S Q U A R E U P T H E A R B O R
A T T A C H T H E B R A C E S T O T H E H E A D E R S A N D P A N E L S
Carefully tip your assembled arbor to the upright position and
check that the side panels are vertical and parallel.
Attach the four braces to the post, using the same technique as
for the header boards: drive the 2 1/2” screw through the bot-
tom hole in the brace so that it protrudes about 1/2”, and in-
sert the point into the pilot hole on the inner edge of the panel
frame. Then drive the screw in firmly.
Double-check your side panel posts to make sure they are
square with the header board and parallel to the post on the
other side.
When the position is set, hold the upper end of the brace
firmly in contact with the header and drive the screw in.
Tighten all screws in your assembly.
STEP 4
STEP 3
Now square up the arbor. This can be easily done with a large Carpenter’s Square, a tape measure, or even a length
of string as shown below.
S Q U A R E U P S E C O N D S I D E P A N E L & H E A D E R
When the arbor is squared up, drive the second screw at the top of each post into the lower pilot hole in the header.
Set post screw first
into pilot hole
Top screw into
back of header
Turn the assembly over so that the attached header board is on the upper side, with the free edge of the side panels
on the ground or working surface.
1. Measure the distance “a” at post tops.
2. Set bottom of posts to same spacing
“b”.
3. Measure diagonal distance “x”.
4. Check opposite diagonal distance “y”.
When a=b and x=y, the arbor is
pilot hole
carpenter’s
square
“x”
“y”
“a”
“b”
With a square:
With a tape measure or
