Understair Storage – Drawer System

Turn wasted stair-void space into usable, functional storage with a fully-parametric drawer module that drops straight into any shaped understair cabinet.

This system builds a complete shaped drawer box that perfectly follows the internal slope of your cabinet. Every part is driven by user parameters, so you control the exact geometry — no manual editing, no guesswork.

What You Control

• Runner size — set your preferred runner length so the drawer slides to the perfect depth
• Drawer depth — define the internal storage space that works for your layout
• Left and right side angles — match the internal cabinet shape precisely
• Adjustable shelves — choose how many, set repetition, spacing, and hole patterns
• Optional fixed shelf — lock in a structural shelf with selectable end position
• Custom side gaps — dial in your clearances for clean CNC output and smooth fitment
• Open it for your detailed plans to show the client!

What It Delivers

• A fully shaped pull-out that tracks the exact slope of your understair carcass
• Automatic machining for shelves and sides — pre-drills, dados, everything handled
• Clean S2M-ready geometry with no hand-editing
• Perfect for brooms, linen, bulk storage, hidden cleaning supplies, or general organisation
• Fast to configure, accurate to build, and repeatable for any stair pitch or cabinet width

Why It Works

The program handles the geometry for you.
You just enter the angles, shelf count, runner length, and depth — the UCS builds the rest, ensuring the drawer box fits tight, opens cleanly, and uses every bit of available space.