What is the allowable weight for a lead roof flange?

The allowable weight for a lead roof flange is established to ensure proper performance and durability while adhering to building codes and safety standards. A lead roof flange is used in plumbing applications, particularly for venting. It must be lightweight enough to prevent damage or undue stress to the roofing structure or plumbing fixtures but heavy enough to provide adequate sealing and support.

The selection of 3 pounds as the allowable weight is based on industry standards that take into consideration the material properties and practical applications of lead. It balances the need for adequate strength with the desire to minimize weight for ease of installation and maintenance.

Other weights listed may be either too light, compromising the flange's effectiveness and stability, or too heavy, which could lead to installation issues or potential damage to the roof structure.