What is the minimum distributed live load requirement for a deck?

The minimum distributed live load requirement for a deck is set to ensure that the structure can safely support the weight of people and objects on it. A standard requirement for residential decks is 40 pounds per square foot. This value is based on guidelines provided by building codes, which emphasize safety and structural integrity under typical use scenarios.

Choosing this value considers not just the weight of people but also potential additional loads such as furniture, grills, and other recreational items commonly placed on residential decks. Establishing a minimum load requirement helps ensure that decks are constructed robustly enough to handle everyday activities, thus protecting the safety of those using the deck.

Other options such as 20, 30, or 50 pounds per square foot reflect either insufficient or overly conservative load assumptions for typical residential deck use. The 40 pounds per square foot strikes a balance between safety, functionality, and practical construction considerations.