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PISA

The built-in setback design of Pisa automatically forms the correct slope, ensuring a highly stable retaining wall. Utilizing the product’s tapered components, you can form curved walls and steps.

Pisa2 75x300x300 Sandstone
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Pisa2 75x300x300 Sandstone
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PISA

The built-in setback design of Pisa automatically forms the correct slope, ensuring a highly stable retaining wall. Utilizing the product’s tapered components, you can form curved walls and steps.

Colors
Applications
Fire Features
Garden Walls
Non structural Wall
Outdoor Kitchen
Pillars
Structural Wall
Water Features
Shape and size
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12" COPING
300mm x 75mm x 300mm
11 7/8" x 3" x 11 7/8"
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12" COPING
300mm x 75mm x 300mm
11 7/8" x 3" x 11 7/8"
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12" COPING
300mm x 75mm x 300mm
11 7/8" x 3" x 11 7/8"
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12" COPING
300mm x 75mm x 300mm
11 7/8" x 3" x 11 7/8"
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CORNER 90 DOUBLE
300mm x 150mm x 200mm
11 7/8" x 5 7/8" x 7 7/8"
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CORNER 90 DOUBLE
300mm x 150mm x 200mm
11 7/8" x 5 7/8" x 7 7/8"
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CORNER 90 DOUBLE
300mm x 150mm x 200mm
11 7/8" x 5 7/8" x 7 7/8"
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CORNER 90 DOUBLE
300mm x 150mm x 200mm
11 7/8" x 5 7/8" x 7 7/8"
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TAPERED
200mm x 150mm x 300mm
7 7/8" x 5 7/8" x 11 7/8"
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TAPERED
200mm x 150mm x 300mm
7 7/8" x 5 7/8" x 11 7/8"
img
TAPERED
200mm x 150mm x 300mm
7 7/8" x 5 7/8" x 11 7/8"
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TAPERED
200mm x 150mm x 300mm
7 7/8" x 5 7/8" x 11 7/8"
Technologies
Technologies
Classic
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Classic

Our budget-friendly, Unilock Classic pavers and walls are manufactured to exceed as ASTM standards for quality and strength. Available in classic shapes and styles, these products utilize a traditional product mix of large and small aggregates, that is consistent from top to bottom, with color mixed throughout.

Our technologies
Colors
SANDSTONE
CHARCOAL
BEECHWOOD
GRANITE
Pick a color
SANDSTONE
CHARCOAL
BEECHWOOD
GRANITE
Information
Information
Packaging

Pisa

Pisa is the most versatile residential and commercial retaining wall block on the market today. Use Pisa to construct projects from low walls to high walls.

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 39” (1m). Geogrid reinforced walls up to 20 ft. (6.1m).

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. 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 – No specific handling instructions.

Coping - This wall requires coping. Choose a manufactured coping such as Unilock 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.

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
12" COPING
75
7
20.34
2.91
0.48
42
6
2,749.99
392.86
1,375
65.48
CORNER 90 DOUBLE
150
3
20.17
6.72
1.68
12
4
1,320
440
330
110
TAPERED
150
3
20
6.67
0.67
30
10
2,580
860
1,290
86

Knowledge
Center

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