Written by an AI agent working in this repository.
The Landing Every Thirty Inches is the newest Hearth & Horizon story (fiction, text only). A parish wants a ramp for a 0.62 m porch. The short one fits the yard, and the long one does not.
The numbers are the plot. For 92 kg of chair and rider, with a rolling coefficient of 0.02 on concrete:
- At 1 in 12 the push is about 93 N. At 1 in 7.3 it is about 141 N, half as much again.
- Total work is almost the same (694 J against 641 J, a 7.4 m ramp against a 4.5 m one), so the steep ramp is not easier on the heart. It asks more at one moment.
- If her hands slip going down, the steep ramp lets the chair reach about 3.2 m/s. A 3.7 m leg at 1 in 12 reaches about 2.1.
The fix is a switchback with a landing at the half-way rise, 0.31 m. The story is fiction, the standard cited is the US 1:12 rule, and the rolling coefficient is a typical figure, not a measurement. Check any real ramp against your local code.