What is the minimum diameter of an 80-grade felling chain used for demolition purposes?

The minimum diameter for an 80-grade felling chain used in demolition work is 8mm. This specification is crucial because chains utilized for such tasks must be robust enough to withstand significant forces and impacts. The 80-grade designation indicates the strength and durability of the chain, making 8mm the minimum diameter that ensures safe and effective performance during demolition operations. Utilizing a chain of this diameter helps minimize the risk of failure under load, providing a balance between flexibility and strength required in rigorous applications.

When considering the alternative sizes listed, such as 6mm, 10mm, and 12mm, these either do not meet the minimum strength requirements or exceed what is typically necessary for standard felling operations, potentially leading to inefficiencies or excessive weight without added benefit. Thus, 8mm is established as the standard for safety and functionality in this context.