the motor as a generator, with the energy being dissipated in resistors.
braking. eddy current: a method of controlling or reducing speed by means of an electrical induction load brake. braking, emergency: a method of decelerating a drive when power is not available. The braking effort may be established as a result of action by the operator, or automatically when power to the drive is interrupted.
2-1.5.5 Fire Extinguisher
A portable fire extinguisher, with a basic minimum extinguisher rating of 10 flC, shall be installed in the cab.
2-1.5.6 Lighting
Cab lighting, either natural or artificial, shall provide a level of illumination that enables the operator to observe the operating controls.
SECTION 2-1.6: LUBRICATION
If lubrication is required, accessible means for lubrication should be provided.
SECTION 2-1.7: SERVICE PLATFORMS
(FOOTWALKS)
2-1.7.1 Construction of Service Platforms
Service platforms, when provided with or added to the crane, and attached to the crane, shall conform to the following requirements:
(a) The dimension of the working space in the vertical direction from the floor surface of the platform to the nearest overhead obstruction shall be a minimum of 48 in. (1 220 mm) at the location where a person is performing a function while on the platform.
(b) Crane travel shall be prohibited or restricted while a person is on a seiwice platform and the overhead platform clearance is less than 78 in. (1 980 mm) at any location in the path of travel of the crane.
(c) Service platforms shall have a clear passageway at least 18 in. (457 mm) wide, except at the bridge drive mechanism where not less than 15 in. (380 mm) of clear passageway shall be allowed.
(d) The dimension of the working space in the direction of access to live (energized) electrical parts which are likely to require examination, adjustment, servicing, or maintenance while energized shall be a minimum of 30 in. (762 mm).’
(e) The door(s) of electrical control cabinets shall either open at least 90 deg or be removable.’
(f) Service platforms shall be designed to sustain a distributed load of at least 50 lb/ft2 (2 400 Pa).
(g) Service platforms shall have a slip-resistant walking surface.
(h) Service platforms shall be provided with guard railings and toeboards.
(1) Guard railings and toeboards shall be in compliance with ANSI A1264.1.
(2) Guard railings shall be at least 42 in, (1 065 mm) high and shall he provided with an intermediate railing.