Segmental retaining walls are built everyday where many are tall enough that they require reinforcement. The most common type of reinforcement is called geogrid. Geogrid is rolled out behind the wall at block course intervals, and should be a minimum of 60% of total wall height measured from the top of the base to the top of the top wall block.
Some applications, especially those with poor soil, may require geogrid layers to be significantly longer than 60% of the wall height. If you are unsure how to properly reinforce your wall, be sure to contact one of the Allan Block engineers @ (800) 899-5309 ext. 3 (ref. BP, Chapter 2.9)
Allan Block is working to achieve our industry initiative of Zero Wall Failures. With our Best Practices Manual and experience in the industry we are trying to expand the knowledge base for the design of segmental retaining walls (SRW's) by communicating and educating the professionals in the industry. To see the full Best Practices Manual, visit allanblock.com to download today and keep an eye out for more industry Best Practice recommendations here.