Collaborative Exercise on IRC Section R321.1.1 - Defining “Open Walking Surface”

[jar546]

I’d like to start a collaborative exercise focused on the term “open walking surface” within IRC 2024 Section R321.1.1. This section requires guards for open-sided walking surfaces over 30 inches above grade, but the IRC doesn’t define “walking surface” or “open walking surface,” leading to various interpretations. Let’s work together to establish a practical definition we can refer to, aiming for a more consistent application of guard requirements.

Note: The full 2024 IRC is available to read for free on their website if you’d like to review the exact verbiage.

Summary of IRC 2024 Section R321.1.1: Under Section R321.1.1, guards are required for open-sided walking surfaces, including floors, stairs, ramps, and landings, that are more than 30 inches (762 mm) above grade or floor level within 36 inches (914 mm) horizontally from the edge. While the code specifies where guards should be applied, it lacks a clear definition of what qualifies as a “walking surface,” creating gray areas in its application.

Example Scenario for Discussion: Consider a residential deck with a seating bench built along the edge and a raised planter box integrated into the deck. The deck itself is over 30 inches above grade, but the bench and planter are additional features. Here’s where we might see a difference in interpretation:

1. Does the entire deck, including the bench and planter, constitute an “open walking surface,” requiring guards around its perimeter?
2. Or should guards be required only along areas designed explicitly for foot traffic, like the main deck space?

Let’s dive into these questions and share how you currently interpret “walking surface” and whether auxiliary elements like benches or planters should require guards. By gathering a consensus, we can develop a definition that aligns safety and practical application across different projects.

Looking forward to everyone’s participation.