What is a requirement for deck guard posts?

Deck guard posts are essential for ensuring the safety and structural integrity of a deck. The requirement that they must be 4x4 or larger and not notched is based on building codes and safety standards.

Using 4x4 lumber or larger provides sufficient strength and stability to support the load that may be placed on the guardrail system. This is especially important because guardrails are meant to prevent accidental falls and must be robust enough to withstand forces applied by individuals leaning against them or by other external loads.

The stipulation that guard posts must not be notched is critical, as notching can significantly reduce the structural integrity of the post, leading to potential failure under load. A solid, unaltered 4x4 or larger post maintains its strength and stability, ensuring the deck safely supports its intended use.

Other choices suggest dimensions or materials that either do not meet safety standards or are not universally required for deck guard posts. Hence, the specified size and the stipulation against notching play a key role in ensuring that deck guard posts perform their function effectively and safely.