[54] METHOD OF MANUFACTURING A
FABRICATED OPEN WEB STEEL JOIST
[75] Inventor: William J. Hannah, Mississauga, Canada
[73] Assignees: Gerald McDonald; Gloria H. Campbell
[21] Appl. No.: 145,270
[22] Filed: Jan. 19,1988
Related U.S. Application Data
[63] Continuation of Ser. No. 85,948, Aug. 17, 1987, Pat. No. 4,748,786.
[51] Int. CI.4 B23K 31/02
[52] U.S. CI 228/182; 29/155 R;
228/212
[58] Field of Search 29/155 R, 155 L;
52/664, 690, 691, 692, 693, 694, 730, 731, 732, 721; 228/5.1, 6.1, 182, 212, 213
[56] References Cited
U.S. PATENT DOCUMENTS
1,622,559 3/1927 Zabriskie 52/694 X
1,915,424 3/1928 Kerr 52/691
1,918,345 7/1933 McHose 52/694 X
1,983,632 11/1931 Miller et al 52/694
2,246,215 6/1941 Nagin et al 52/694 X
2,256,812 9/1941 Miller 29/155 R
2,624,430 5/1949 Macomber 52/694
2,662,272 12/1953 Macomber 29/155 R
3,626,567 12/1971 Michelson et al 29/155 R
3,636,604 1/1972 Gooder 29/155 R
3,639,962 2/1972 Gooder 29/155 R
4,207,719 6/1980 Knowles 52/693
FOREIGN PATENT DOCUMENTS
7314436 4/1975 Netherlands 228/6.1
1322754 7/1973 United Kingdom 52/694
Primary Examiner—Timothy V. Eley
Assistant Examiner—Andrew E. Rawlins
Attorney, Agent, or Firm—Donald E. Hewson
[57] ABSTRACT
A fabricated open web steel joist is provided. The top and bottom chords of the joist are each formed of reshaped angles, arranged in back-to-back relation; and the web is formed of a plurality of W-shaped preformed bar sections. Adjacent ends of each of the "W"'s are located between the opposed faces of the top chord. If the joist requires an odd number of panels, a "V" (a one-half "W") is inserted between two W's within the length of joint, usually at the centre thereof. The joist is welded, with each end and each apex of each "W" and "V" being welded to each of the chord components. The assembly of the joist includes the jig assembly and clamping of all of the components of the joist, welding only the adjacent ends of the "W"'s (and "V", if used) and the apexes of the "W"'s in the upper chord first, inverting the still clamped assembly, and welding the now upper located apexes in the bottom chord. The welding is carried out in a vertical-up manner, in each instance.
6 Claims, 4 Drawing Sheets
