PISA SMOOTH^™

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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.

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Tech Sheet

Colors

Shape and size

COPING
400mm x 75mm x 325mm
15 3/4" x 3" x 12 7/8"

CORNER
400mm x 150mm x 200mm
15 3/4" x 5 7/8" x 7 7/8"

XL TAPERED
400mm x 150mm x 300mm
15 3/4" x 5 7/8" x 11 7/8"

COPING
400mm x 75mm x 325mm
15 3/4" x 3" x 12 7/8"

CORNER
400mm x 150mm x 200mm
15 3/4" x 5 7/8" x 7 7/8"

XL TAPERED
400mm x 150mm x 300mm
15 3/4" x 5 7/8" x 11 7/8"

Technologies

Classic

Applications

Fire Feature

Garden Wall

Outdoor Kitchen

Pillars

Retaining Wall

Seat Wall

Step

Water Features

Technical information

Packaging
Things to know
Cross Sections

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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 Unit

CORNER

150

46.52

11.63

0.97

2,780.30

695.08

57.92

XL TAPERED

150

20.67

5.17

0.65

2,508.40

627.10

78.39

COPING

15.50

1.94

0.32

2,255.80

281.98

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.