Florida Building Code Practice Exam 2025 - Free Building Code Practice Questions and Study Guide

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What is the required moisture content for fire-retardant-treated lumber?

15% or less

19% or less

The required moisture content for fire-retardant-treated lumber is indeed 19% or less. This specification is crucial because maintaining the moisture content below this threshold helps ensure that the fire-retardant chemicals applied to the wood are effective and that the lumber performs as intended during a fire scenario.

Wood with a higher moisture content can lead to several issues. Firstly, it may reduce the effectiveness of fire-retardant treatments, limiting their capacity to slow down the spread of flames. Additionally, elevated moisture levels can contribute to decay and mold, compromising the structural integrity of the lumber and potentially creating safety hazards in building applications.

This emphasis on a maximum moisture content of 19% is consistent with building code requirements designed to ensure that treated lumber meets standards for safety and performance in regards to fire resistance.

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22% or less

25% or less

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