Back Overhang
Back Overhang:
![](https://irwinseating-images.s3.amazonaws.com/Misc/resource-overhang.png)
The back or chair overhang is the amount a chair extends beyond the chair size line. This is a critical consideration to eliminate interference with risers, walls, or support columns. The proper use of back overhang helps to eliminate hazardous gaps behind a row of chairs installed on treads and risers.