What moisture content range indicates the fibre saturation point for most wood species?

The fibre saturation point (FSP) is a crucial concept in understanding wood's behavior regarding moisture content. For most wood species, the fibre saturation point is typically around 25% to 30% moisture content, but this threshold can vary between 20% and 30%. When wood reaches this point, the cell walls are fully saturated with water, while the cell cavities are filled with moisture.

Choosing 75 to 80 percent as the moisture content range reflects a misunderstanding of the fibre saturation point. At this level, wood would be extremely wet, far beyond the FSP, meaning the wood would be prone to issues like swelling and degradation.

The moisture content range that denotes the fibre saturation point accurately captures the point at which wood begins to change its physical properties due to moisture. Understanding where the fibre saturation point lies is essential for proper wood treatment and drying processes, allowing carpenters and woodworkers to effectively manage wood's properties during various stages of project development.