ASME B30.4-2015 pdf – Portal and Pedestal Cranes
ASME B30.4-2015 pdf – Portal and Pedestal Cranes.
(b) Cranes shall be erected in accordance with the crane manufacturer’s or a qualified person’s reaimmendations. Erection shall be performed under the supervision of a qualified person.
(c) Procedures shall be established before erection work commences to implement the erection instructions and adapt them to the particular needs of the sitc. The need for temporary guying and bracing during erection shall be established,
(d) Before crane components are erected, they shall be visually inspected for damage t)arnaged members shall not be erected until repaired in accordance with the manufacturer’s or qualified person’s rnstructions or replaced.
(c) Slings and lifting accessories should Lw selected and arranged to avoid damaging or marring crane members during erection.
(f) Wind velocity at the site at the time of erection should be considered as a limiting factor that could require suspending the erection operation.
(g) Crane towers should be erected plumb to a tolerance that is spccified by the manufacturer,
ii) Cranes required to wealhcrvane when out of service shall be installed with clearance for the boom and superstructure to swing through a full 36(kteg arc without striking any fixed object or other crane.
4-1.1.3 Preoperation Procedures
(a) Alter erection, supports shall be tested, before placing the crane in service, using test loads that are 110% of rated load at the radius producing thc greatest load moment. Pedestal cranes shall be tested with the load rotated slowly to those positions that CaLise maximum loading of each foundation and then held for at least 15 mm at each critical position. Traveling cranes designed to travel with load shall be tested by slowly traveling the loaded crane the length of the runway with the crane oriented so as to cause maximum wheel loadings on one rail, then returning with the crane oriented to similarly load the tither rail. If not designed to travel with load, traveling cranes shall also be tested as for a stationary crane in each operating location.
Ui) During merload tests, care is required to maintain accelerations and decelerations below ordinary operational levels.
4-1.2.6 Altered (Moditled) Cranes
Whenever cranes and altered, unless the work is done by the original manufacturer, the owner of the crane shall maintain records of the work performed. The records shall include calcuLations and drawings prepared and signed by a qualified person that delineate the alterations and that verify that the entire crane and/or the alfected components satisfy the applicable portions of this Volume. The calculations shall include a recitation of the engineering criteria governing the design. For all altered cranes, records of tests required under para. 4-23.1(a) shall be maintained and should include a description of the tests performed. the rationale for selecting those test conditions, the date and ambient conditions at the time of testing, and the signature of the qualified person who supervised the tests.
SECTION 4-1.3: DOCUMENTATION
Each crane shall he provided with informational literature. including. hut not limited to, the following.
4-13.1 Site Preparation and Crane Support Design Data
For use oI the crane support designers, data such as what is listed below should be provided.
(a) vertical and horizontal forees and torsional and overturning moments applicable to the crane configuration and location o the particular installation; the data should indicate whether governing forces are due to in- service or out-of-service winds and the applicable wind velocities and direction(s); for traveling cranes, the data can be stated in terms of wheel or bogie loads
(b) maximum wind velocity for which traveling cranes possess adequate resistance to sliding, as determined by calculation, in the configuration br the particular installation and precautions that shall be taken to secure cranes at higher wind velocities
(c) rail track installation requirements and tolerances for traveling cranes
(d) anchorage arrangements for cranes to be installed on fixed bases
(e) crane dimensional data
4-1.3.2 Erection Instructions
For the use of crane erection personnel, data such as what is listed below should be provided.
(a) weight and dimensions for components and subassemhlies.