11
CLEARSPAN
™
POLY BUILDINGS
Revision date: 05.19.09
CAUTION:
To prevent cover damage, the ends of the
purlins should extend no more than ½'' past the end
clamp. See diagram that follows Step 14. Do not allow
purlin to extend beyond the edge of the end rafter.
9. Move to the lower clamp positions and repeat Step 7
to install the purlin pipes in those locations.
See the
diagram on the previous page following Step 6.
10. Slide a band clamp (#QH1400) on each of the two
bottom purlins between the second and third rafters.
Position the head of each band clamp bolt toward the
outside of the shelter.
11. Move to the lower end of the rafters, verify that the
position of the purlin is approximately 8" above the
top
of the pony wall
, and tighten the lower end clamps and
cross connectors.
FRAME ASSEMBLY (CONTINUED)
12. Install the remaining cross connectors and purlins.
Verify that the rafter spacing is on-center for the shelter
and tighten the end clamps and connectors.
13. Continue adding rafters and purlins until the frame is
nearly complete.
NOTE:
Remember to add band clamps to the lower
purlins between the second and third rafter at the
remaining end of the frame for the installation of the
struts. Review Step 1 to set the final end rafter.
14. Finish each purlin with a plain pipe and use the final
end rafter to complete the assembly.
NOTE:
To prevent cover damage, DO NOT allow the
purlin to extend beyond the end rafter.
If the last end rafter is plumb and the purlin run extends
beyond the end of the rafter, cut the last section of
purlin pipe to the required length.
Typically purlin pipes
do not
require cutting.
Verify that
the finished purlin run has the correct plain pipe before
cutting any pipe. Consult the Side Profile diagrams in
the Quick Start section for pipe identification.
CAUTION:
To prevent cover damage, the ends of the
purlins should extend no more than ½'' past the end
clamp. Position the bolt side of the end clamps to the
inside of the shelter as shown.
Inside of
shelter
1/2''
End Rafter
Purlin
Band Clamp
QH1400
Band Clamp
QH1400
center-to-
center
Step 10
8"
Step 11
5'
center-to-center
Step 12
