What are the dimensions for Type 1 circular deck handrails?

Type 1 circular deck handrails have specific dimensional requirements for safety and usability, which are outlined in the relevant building codes and regulations. The correct answer states that the diameter should be between 1 1/4 inches and 2 inches. This range is designed to ensure that the handrail is comfortable to grasp for users while providing adequate support and structural integrity.

Handrails that fall within this diameter range are typically easy to grip for individuals of varying hand sizes, which is important for safety, especially in emergency or transitional situations. A diameter too small may compromise grip strength, while a diameter too large could make it difficult for users to securely hold onto the rail.

The other options either exceed the recommended diameter range or fall below it, making them unsuitable for Type 1 circular deck handrails as defined by safety standards. Thus, a diameter between 1 1/4 inches and 2 inches is established to meet these ergonomic and safety requirements effectively.