This specification applies to the welding of all principal structural weldments and all primary welds used in the manufacture of cranes for industrial, mill, power house, and nuclear facilities. It also applies to other overhead material handling machinery and equipment that support and transport loads within the design rating, vertically or horizontally, during normal operations. It also applies, when agreed upon between the purchaser and manufacturer, to loading caused by abnormal operations or environmental events, such as seismic loading.
Secondary welds that will be subjected to stresses of less than 5000 psi (34.5 MPa)(Footnote 1) need only meet the requirements of Section 5, Workmanship, and Section 8, Weld Quality and Inspection. The engineering drawings shall specify the joint detail, type, and size of weld. This specification is not intended for application to construction- or crawler-type cranes. For the welding of rails, refer to ANSI/AWS D15.2-93, Recommended Practice for the Welding of Rails and Related Rail Components for Use by Rail Vehicles.
All provisions of this specification are equally applicable to the strengthening and repairing of existing overhead cranes and material handling equipment as described above.
Footnote 1. – The primary units in this specification are U.S. Customary Units. Approximate conversions to SI are given in parentheses throughout the specification.
