How deep should the stub post for Class A Temporary sign supports be driven below the ground grade?

The required depth for driving a stub post for Class A Temporary sign supports is 42 inches below the ground grade to ensure stability and resistance to wind and other environmental factors. This depth provides the necessary anchoring to prevent the post from being easily dislodged, which is crucial for maintaining safety and visibility for road users.

When temporary signs are installed, particularly in areas with potential vehicular interaction, it is essential that they remain secure and upright. A stub post that is driven to this standardized depth ensures that the signs can withstand various conditions, such as strong winds or incidental contact.

Other depths, while potentially sufficient in some contexts, do not meet the established standards for Class A Temporary signs. Shallower depths may result in signs that are not adequately supported, increasing the risk of them falling or becoming misaligned, which could create hazards on the roadway. Thus, adhering to the guideline of 42 inches fosters a safer environment for drivers and pedestrians alike.