Patent ID: 11920347
Assignee: NUCOR CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  E | IPC B  E

Claim 14:
15. A method of assembling a joist using the joist assembly system of claim 1, the method comprising:
picking the first upper chord portion and the first lower chord portion of a plurality of chord portions from the material supply station;
positioning the first upper chord portion and the first lower chord portion at the rigging table system;
retrieving the two or more webs from the material supply station;
positioning the two or more webs onto the first upper chord portion and the first lower chord portion at the rigging table system;
welding the two or more webs to the first upper chord portion and the first lower chord portion at the same time;
picking the second upper chord portion and the second lower chord portion of the plurality of chord portions from the material supply station;
positioning the second upper chord portion and the second lower chord portion onto the two or more webs at the rigging table system; and
welding the second upper chord portion and the second lower chord portion to the two or more webs at the same time.