19
CLEARSPAN
™
MAJESTIC GREENHOUSES
Revision date: 06.21.16
FRAME ASSEMBLY (CONTINUED)
5. Position the purlin as needed and tighten the cross-
connector bolts.
6. Install a Tek screw through the cross-connector and
through the pipe joint in the purlin as shown above.
7. Return to the end rafter and verify that approximately
half-an-inch of the center purlin extends through the
pipe strap. Move the chord if needed and tighten the
Tek screws that secure the pipe strap to the chord.
REMEMBER:
To prevent damage to the end panels,
the center purlin must not extend beyond the edge of
the chord.
8. Install a Tek screw through the pipe strap and into the
center purlin.
9. Repeat the above steps for the remaining inside rafter
assemblies and work toward the remaining end of the
shelter.
NOTE
: Differences in how the rafters were assembled
and how the center was located on the chord can
cause the center purlin to appear off center. It may
be necessary to "adjust" the center purlin so that its
appearance is in line with the purlin at the top or peak
of the rafter.
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 pipe joint of
the purlin.
10. At the remaining end rafter, repeat the steps to secure
the center purlin to the chord of the end rafter.
11. After the final purlin is attached to the end rafter,
continue with squaring the assembled frame.
Center Purlin
Chord
Tek Screw
SQUARING THE ASSEMBLED FRAME
SPECIAL NOTE:
Additional bays are attached to the first
bay. To ensure that subsequent bays are square,
the first
bay must be square
. The gutter system and connectors
used to join the additional bays to the first bay will not
install correctly if the frames are not properly squared after
they are assembled.
If the
Lay Out the Building Site
procedure was completed
as presented near the beginning of this document, use the
lines marked on the site to align the rafters and to adjust
the width of the rafters as needed.
Rafter width is measured from center of one leg to the
center of the other leg on the same rafter assembly.
If the framework was assembled on the site without using
the recommended treated lumber, complete these step to
square the assembled frame.
1. Align all rafters using a straight line (if needed) or the
marks on the site from the
Lay Out the Building Site
procedure completed earlier.
2. Beginning with the first rafter, verify that the on-center
rafter width is equal to the width of the building and
adjust if needed.
To insure that the proper on-center width is maintained
for the length of the building and for each rafter, it is
important to measure each rafter and to adjust the
width (if needed) to maintain a consistent width. Pulling
the feet together can do this. Width is measured center-
to-center.
3. After adjusting the rafters, perform a final square of the
structure by measuring diagonally (corner-to-corner),
and verify that the two measurements are equal.
Top View
Frame may show a different but similar model.
