Cross Section Landscape View

Building Steps

The versatility of building steps is only limited by your imagination. Steps can be designed with flowing curves or with right angles.

The simplest step design combines Wallstone® standard unitswith corner units and Wallstone® capping as step treads.

Alternatively, C&M bullnose pavers may be used as step treads.

UndisturbedNative Soil

Foundation Soil

Compacted Granular Footing 20mm Clean Stone

Wallstone® Stacking Unit 90mm Ag Drainage Pipe

Wallstone® Capping Unit Top Soil

Maximum Heights (Before Capping)Wallstone® & Wallstone® Grande: Setback Wall - 750mm

Wallstone® & Wallstone® Grande: Vertical Wall - 600mm

ie. no surcharge loading and site soils consisting of rock,

gravel or sandy gravel (not sandy or silty clays).

Typical Surcharge Loadings Are:• Wall supporting a driveway or any other load• Greater than 3:1 slope above the wall• Another retaining wall above the wall which is less

in distance behind the wall than double the height of the lower wall.

If a wall exceeds the maximum recommended height or a surcharge loading applies please ask C&M for help or consult an engineer for design.

Typical Cross Section

WallstoneInstallation Guide

®

Step 1 Dig a shallow trench, level and place 100mm of crushed rock in the bottom. Level and compact.Allow for 75mm embedment of the bottom course and 300mm behind the wall for drainage.

Step 2 Spread and level approximately 25mm of coarse sand as a bedding layer then place the first course of Wallstone®. Use a stringline for creating a straight line, and level from side to side and front to back. Install a 90mm Agricultural Pipe (on grade) at the rear of the wall for drainage.

Step 3 Fill behind each course with granular rock for drainage and carefully compact.Check each course is level before proceeding and stack each additional row offsetting from the block below.

Step 4 On the last course of stacking units, place a line of adhesive front and back and place the capping unit. Apply pressure to secure and use a stringline and level for the best result.

Note: • Slope the soil above and below the wall to ensure that water will flow away from and not accumulate near the wall.• It is advisable to place a dob of adhesive between corner units.

41 2 3

How to Build a Setback Wall

51 2 4

Step 1 Dig a shallow trench, level and place 100mm of crushed rock in the bottom. Level and compact.Allow for 75mm embedment of the bottom course and 300mm behind the wall for drainage.

Step 2 Spread and level approximately 25mm of coarse sand as a bedding layer then place the first course of Wallstone®. Use a stringline for creating a straight line, and level from side to side and front to back. Install a 90mm Agricultural Pipe (on grade) at the rear of the wall for drainage.

Step 3 Remove the top rear section (NOT the bottom rear lip) from the Wallstone® or Wallstone® Grande block with a bolster chisel. A groove on the top clearly indicates this removable section.

Step 4 Fill behind each course with granular rock for drainage and carefully compact.Check each course is level before proceeding and stack each additional row offsetting from the block below.

Step 5 On the last course of stacking units, place a line of adhesive front and back and place the capping unit. Apply pressure to secure and use a stringline and level for the best result.

Note: • Slope the soil above and below the wall to ensure that water will flow away from and not accumulate near the wall.• It is advisable to place a dob of adhesive between corner units.

How to Build a Vertical Wall

3