TABLE OF CONTENTS Cold-formed C and Z girts are similar in most respects to cold-formed purlins, except that, of course, the girts are used in walls, not roofs. The discussion of the available sections, basic design principles, continuity effects, and bracing needs for purlins largely applies to cold-formed girts as well. These and some other differences worthy of note are summarized below.
Unlike cold-formed purlins that pass over the building frames to take advantage of the continuity effects, light-gage girts can be positioned relative to columns in three different ways called insets. In bypass inset, the girts are located wholly outside the columns (Fig. 5.43a). Bypass girts can be simply bolted to the outside column flange, if web crippling is not a problem, or be connected by bearing clips otherwise.
Semiflush inset requires girt coping and allows some of the girt section to continue past the column (Fig. 5.43b). Bearing clips bolted to the outside column flange are typically required for attachment. (This design is not available from some manufacturers.)
Girts can also be positioned flush with the exterior of columns (Fig. 5.43c), being bolted to the column web with clip angles. Actually, the girts normally extend about 1 in past the column to allow for erection tolerances.
A close-up of the bypass girt assembly is shown in Fig. 5.44, and of the flush assembly in...
