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Step 3: Erecting the Structure
3.1 Preparation for Raising Arches:
NOTE:
The Diagonal Beam Braces and the Push Pole supplied in the instal-
lation kit will be used during the raising of the first and second arches.
3.1.1 Prior to raising the first arch connect the Diagonal Beam Braces to the uprights by inserting the top pin on the
Diagonal Beam Brace up through the second holes at top of the uprights as shown in
Figure 3.1a.
Secure to
the upright by using an R-Clip with string attached (R-Clip must have open-end toward top of rafter).
IMPORTANT:
Make sure the tube on the pinning end of the Diagonal Beam Brace is pointing upward as shown
in
Figure 3.2c,
otherwise the bottom of the upright on the second arch may be damaged.
3.1.2 Lay both of the Diagonal Beam Braces along and outside the second arch base plates as shown in
Figure 3.1c.
3.1.3 Connect Push pole to Ridge Weldment as shown in Figure 3.1b using R-Clip with string. (Similar to Diagonal Beam
Brace Connection as described above).
3.1.4 Verify that the R-Clips for the base plate L-Pins are placed on the second arch base plates so they are readily
available to secure the pinning end of the Diagonal Beam Brace to the L-Pins once the first arch is raised.
3.2 Raising the End Arch (First Arch):
Position three or more installers along the length of each rafter; one next to
the ridge, one or more at push pole on ridge, one at midpoint of rafter and one at the eave as shown in
Figure 3.2a.
Note that more installers may be required for larger width structures. This method of raising the arches requires coordi-
nation between workers for a safe installation. Use proper lifting techniques to protect the back by lifting with your legs.
3.2.1 Begin lifting the first arch in unison, being careful not to twist the arch. As the arch is lifted, the installers move
toward the uprights while maintaining contact with the arch. NOTE: The Diagonal Beam Braces will drag along
as the arch is lifted.
3.2.2 When the arch is nearly vertical and stable, one installer on each side can guide the tube on the pinning end of
the Diagonal Beam Brace onto the base plate L-Pin of the second arch as shown in
Figure 3.2c.
Secure the
Diagonal Beam Brace by installing the R-Clip.
3.2.3
IMPORTANT:
Ensure that the pinning end of the Diagonal Beam Brace is slid away from under the bottom of
the second arch uprights to allow clearance for the upright to pivot vertically when raising the second arch. If the
pinning end of the Diagonal Beam Brace is underneath the bottom of the upright, the upright will be damaged when
raising the second arch.
3.3 Raising the Second Arch:
Position installers as recommended for the first arch. See note in steps 3.2.3 before
raising the second arch.
3.3.1 Prior to raising the second arch, layout the eave, roof and ridge purlins in their respective position on the ground
adjacent to the first arch. To help expedite the stability of the second arch, connect the curved hook end of the
eave purlins to the brackets at the ends of the rafters on the first arch. The opposite end of the eave purlin can
rest on the ground until the second arch is in the vertical position.
3.3.2 Raise the second arch as described in steps 3.2.1 for the first arch. When the arch is vertical, one installer on each
side must swing the free end of the eave purlin, using the wide cradle purlin fork (supplied in the installation kit), to
drop the eave hook into the bracket at the ends of the rafters on the second arch as shown in
Figure 3.3a.
Use
the same technique and purlin fork to install the ridge purlin into the brackets at the ridges. Use the roof cables to
help sway the arch and align the purlin hook with the ridge bracket.
3.3.3 Using the same technique with the narrow cradle purlin fork (supplied in the installation kit), install the remaining
roof purlins, making sure that the curved hook on the roof purlin is properly engaged in the rafter bracket before
swinging the opposite end in place as shown in
Figure 3.3b.
3.3.4 The installation of the remaining arches will utilize the same technique described in steps 3.3.1 thru 3.3.3.
