How can a double header be reinforced when boxing a floor joist?

A double header can be reinforced when boxing a floor joist by installing strap hangers. Strap hangers are specifically designed to support additional weight and provide stability to joists and headers in construction. They help to secure the double header firmly against the joists, enhancing its load-bearing capacity and structural integrity.

While other methods, such as using additional wood blocks or metal brackets, may increase support, strap hangers are particularly effective as they distribute loads evenly and prevent movement. Plywood sheathing, on the other hand, is typically used for sheathing surfaces and does not directly reinforce structural elements like headers. Using strap hangers is a common and effective practice in plumbing and construction to ensure that double headers remain stable under load.