ASME B30.11:2004 pdf free download

ASME B30.11:2004 pdf free download.Monorails and Underhung Cranes.
Within the general scope defined in Section 1 of the introduction. ASMI 133(J.1 1 applies to underhung cranes and monorail systems where load-carrying members, such as end trucks or carriers (trolleys), travel either on the external or internal (see Fig 9) lower flange of a runway track section, %ingle monorail track, crane bridge girder, or jib boom (see Fig. 1), including all curves, switches, transfer devices, lift and drop sections, and associated equipment. This Volume includes provisions of both power-driven and hand-operated equipment on which the carriers are independently controlled. This equipment is grouped together because of the similarity of construction and because of common considerations which are peculiar to this type of equipment. Systems used for transporting personnel require special considerations and are not included in this Volume. Also excluded from this Volume are conveyor systems, including power and free convevors.
SECTION 11-0.2 DEFINITIONS
abnori,J perafin condition,. environmental conditions that are unfavorable, harmful, or detrimental to or for the operation of the crane or carrier, such as excessively high or low ambient temperatures, exposure to weather, corrosive fumes, dust- or moisture-laden atmospheres, and hazardous locations.
administrative or regulatory authority: governmental agency or the employer in the absence of governmental jurisdiction.
appointed: appointed by a duly constituted administrative or regulatory authority
brake: a device, other than a motor, used for retarding or stopping motion by friction or power means.
SECTION 11-1.3 GENERAL CONSTRUCTION
11-1.3.1 Crane Runways and Monorail Tracks
(a) Crane runways, monorails, and supporting structures shall he designed to withstand the loads and forces imposed by the cranes and carriers.
(I’) The structure shall be free from detrimental vibrations under normal operating conditions.
(c) Track sections shall be installed with splices to ensure proper alignment of the surface and sides of the load-carrying flange.
(d) Runway tracks shall be spaced to be compatible with the span and design of the crane.
(e) Where curves are required, special design will be necessary.
(f) Where change in elevation of the track is required, special design will be necessary.
(g) Stops shall be provided at the ends of the carrier or crane travel to prevent the carrier or crane from inadvertently coming off the track or contacting an obstruction. Stops shall be provided at open ends of tracks, such as at interlocking crossovers, track spurs, track openers, and track switches. Stops shall resist impact forces of a fully loaded carrier or crane traveling at 50% of the rated full-load speed.
11-1.3.2 Track Supports
(a) Crane runways or monorail tracks shall be fastened to a supporting structure.
(b) All clamps, hanger rods, bolts, or other suspension fittings and supporting structures shall be designed to withstand the loads and forces imposed by the cranes or carriers. Hanger rods shall be installed plumb within the manufacturer’s tolerances.
(c) Where multiple hanger rods are used at a suspension point, consideration should be given to the unequal load induced in the rods.
(d) Means shall be provided to restrain the track against damaging lateral and longitudinal movement.
(e) Where the track is suspended from hanger rod assemblies, restraining means shall be provided to prevent the hanger rod nuts from backing off the hanger rods.
11-1.3.3 Cranes
All cranes built after the issuance of this Standard should conform to the minimum design parameters as specified in The Manual of Steel Construction, CMAA No. 74, or ANSI MH27.l, as applicable.
11-1.3.4 Welded Construction
All welding procedures and welding operator qualifications to be used on load-sustaining members of cranes shall conform to ANSI/AWS D14.1. Where field welding of track supports is done, welding shall be done in accordance with ANSI/AWS Dl.l.
11-1.3.5 Modifications
The crane and monorail systems may be modified or rerated, provided such modifications and the supporting structure are analyzed by a qualified person or manufacturer of the equipment. A rerated system or one whose load-supporting components have been modified shall be tested in accordance with Section 11-2.2. The new rated load shall be displayed in accordance with Section 11-1.1.