how far apart can the posts on a guardrail be
The maximum distance between guardrail posts can vary depending on the jurisdiction, type of road, and other factors. However, here are some general guidelines:
* According to the Federal Highway Administration (FHWA), the maximum post spacing for guardrails on highways and freeways is typically 12.5 feet (3.8 meters) for steel posts and 6.25 feet (1.9 meters) for wood posts.
* The American Association of State Highway and Transportation Officials (AASHTO) recommends the following maximum post spacings:
+ 12.5 feet (3.8 meters) for steel posts on highways with design speeds over 45 mph (72 km/h).
+ 10 feet (3 meters) for steel posts on highways with design speeds between 30-45 mph (48-72 km/h).
+ 6.25 feet (1.9 meters) for wood posts on highways with design speeds over 30 mph (48 km/h).
* The Manual on Uniform Traffic Control Devices (MUTCD) also provides guidelines for guardrail post spacing, which vary depending on the type of road and the design speed.
It’s worth noting that these are general guidelines, and the actual post spacing may vary depending on local regulations, road conditions, and other factors. It’s always best to consult with local authorities or a qualified engineer to determine the specific requirements for a particular project.
