When nesting metal panels in low-slope systems, what is the required installation policy?

The required installation policy for nesting metal panels in low-slope systems emphasizes the importance of proper support to ensure structural integrity and performance. Installing the panels joist to joist, over a minimum of two spans and at least three joists, helps distribute weight effectively and reduces the risk of pooling water or stress on the panels. This method allows for better movement and flexibility of the materials due to thermal expansion and contraction, which can be particularly important in low-slope roofing applications where water runoff is a concern.

By ensuring that the installation covers multiple spans and is supported by several joists, the installation adheres to best practices that enhance the longevity and functionality of the roofing system. This approach also contributes to maintaining the overall design integrity, preventing issues such as sagging or premature failure of the roofing panels over time.