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Note: If you intend to use the recessed end configuration, cross-cabling can be installed in the
second bay, rather than the first (with ground connections to 3rd beam rather than 2nd).
After all overhead SpanLatch™ purlins have been engaged between the first two beams, install
eave purlins and attach the turnbuckle (hanging) ends of all cross-cabling to form the X’s shown
below (and on page 15) in the end bay of the building. (Note: Eave purlins are double latched
purlins, with SpanLatches on both ends.) To install them, simply raise the purlin above the purlin
spacer at the eave bolt, with the jaws of the SpanLatch™ purlin facing downward. Then, pull the
purlin downward until both SpanLatches engage. (An exception to this procedure occurs in struc-
tures with only 3 beams total. In 3-beamed structures, eave purlins will be standard SpanLatch™
purlins, with one fixed end and one latching end.) After the structure is vertically aligned and
cross-cabled, continue raising beams by the same technique, using the purlin hook poles to secure
each new beam to the standing beams, until all beams are erect (see bottom of page 15). The
cabling pattern will be repeated (usually in the last and final bay), although it is acceptable for the
cabling to be installed in any (2) bays of the structure.
Safety Lines
2nd beam pivoted same as
1st, but secured by SpanLatch
Purlins, rather that diagonal
brace.
Attach lower ends (turnbuckles) to upper holes in
SpanLatch purlin ends. Connect ALL cross-cables
loose. Then, tighten in sequence from the ground up,
while vertically aligning the beam.
Double-Latch purlins at eave (Except in
structures of only 3 beams, which have Single
SpanLatch purlins at eaves.)
Push SpanLatch above joint, then hook and
pull purlin downward onto Purlin Spacer to
engage and latch. Use short purlin tool on
low purlins, long purlin tool on high purlins
Engage SpanLatch Purlins between 1st & 2nd beam
Stabilize structure with cross-cabling
