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Decorwall block.

The reason for developing these blocks was to create a cost-effective retaining block. The block is special because of the unique side-wall shape of the block that allows greater contact with the block below, and thus reduces the chance of block cracking under high wall loads.

Only 10.5 blocks are require per square meter (most opposition blocks have 12 blocks per square meter) which in turn saves on transport and labour on installation of the retaining block.


Wall height graphs for different back slopes using Decorwall Blocks
No Surcharge - Top Soil Infill - Internal Friction Angle 30°

Graph 1a. Wall height for different back slopes

Graph 1b. Keyless height of wall for different back slopes

Wall height graphs for different back slopes using Decorwall Blocks
No Surcharge - Top Soil Infill - Internal Friction Angle 26°

Graph 2a. Wall height for different back slopes

Graph 2b. Keyless height of wall for different back slopes

How to use these graphs for conceptual design
Final designs to be refered to a Professional Competent Person

SCENARIO 1: (max wall height for different back slopes; either graph 1a or 2a)

PART A

  1. Determine the internal friction angle of the soil (Graph 1 = 30°; Graph 2 = 26°)
  2. Determine the backslope angle of the soil in degrees
  3. Determine the proposed wall inclination angle in degrees
  4. Choose the corresponding wall inclination angle on the horisontal axis of the graph and draw a vertical line untill it intersec the backslope curve as determined above
  5. Now draw a horisontal line from the intersection point to the vertical axis to the left and read the allowable wall height for the wall
PART B Choose the appropriate graph refering to Keyless Height (either graph 1B or 2B with other similar parameters as chosen above.)
  1. Choose the corresponding wall inclination angle on the horisontal axis of the graph and draw a vertical line untill it intersec the backslope curve as determined above
  2. Now draw a horisontal line from the intersection point to the vertical axis to the left and read the allowable keyless wall height for the wall
# Determine the height to be supplied with keys from the bottom of the wall by calculating
the difference between Wall height and Keyless Height as determined above


SCENARIO 2 alternatively: (max wall inclination angle for wall; either graph 1a or 2a)

PART A

  1. Determine the internal friction angle of the soil (Graph 1 = 30°; Graph 2 = 26°)
  2. Determine the backslope angle of the soil in degrees
  3. Determine the proposed wall height in meters
  4. Choose the corresponding wall height on the vertical axis of the graph and draw a horisontal line untill it intersec the backslope curve as determined above
  5. Now draw a vertical line from the intersection point to the horisontal axis to the bottom and read the allowable wall inclination angle for the wall
PART B

Choose the appropriate graph refering to Keyless Height (either graph 1B or 2B with other similar parameters as chosen above.)

  1. Choose the corresponding wall inclination angle on the horisontal axis of the graph and draw a vertical line untill it intersec the backslope curve as determined above
  2. Now draw a horisontal line from the intersection point to the vertical axis to the left and read the allowable keyless wall height for the wall
# Determine the height to be supplied with keys from the bottom of the wall by calculating
the difference between Wall height and Keyless Height as determined above


Please consult us for more applications and details about this product.


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