Minimum size of scaffold plank?

Minimum size of scaffold plank?

• A. 2"x 10"
• B. 1"x 6"
• C. 2"x 8"
• D. 4"x 10"

Answer: (A)

The safe standard for scaffold planks requires enough thickness and surface area to support a worker and tools without excessive flex or risk of failure. A 2-inch-thick by about 10-inch-wide board provides the essential strength and stability for typical scaffold spans. A thinner board (like 1x6) would be too weak, and a 2x8 is narrower than the common minimum width used in practice. A 4x10 is not necessary for normal scaffolds and adds unnecessary weight. In most settings, 2x10 planks are considered the minimum standard for scaffold platforms. (Note: actual lumber dimensions are slightly smaller than the nominal 2x10, but the nominal size communicates the required strength and surface area.)

The safe standard for scaffold planks requires enough thickness and surface area to support a worker and tools without excessive flex or risk of failure. A 2-inch-thick by about 10-inch-wide board provides the essential strength and stability for typical scaffold spans. A thinner board (like 1x6) would be too weak, and a 2x8 is narrower than the common minimum width used in practice. A 4x10 is not necessary for normal scaffolds and adds unnecessary weight. In most settings, 2x10 planks are considered the minimum standard for scaffold platforms. (Note: actual lumber dimensions are slightly smaller than the nominal 2x10, but the nominal size communicates the required strength and surface area.)