The image shows a cross-section of a C T structural ring with the centreline marked C T and symmetric offsets of 500 on each side. Multiple temperature sensor identifiers are placed around the ring, including C T O D 1 4 2 C t T m p labels at the crown, haunches, and invert, and C T O D 1 3 5 S S T R S labels at the sides. A horizontal reference line passes through the section towards the bridge. On the right, a rectangular deck detail shows five equally spaced temperature sensors labelled T 1, T 2, T 3, T 4, and T 5 along the bridge direction, with distance 134 marked at both ends and associated C T O D 1 4 2 C t T m p identifiers above and below the sensor line.