Building Design and Construction Handbook - Merritt - Ventech!

STRUCTURAL STEEL CONSTRUCTION 7.115
FIGURE 7.56 Slip-critical bolted column splices.
may be attached to either shaft with tack welds or clip angles. Usually it is attached
to the upper shaft, because a plate on the lower shaft may interfere with erection
of the beams that frame into the column web.
Somewhat similar are welded column splices. In Fig. 7.57a, a common case,
holes for erection purposes are generally supplied in the splice plates and column
flanges as shown. Some fabricators, however, prefer to avoid drilling and punching
of thick pieces, and use instead clip angles welded on the inside flanges of the
columns, one pair at diagonally opposite corners, or some similar arrangement,
Figure 7.57b and c corresponds to the bolted splices in Fig. 7.56c and d. The shop
and field welds for the welded butt plate in Fig. 7.57c may be reversed, to provide
erection clearance for beams seated just below the splice. The erection clip angles
would then be shop welded to the underside of the butt plate, and the field holes
would pierce the column web.
The butt-weld splice in Fig. 7.57d is the most efficient from the standpoint of
material saving. The depth of the bevel as given in the illustration is for the usual
column splice, in which moment is unimportant. However, should the joint be
subjected to considerable moment, the bevel may be deepened; but a 1 ⁄8-in minimum
shoulder should remain for the purpose of landing and plumbing the column. For
full moment capacity, a complete-penetration welded joint would be required.
STEEL ERECTION
A clear understanding of what the fabricator furnishes or does not furnish to the
erector, particularly on fabrication contracts that may call for delivery only, is all-