Fire-retardant-treated lumber must have a label that includes which of the following?

Fire-retardant-treated lumber must be properly labeled to ensure safety and compliance with applicable building codes. The label serves several important functions.

The identification mark of an approved agency is essential as it verifies that the treatment process meets specific standards and has been tested by a recognized organization. This gives assurance to builders and inspectors that the lumber has undergone rigorous evaluation to evaluate its fire resistance capabilities.

The name of the fire-retardant treatment is also included on the label. This information is crucial for both the manufacturers and builders as it hints at the chemical composition and treatment process, offering transparency and aiding in understanding how it will perform in a fire scenario.

Lastly, the flame spread and smoke developed index are critical values that indicate how the lumber will behave when exposed to fire. This information helps in assessing the relative risks in terms of how quickly flames might spread and how much smoke the material will generate during a fire, aiding in overall fire safety design considerations in commercial buildings.

Including all of these elements on the labeling ensures comprehensive information is readily available, which is necessary for informed decision-making in the construction and inspection processes.