PISA SMOOTH™ Coping | Unilock Ontario
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Pisa Smooth is a new segmental retaining wall system providing a linear modern aesthetic to any landscape project. The ideally sized block provides fast, efficient installation, with many contractor friendly features. Using the built-in tongue and groove, Pisa Smooth can be constructed in a battered (slight lean) position, or in vertical orientation (some cuts required), giving the designer/installer a range of installation options. This wall system is ideal for garden walls or even large retaining walls, as well as pillars, planters and other hardscape elements.
Colors
Shape and size

COPING
550mm x 85mm x 350mm
21 3/4" x 3 3/8" x 13 7/8"

COPING
550mm x 85mm x 350mm
21 3/4" x 3 3/8" x 13 7/8"

COPING
550mm x 85mm x 350mm
21 3/4" x 3 3/8" x 13 7/8"

COPING
550mm x 85mm x 350mm
21 3/4" x 3 3/8" x 13 7/8"

COPING
550mm x 85mm x 350mm
21 3/4" x 3 3/8" x 13 7/8"

CORNER
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

CORNER
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

CORNER
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

CORNER
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

CORNER
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

CORNER JUMPER
550mm x 170mm x 275mm
21 3/4" x 6 3/4" x 10 7/8"

CORNER JUMPER
550mm x 170mm x 275mm
21 3/4" x 6 3/4" x 10 7/8"

CORNER JUMPER
550mm x 170mm x 275mm
21 3/4" x 6 3/4" x 10 7/8"

JUMPER
550mm x 170mm x 275mm
21 3/4" x 6 3/4" x 10 7/8"

JUMPER
550mm x 170mm x 275mm
21 3/4" x 6 3/4" x 10 7/8"

JUMPER
550mm x 170mm x 275mm
21 3/4" x 6 3/4" x 10 7/8"

STANDARD
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

STANDARD
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

STANDARD
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

STANDARD
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

STANDARD
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

COPING
550mm x 85mm x 350mm
21 3/4" x 3 3/8" x 13 7/8"

CORNER
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

CORNER JUMPER
550mm x 170mm x 275mm
21 3/4" x 6 3/4" x 10 7/8"

JUMPER
550mm x 170mm x 275mm
21 3/4" x 6 3/4" x 10 7/8"

STANDARD
550mm x 85mm x 275mm
21 3/4" x 3 3/8" x 10 7/8"

Technologies
Applications
Fire Feature
Garden Wall
Outdoor Kitchen
Pillars
Retaining Wall
Seat Wall
Water Features
Recommended Equipment
Retaining Wall Clamp
Technical information
  • Packaging
  • Things to know
  • Cross Sections
Select category
Packaging
  • Packaging
  • Things to know
  • Cross Sections
Unit Thickness (mm)
Layers per Bundle
FcFt per Bundle
FcFt per Layer
FcFt per Unit
Units per Bundle
Units per Layer
Lbs per Bundle
Lbs per Layer
Lbs per Section
Lbs per Unit
COPING
85
6
18.12
3.02
0.50
36
6
2,763
460.50
1,381.50
76.75
CORNER
85
6
36.24
6.04
0.76
48
8
2,880
480
1,440
60
STANDARD/CORNER
85
6
27.17
4.53
0.57
48
8
2,653.68
442.28
663.42
55.29
STD JUMPER/CORNER
170
3
27.17
9.06
1.13
24
8
2,652.24
884.08
-
110.51
THINGS TO KNOW

PISA SMOOTH

Applications – Design and build projects such as planters, steps, grill islands, pillars, seat walls and water features. Can be used for straight and curved installations (Radius 5’ is the tightest radius).

Capacity – Gravity walls up to 24” (1m). Geogrid reinforced walls can be built higher with engineering from a professional engineer.

Recommended Base Stabilization – one layer of DriveGrid™ stabilization grid between subgrade and base material. Use under Standard Base or Permeable Base.

Standard Base – Min. 6” – 8” of ¾” Crusher Run gravel (any road base standard in accordance with ASTM-D2940) compacted to 98% Standard Proctor Density (SPD).

Alternative Permeable Base – Min. 6” – 8” of ¾“ clear open-graded stone compacted to achieve full particle lock-up and consolidation. (Clear open-graded does not compact but does consolidate slightly by rattling the particles together.)

Leveling – Leveling retaining wall blocks directly on top of gravel is tedious and generally does not yield the best results. U-Grip Base units or universal base pads are recommended under all Unilock walls for improved accuracy and speedier installation.  Additional benefits include long term structural integrity and an overall better appearance.  Poured concrete leveling pads, reinforced with rebar, are also a great way to accomplish leveling, particularly for larger installations. You must ensure that the concrete is poured and finished perfectly in order to achieve a good visual appearance. 

Connection – features a tongue and groove connection between layers. Use appropriate concrete adhesive for connection between units where the key has been removed or for corners. Always read adhesive manufacturers’ directions prior to gluing.

Handling – Avoid bumping units against each other to prevent chipping.

Coping - This wall requires coping. Choose a manufactured coping such as Pisa Coping, Universal Coping or any of our natural stone coping options. Install with tight joints or 3/16” gap between units and amend with an exterior latex caulking. Cutting may be required; a diamond blade saw is required to cut coping properly. Glue all coping using a specially formulated concrete adhesive that is strong and will not break down over time. Always read adhesive manufacturers’ directions prior to gluing.