Installation Guide

10 | Pergola Installation Guide
Step 7 – Install Purlin Holders
a) First, install one of the outside
purlin holders (2" x 3 ½") to your
box beam. Measure the correct
length of these according to figure
7a. – IMPORTANT - Make sure to
consider which direction you would
like to purlins to angle to provide
your desired amount of shade.
b) If necessary, cut outside purlin
holders to fit tightly between the
posts as in Figure 7a. IMPORTANT
- cut each holder from the side
marked CUT END. If you cut
the wrong end it will be difficult
to later line up the holes.
c) Attach outside purlin holder to
the box beam using the fasteners
labeled "outside purlin holder
to box beam." Make sure the
height of the top of the holder
matches the top of the beam.
d) Install
5
⁄
8
" plugs into the holes
on the outside purlin holder.
e) If necessary, measure and cut inside
purlin holders (1 ¾" square) to fit on
the top of each rafter. Make sure to
cut from the end labeled CUT END.
f) Using the fasteners labeled "inside
purlin holders to rafter", Install
these 1 ¾" purlin holders on top
of each rafter. IMPORTANT -
a. Be careful not to OVERTIGHTEN
these screw as they can crack
the purlin holder. It is helpful to
turn down the speed of your drill.
b. Make sure purlin holes are
angled the same direction as
the outside purlin holder.
c. Make sure that your screws
are spaced BETWEEN the
holes for the purlins.
d. Install a screw near each end
and one about every 2’ along
the purlin holder. It is helpful
to count the number of holes
on the holder and space the
screws evenly between
g) DO NOT install the remaining
outside purlin holder on the
other end. This happens AFTER
the purlins are installed.
7"
sq. Post
2"x8" Box Beam
2"x3½" Outside Purlin Holder
(Cut tight to fit)
Purlin
Direction
Measure Inside Post to Inside Post
Rafter Direction
2"x6" Rafter
1¾"sq. Inside Purlin Holder
Fastened on top of Rafter
7" sq. Post
2"x8" Box Beam
2"x3½" Outside Purlin Holder
Rafter Direction
Cut Inside Purlin Holder to fit
tightly between Box Beams
Figure 7a Figure 7b