Are Your Stairs Safe for an Older Dog?

A staircase with a riser over 7.75 inches or a tread under 10 inches is steeper or shallower than the U.S. building code allows for human stairs (IRC R311.7.5.1) — a rough proxy for "unusually demanding," since there's no dog-specific stair standard. But for some conditions, no riser/tread combination is safe: a single step still pushes force through the spine. Enter your measurements and your dog's condition below.

Why building code, not a dog standard

No canine stair-safety code exists. IRC R311.7.5.1 is the closest objective yardstick available: it's the rise-and-run range a flight has to meet for a human to climb it comfortably. A flight inside that range is, at minimum, not an unusually steep or unusually shallow set of stairs — which is the standard most pre-built pet stairs and most household staircases get judged against in practice.

Making an existing staircase safer

If your stairs came back steeper than code, or you just want backup regardless of the numbers, these cover the two most common gaps: traction on the stairs themselves, and a gate for when no one's watching.

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