Q355C channel steel is a long strip of steel with a groove shape, widely used in building structures, bridges, vehicle manufacturing, and other fields. The Chinese national standard GB/T 706-2016 specifies the dimensions, shape, weight, and permissible deviations for hot-rolled channel steel. The size series of channel steel includes various combinations of height and leg width to accommodate different design and load requirements. The material of channel steel is typically Q235, Q345, Q355, etc., with different yield strengths and chemical compositions. The production of channel steel must comply with national standards to ensure its quality and performance, meeting the needs of engineering applications.