Standard Practice for Laser Technologies for Direct Measurement of Cross Sectional Shape of Pipeline and Conduit by Rotating Laser Diodes and CCTV Camera System

This document outlines a recognized technical practice for assessing the cross-sectional geometry of pipelines and culverts. The methodology relies on the integration of rotating laser diode technology with closed-circuit television camera systems to facilitate direct measurements. By employing these advanced optical instruments, the approach enables precise determination of shape irregularities and dimensional changes within subsurface structures. The procedure establishes a systematic framework for data acquisition, ensuring that field assessments are conducted with a high degree of repeatability and accuracy. It addresses the specific requirements for characterizing the internal profile of civil infrastructure without the need for physical contact with the surrounding medium. The guidelines provided serve to harmonize measurement techniques, allowing various operators to apply consistent protocols when evaluating the structural integrity of conduit systems. This practice contributes to the maintenance and inspection strategies used in infrastructure management by offering a reliable means to detect deformations, siltation, or other geometric anomalies that may affect flow capacity or structural safety.