What is the recommended position for the rolling straightedge during calibration?

The recommended position for the rolling straightedge during calibration is next to the manual straightedge. This position ensures that the rolling straightedge can effectively compare elevations and smoothness against a standard reference provided by the manual straightedge. By placing it in close proximity, the operator can accurately assess any discrepancies in the roadway surface, which is critical for maintaining the quality of the asphalt pavement. Checking the rolling straightedge against the manual straightedge helps identify any bumps or dips that may not be within the acceptable tolerances, thereby allowing for necessary adjustments to be made before proceeding with paving.

Calibration is essential to ensure that the equipment is functioning properly and providing reliable results, and having both straightedges aligned facilitates better accuracy in measurements. This method supports the overall goal of achieving a smooth and high-quality pavement surface, which is vital for long-term roadway performance.