Decks greater than _____ feet above grade should have diagonal bracing from posts to girder.

Decks greater than 6 feet above grade should have diagonal bracing from posts to the girder to enhance structural stability and support. This requirement is crucial because as the height of a deck increases, the potential for lateral movement and instability also increases. Diagonal bracing provides additional support by preventing sway and ensuring that the weight and forces acting on the deck are effectively transferred down to the foundation, reducing the risk of structural failure.

Installing diagonal bracing at this height is a part of good construction practices and building codes to ensure safety. It helps to maintain the integrity of the deck, especially in areas where high winds or other environmental factors could pose a risk to the structure. This standard is recognized in both national building codes and local regulations, making it an important consideration for anyone involved in constructing or inspecting decks.