What is the term for a wooden or metal form used to create a roof drain opening in a poured-concrete deck?

The term for a wooden or metal form used to create a roof drain opening in a poured-concrete deck is referred to as a box-out.

In construction, box-outs are essential for ensuring that specific areas of the concrete are left open for drains, pipes, or other fixtures. The box-out is set in place before the concrete is poured, allowing it to retain the shape and size needed for the drain opening. This technique is crucial for proper drainage and preventing water accumulation on the roof, which can lead to structural issues or leaks.

Understanding the function of a box-out is vital for those working in plumbing and drainage systems, as it highlights the importance of accurate and effective planning during the construction phase. This ensures that all plumbing installations are integrated seamlessly into the building's structure.