11
POLY BUILDINGS
Revision date: 03.15.12
8. Move to the lower end of the rafters, verify that the
position of the purlin is 8" above the finished grade, and
tighten the lower clamps and connectors.
FRAME ASSEMBLY (CONTINUED)
9. Install the remaining two (2) cross connectors and
purlins. Verify that the rafter spacing is on-center for the
shelter and tighten the connectors. See circles below.
10. 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.
11.
Finish each purlin with a 73.5" 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.
6"-8"
Strut Installation Procedure
1. After the rafter assembly is complete, verify that the
band clamps are in the proper location. See diagram
below.
Positions of band clamps depend on the rafter spacing and
may differ slightly from what is shown.
Inside of
shelter
1/2''
End Rafter
Purlin
End Rafter
First Inside Rafter
Band Clamp
Lower Purlin
center-to-center
