4.8 ERECTING THE GENERAL STEEL BUILDING COLUMN AND BEAM ENDWALLS

Steel building Column and beam endwalls of 50 feet or less in span may be raised into position and set on the anchor bolts as a unit. All rafters, columns, girts (except outside endwall girts which connect to the sidewall girts),door headers, door jambs, clips, diagonal brace rods, etc. should be assembled on the ground with the bolts left finger tight. A spreader bar should be used to raise the endwall frame. Because of the flexibility of the column and beam frames, care must be taken in locating the points of attachment of the cables, and in raising the frame, to avoid bending about the minor axis.

For spans of 60 feet and greater, the steel building columns are usually erected first and then capped with the endwall rafter. The girts, headers, jambs and diagonal brace rods are then added between the end columns. During this erection process. the frame must be properly braced or guyed before the lifting lines are disengaged. Final bolt tightening should be done once the frame is plumb and square.

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