How the Alternating Tread Stair Works
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How the Alternating Tread Stair Works |
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| CONVENTIONAL STAIR | STEEP STAIR | LAPEYRE STAIR |
| Imagine walking down (or up) a conventional stair. Each foot normally uses only about half of each tread, stepping our and over the unused sections (shaded red). | On a steeper stair or ladder, the unused half tread becomes an obstacle, significantly reducing the usable tread depth of the tread directly below. As the angle increases, the problem becomes worse. | In contrast, the Lapeyre stair removes the unused half of each tread, allowing the foot to reach the next tread in a straight, direct line, providing more usable tread depth. |