Steel straps and concrete/beam materials have different coefficients of thermal expansion. In hot weather (above 35°C/95°F), steel expands faster than concrete, inducing tensile stresses. If the stress exceeds concrete’s tensile strength — cracks appear, often parallel to the strap or at the beam-strap interface.
Engineers should look for:
The ATIR strap system is recognized in:
For hot crack applications (thermal >60°C), the engineer must calculate: atir strap and beamd with crack hot
Always obtain a structural engineer’s approval before applying ATIR straps to a load‑bearing beam with a thermally active crack. For hot crack applications (thermal >60°C), the engineer