What value best describes the distance at which temperature reinforcement is placed relative to the main steel in walls?

• A. Perpendicular (right angles)
• B. In line with the main steel
• C. At a 45 degree angle
• D. At a variable angle depending on wall height

Answer: (A)

Temperature reinforcement is used to control cracking from temperature changes and concrete shrinkage. In walls, placing these small bars at right angles to the main reinforcement ensures that any cracks formed due to temperature movement are intercepted and bridged by the perpendicular bars. This orientation helps keep cracks narrow and distributes movement across the wall rather than letting cracks run along the length of the main reinforcement. The other orientations would be less effective at crossing and restraining potential cracks, so the perpendicular placement is the standard and best practice.