King Post Retaining Walls
King post retaining walls are ideal for small garden projects as they are very effective in terms of their structural stability with the correct design and easy to install.
In simple terms, they are a structural fence that holds back the earth.
The design is a cantilever. The post is normally a steel column that is encased in concrete or driven into the ground.
The concrete infill panels are also structural as they also need to take the load and resist bending. The concrete infill panels are reinforced with steel to give structural stability.
It’s essential to have the king post retaining wall designed to ensure it works for the long term.
The type of soil will determine the depth required for the posts.
Once the king post retaining wall has been designed, the installation can be carried out by a specialist contractor.
King Post Retaining Wall Design Guide
The design table above are Indicative designs for king post retaining walls based upon a base material with allowable bearing pressure of >200kPa.
The design uses well graded, granular backfill with the back of the wall having drainage to relive hydrostatic pressure.
All indicative information presented in this table is based upon assumed loading and ground conditions and may be subject to change following detailed, site specific design.
Steel King Posts
The Steel beams can be hot dipped galvanised to prevent corrosion. Galvanising offers a modern style wall boasting a lifespan of 40-60 years.
Alternatively Steel beams can be painted Matt Black for a softer, more natural effect.
Being slimline, these beams take up minimal room maximising valuable space
King Post Concrete Panels
The concrete panels can either be plain smooth concrete or textured and even coloured textured. The images below show a range of timber and stone textured finishes.
The size of the panels differ from supplier to supplier. They are normally 1m, 1,2, and 1,5m in height. From 1m to 3m in length and 120,160,180 and 240mm in thickness. The size of the panel depends on the height of the wall and any design constraints.
King Post Retaining Wall Examples
Compare Prices of Retaining Wall Types
Which retaining wall type is the most economical to build? We have written an article on retaining wall price comparisons. The article details the types of retaining wall and gives you a price of each type for comparison.
King Post Retaining Wall Design Service
The design of a retaining wall requires knowledge of the retaining material, the water table, the ground bearing capacity and any site constraints. The design requires a ground investigation and a structural engineer to ensure the design is fit for purpose.
We offer a full design service from carrying out the ground investigation to final working drawings.
Other Retaining Wall Types
- L Shape Precast Concrete Retaining Walls
- Inclined Retaining Walls
- Reinforced Masonry Retaining Walls
- Reinforced Block Retaining Wall
- Gabion Basket Retaining Walls
- Masonry Retaining Walls
- Criblock Retaining Walls
- Flood Defence Retaining Walls
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My background is civil engineering from building a civil engineering construction company from 1990 to 2005. I have practical experience of building a large range of structures.