This is not meant to be a final authority as each project has its own set of unique situations.
Concrete block retaining wall design guide.
Walling guide no 4.
The intent of this material is to communicate the best practices for design of segmental retaining walls srw as determined by allan block corporation based on 25 plus years of research design and field experience.
Earthquake seismic design 7.
Forces on retaining walls 6.
Soil bearing and stability 8.
Follow the block manufacturer s instructions for wall height limits.
Soil mechanics simplified 4.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
Concrete block retaining wall construction consists of number of phases including excavation foundation soil preparation retaining wall base construction concrete block unit placement grouting and drainage system installation.
These phases are explained briefly.
These consists of a concrete or masonry wall of uniform thickness vertical wall reinforcing and transverse footing reinforcing are all designed for the lateral shear and cantilever bending movement plus the vertical weights of the wall footing and earth fills.
N ultimate load design with material factors based on characteristic soil properties partial load factors consistent with as 1170 1 and structure designs to as 3700 and as 3600.
The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block.
B short retaining walls vertical walls up to about 3m in height are usually built as shown in figure 1 b.
Design procedure overview 3.
Construction of concrete block retaining wall with steps.