®
Keystone
Step-by-Step Instructions
Mailbox Column
®
from concept to reality
Units used:
DETAIL "A"
OPTION #2
111
Mailbox Notes:
DETAIL “A”
222
333
Sem
This is an
advanced
• Use a semi rigid type of backing material
such
as a do-it-yourself project.
back
non-expandable spray foam as a form for the concrete grouting
• Cut Country Manor units as needed to accommodate
Plac
various mailbox sizes
of co
arou
OPTION #1
3" Cap
Mailbox built into column with
concrete grout to fill voids
if needed
Use
ope
Name plate is
attached flush
to pillar
DETAIL "A"
30" x 30" Keystone
Country Manor column
OPTION #2
Finished grade
Mailbox Notes:
12"
• Use a semi rigid type of backing material such as a
non-expandable spray foam as a form for the concrete grouting
• Cut Country Manor units as needed to accommodate
various mailbox sizes
A”
1
Difficulty Level : Advanced
3" Cap
Mailbox Notes:
• Use a semi rigid type of backing material such as
Mailbox
built into column with
a non-expandable spray foam as a form for
the
concrete
grout to fill voids
concrete grouting
• Cut Country Manor units as needed to
accommodate various mailbox sizes
Semi-rigid type of
backing material
Place a 4" band
of concrete grout
around mailbox
6" First course
embedment
6" Unreinforced concrete
or crushed stone
leveling pad
Use small blocks to create
opening to fit mailbox
if needed
Name plate is
attached flush
to pillar
30" x 30"
Keystone
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Country Manor column
Copyright Finished
© Keystonegrade
Retaining Wall Systems, Inc. • A CONTECH Company
Semi-rigid type of
4444 West 78th Street • Minneapolis, MN 55435
backing material
(952) 897-1040 • www.keystonewalls.com
Place a 4" band
Sem
back
Plac
of co
arou
Use
ope
Keystone
Step-by-Step Instructions
®
Mailbox Column
from concept to reality
Fill column center
core with clean
crushed stone
12"
Finished grade
6" First course
embedment
DETAIL "A"
OPTION #2
Fill column center
Step
1 : Prepare the location
core with clean
crushed
stone
After
selecting
your location, measure the
required 42" x 42" square for a 30" x 30"
column. Remove dirt from inside the 42"
square until the hole is 12”DETAIL
deep, level
“A”
#1 base.
the bottom and prepare it forOPTION
a rock
6" Unreinforced concrete
or crushed stone
leveling pad
DETAIL "A"
OPTION #2
Mailbox
3 : Install the first course
Step
2 Notes:
: Construct the leveling pad Mailbox Notes:Step
Semi-rigid type of
Semi-rigid type of
• Use a semi rigid type of backing material such as a • Use a semi rigid type of backing material such as a
the
first
place
the
units as backing material
For
Add
3”
of
crushed
stone.
Level
and
backing
material
non-expandable spray foam
as acourse,
form for the
concrete
grouting
non-expandable spray foam as a form for the concrete grouting
• Cut Country Manor
units as needed
to accommodate
illustrated
above.
The units should be Place a 4" band
compact
with
a units
hand
tamper.
Repeat one
• Cut Country
Manor
as needed
to accommodate
Mailbox
various mailboxPlace
sizes a 4" band
various mailbox sizes
of concrete grout
centered
within the 42" square and placed
of concrete grout
time
to complete the 6" leveling pad. Use
around
around
mailbox
Fill column
center grade. Check front to backmailbox
6" below
finished
illustration above as DETAIL
a guide.“A”
core with clean
3" Cap
3"
Cap
OPTION #1
stone
andcrushed
side to
side to make sure the column is
level.
Adjust
ascreate
necessary with sand. Use small blocks to
Use small
blocks to
Mailbox built into column with
concrete grout to fill voids
if needed
DETAIL "A"
OPTION #2
Fill column center
Use this block
configuration for
courses 2, 4, & 6.
12"
• Use a semi
rigidstone
type of backing material such as a
crushed
non-expandable spray foam as a form for the concrete grouting
• Cut Country Manor units as needed to accommodate
various mailbox sizes
Place a 4" band
of concrete grout
around mailbox
3" Cap
Mailbox built into column with
concrete grout to fill voids
if needed
Step 4 : Install the Name
second
plate course
is
attached of
flush
Place two ¼" wide strips
Keystone
to pillar
Kapseal adhesive completely around
30" x 30" Keystone
the first course approximately
3" away
Country Manor column
from the edge of the units. Place the
Finished grade
second course of units
on top of the
first course as illustrated above. Apply
Keystone Kapseal as before. Continue
6" First
course
to build the column, alternating
course
embedment
layouts as indicated.
6" Unreinforced concrete
Note: It is suggested that you dry
fit the second
or crushed
stone
pad before
course and each course of blocksleveling
thereafter
you apply the adhesive, to ensure you have the correct
orientation and correct blocks.
Use small blocks to create
opening to fit mailbox
Mailbox built into column with
opening to fit mailbox
concrete grout to fill voids
if needed
Name plate is
attached flush
to pillar
Name plate is
attached flush
to pillar
30" x 30" Keystone
Country Manor column
30" x 30" Keystone
Country Manor column
Finished grade
Semi-rigid type of
backing material
12"
Mailboxcore
Notes:
with clean
Use this block
configuration for
courses 1, 3, 5, & 7.
Mailbox
6" First course
embedment
6" Unreinforced concrete
or crushed stone
leveling pad
4"
Step 5 : install the first mailbox course
After completing the seventh course, you are
ready to build the mailbox layer. Place the
units as illustrated and secure with Kapseal.
Use a semi-rigid backing material, (e.g. a
Semi-rigid type of spray foam) to create a seal
non-expanding
backing material
4" behind the face of the mailbox. Then fill
Place a 4"the
band
around
mailbox with grout so that it’s Mailbox
of concrete grout
around
mailbox
flush
with
the mailbox face. Make sure that
the mailbox opens and closes freely. Grout
may require weatherproofing or sealant
Use small blocks to create
depending
on the type that is used.
opening to fit mailbox
opening to fit mailb
4"
Semi-rigid type ofFinished grade
backing material
Semi-rigid type of
backing material
Place a 4" band
of concrete grout
around mailbox
Place
a 4" band
Mailbox
of concrete grout
around mailbox
6" First course
embedment
6" Unreinforced concrete
or crushed stone
Use small blocks to create
opening to fit mailbox leveling pad
Use small blocks to
opening to fit mailb
4"
Step 6 : Install the second mailbox course
Install the second mailbox layer as illustrated
above and secure with Kapseal. Fill in
around mailbox as described in step 5. Finish
with the capping option of your choice.
We recommend a 3" solid cap stone that
measures approximately 36" square. Center
and secure in place with Kapseal.
4"
Note: The long side of the large unit will
always face the outside of the pillar. Inner
column produces a 10" x 10" center core.
Copyright © Keystone Retaining Wall Systems, Inc. • A CONTECH Company
4444 West 78th Street • Minneapolis, MN 55435
(952) 897-1040 • www.keystonewalls.com