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ASME B30.3-2016 pdf download

ASME B30.3-2016 pdf download.Tower Cranes.
(b) Sliding. Cranes shall be evaluated for resistance to sliding along rails by the manufacturer or a qualified person with wind acting in the least favorable direction. Calculations shall demonstrate crane traveling resist- ance sufficient to forestall sliding. Rail clamps or other wind anchorage mechanisms may be provided to fore- stall sliding. 3-1.1.5 Design Wind Velocity (a) TemporaryConstruction TowerCranes (Less Than 5yr) (1) The design out-of-service wind velocity shall be appropriate to the installation site as given in ASCE/ SEI 7. Reductions forthe short-termduration ofa tempo- rary installation can be taken into account per ASCE/ SEI 37. (2) The manufacturer shall furnish recommenda- tions on permitted crane configurations at the various wind velocity levels specified in ASCE/SEI 7 for the geographical region. (3) Out-of-service stability requirements may be satisfied by using stabilizers or ballast when necessary, but rail clamps shall not be used for this purpose on rail traveling cranes. (b) Permanently Mounted Tower Cranes (Longer Than 5 yr) (1) The design out-of-service wind velocity shall be appropriate to the installation site as given in ASCE/ SEI 7. (2) The manufacturer shall furnish recommenda- tions on permitted crane configurations at the various wind velocity levels specified in ASCE/SEI 7 for the geographical region. (3) Out-of-service stability requirements may be satisfied by using stabilizers or ballast when necessary, but rail clamps shall not be used for this purpose on rail traveling cranes. SECTION 3-1.2: SITE PLANNING (a) Prior to erection, a qualified person shall prepare a site plan, including drawings, that defines the follow- ing for each crane: (1) location of the crane base support, indicating the centerline of the tower and elevation of the top of the base support (2) orientation of the base tower, if applicable, for climbing (3) lengths of the jib or luffing boom, counterjib, and tail swing (4) maximum working radius of the jib or luffing boom (5) structures that are inside of or within 6 ft, 6 in. (2 m) of the end of the jib or luffing boom (6) known hazards, including, but not limited to, power lines, train or light rail tracks, occupied structures within the working radius of the crane, restricted air 13 space, areas accessible to pedestrians, public roadways and streets, and subsurface constructions (7) working radii of other tower cranes and mate- rial placement booms, and the location of construction hoists, on the same site or adjacent sites that may inter- fere with the planned operation of the crane (8) the crane’s electrical requirements, indicating the voltage, amperage, phasing, grounding, and any other electrical information specific to the crane (b) Consideration shall be given to the geographic location at which the crane is to be erected with regards to (1) wind in accordance with para. 3-1.1.5. (2) ambient temperatures, both minimum and maximum. (3) salinity, chemical, or other adverse environmen- tal conditions. (4) soil and ground conditions. (5) The location and size of all excavations in the proximity of foundations, supports, and rail supports that could affect the stability of the crane shall be evalu- ated and approved by a qualified person. SECTION 3-1.3: CRANE BASE SUPPORTS (a) Crane base supports shall be designed, con- structed, and installed to support the loads applied by the crane during in-service and out-of-service conditions and be able to transmit these loads to the supporting medium. With the exception of cranes mounted on static or traveling undercarriages, all supports shall be designed to resist the maximum overturning moment createdbythe crane operationsandout-of-servicecondi- tions, when acting at the support. (b) Anchoring blocks for guys, when used, shall be anchored or arranged so that their resistance to lateral movement, pullout, or overturning is a minimum of 150% of the anticipated force applied by the crane operations. (c) Rails shall be attached to their supports in a man- ner that is capable of resisting the horizontal loads as determined by the crane manufacturer or by a qualified person. (d) Splices in rail tracks shall have rail head mating surfaces that are sufficiently smooth so as to not adversely impact the operation of the crane. (e) When required by the site plan, a section of the track shall be designated, arranged, and constructed as an out-of-service parking area. This track section shall have the means needed for supporting the crane against storm wind effects as well as anchoring it against unwanted movement along the track. The out-of-service parking area shall be constructed before erection commences.

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