What is the minimum height of a deck guard above the deck walking surface?

The minimum height of a deck guard above the deck walking surface is established to ensure safety and prevent falls from elevated surfaces. According to building codes, including the International Residential Code (IRC), the height requirement for guardrails on decks is typically set at a minimum of 36 inches. This height is deemed effective in providing adequate protection for individuals who may be near the edge of the deck, reducing the risk of accidental falls.

The rationale behind this height is to create a balance between safety and usability, ensuring that the guard is tall enough to prevent individuals from easily toppling over while being low enough not to hinder activity or obstruct views. A guardrail of at least 36 inches fulfills this role effectively, which is why this answer is recognized as the correct choice. It's important for deck builders and homeowners to adhere to these standards to ensure safety for all users of the deck.