CLEARSPAN
™
STORAGE MASTER
18
PB02580R6N1D Revision date: 03.22.19
FRAME ASSEMBLY (CONTINUED)
ATTACH THE CHORD PURLIN
The chord purlin is attached to and runs
on top of the chord
throughout the length of the shelter. As before, regarding
all
end rafter purlin connections
, the chord purlin is attached
using a pipe strap. A cross-connector (#102548) is used
to secure the chord purlin to the chord of the inside rafters
only.
Complete these steps:
1. Locate the center of the chord of the end rafter and
install a pipe strap
on top of the chord
(if not installed
earlier).
Do not tighten at this time
.
2. Mark the center of the chord on the inside rafter and
mark the location. (A chalk line can also be used to
mark the center of each rafter chord. Refer to the
Lower Purlin procedure for details if needed.)
3. Assemble the first two sections of the remaining chord
purlin and position a cross-connector (#102548) for
1.66" pipe over the chord of the interior rafter.
4. Insert the purlin through the pipe strap (#QH1070) on
the chord (end rafter) and through the cross-connector
on the chord of the inside rafter.
REMEMBER:
The chord purlin runs
on top
of the
chord. Plain pipe end is in the pipe strap.
NOTE
: Differences in how the rafters were assembled
and how the center was marked on the chord can
cause the chord purlin to appear off center. It may
be necessary to "adjust" the chord purlin so that its
appearance is in line with the other purlins.
To achieve this, the cross-connectors can remain loose
after the purlin is inserted to allow a final viewing to
see if the purlin is centered. With the cross-connectors
loose, the purlin can then be tapped into the desired
position.
When the purlin appears centered, return to each
cross-connector, check to see that the pipes of the
purlin are properly seated, and tighten the bolts. Once
each cross-connector is tight, install a Tek screw
through the cross-connector and into the purlin.
5. Position the purlin as needed and tighten the cross-
connector bolts.
6. Install a Tek screw through the cross-connector and
through the purlin as shown above.
7. Return to the end rafter and verify that approximately
half-an-inch of the chord purlin extends through the
pipe strap. Adjust the chord (forward or backward) if
needed and tighten the Tek screws that secure the pipe
strap to the chord.
REMEMBER:
To prevent damage to the end panels,
the chord purlin must not extend beyond the edge of
the chord.
8. Install a Tek screw through the pipe strap and into the
chord purlin.
9. Repeat the above steps for the remaining inside rafter
assemblies and work toward the remaining end of the
shelter.
10. At the remaining end rafter, repeat the steps to secure
the chord purlin to the chord.
11. After attaching the final purlin, square the frame.
Chord Purlin
Chord
Tek Screw
Pipe Strap
Cross-connector
Chord Purlin