Special Structures (continued)

The components of a step are: the rise, the run, a landing on easier grades, and often retainer logs (Figure 66). The rise is the vertical distance gained at the face of each step. The run is the distance from the edge of one step to the base of the next step's face. The landing is the extension of the run above the step. In structures where the landing is composed of tamped fill material, retainer logs are used to retain the fill.

Figure 66—Common types of steps.

 E-mail: wo_mtdc_webmaster@fs.fed.us