Final answer:
Glass used in handrail assemblies or guard sections should typically be at least 1/4 inch thick according to the International Building Code, but local building codes may vary. The exact thickness might also depend on safety requirements, and consulting local codes and professionals is advised.
Step-by-step explanation:
The thickness of glass used as a handrail assembly or a guard section should comply with building codes and standards, which often vary by location. The International Building Code (IBC), for example, typically requires the glass to be at least ¼ inch thick. However, the exact thickness may vary depending on specific applications, loads, and code requirements.
For safety reasons, the glass used in these applications is often tempered or laminated to prevent injury in case of breakage. It is crucial to consult the local building codes and work with a qualified structural engineer or architect to ensure compliance with the appropriate safety standards when selecting glass for handrails or guards.