Galvanised Steel ‘H’ Beam Post 1200×100

Retaining Wall Selection Procedure

1. Select the appropriate design table(s) depending on whether or not there are fences located above the retaining wall.
   Go to Section 3.1 or 4.1 for retaining walls without fences above (up to a maximum of 1.8m high fence).
   It is noted that for retaining walls with fences above, refer to both Section 3.2.1 or 4.2.1 for general fence zones and Section 3.3.1 or 4.3.1 for the end zones of a fence (i.e. within 7.2 metres from the end of a fence)

2. Select the correct design table based on the backfill/subgrade material to be used for the retaining wall. 5 Different subgrade/backfill materials have been catered for,
   Namely:

• Gravel
• Medium Dense Sand (Medium Grained)
• Medium Dense Silty Sand/Fine Sand/Shales
• Stiff Clay

Note: We recommend for walls greater than 2m in height, geotechnical advice be sought to verify the nature of the subgrade/backfill materials to be adopted for the design.

100. The subgrade is the material into which the post is to be embedded and the backfill is the material that is placed and compacted behind the retaining wall.

500. Determine the actual height of the wall based on on-site measurement/survey

5. Determine the maximum post spacing for the wall height by referring to the relevant tables from step A. Choose the post spacing for which the maximum wall height is greater than
   the actual wall height determined in step C.

6. Determine the minimum post embedment depth based on the selected subgrade/backfill type, wall height, and post spacing.

* Installation Guide Facts Sheet