What thickness of glass can be heat-strengthened for greater strength?

Heat-strengthened glass is a type of glass that has been treated to increase its strength compared to standard annealed glass. The process of heat strengthening involves heating the glass to a high temperature and then cooling it rapidly, which induces internal stresses that enhance its load-bearing capacity.

The correct answer indicates that any thickness of glass can undergo the heat-strengthening process, meaning there is no limitation on the thickness when it comes to this treatment. This is significant in the glazing industry as it allows contractors to choose the appropriate thickness based on the application requirements while still benefiting from the enhancement in strength that heat-strengthening provides.

The other options imply restrictions that do not align with industry standards or practices. For example, stating that only thin or thick glass can be heat-strengthened overlooks the flexibility that glass manufacturers have to process various thicknesses without compromising strength enhancement capabilities. This adaptability is crucial for achieving the desired performance in a range of construction applications.