Table 1. Variation of interaction equation value as function of type of debris clogging the joint.
| Season | Pinned | Gravel | Mix of Gravel and Sand |
Sand |
|---|---|---|---|---|
| winter | 2.2 | 1.8 | 1.6 | 1.4 |
| spring | 1.8 | 1.5 | 1.4 | 1.2 |
| summer | 1.5 | 1.3 | 1.2 | 1.0 |
| fall | 1.8 | 1.5 | 1.4 | 1.2 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.