36 CFR Part 1194 - Information and Communication Technology (ICT) Final Standards and Guidelines (with amendments issued through Jan. 2018)

407.8.1 Vertical Reference Plane.

Operable parts shall be positioned for a side reach or a forward reach determined with respect to a vertical reference plane. The vertical reference plane shall be located in conformance to 407.8.2 or 407.8.3.

407.8.1.1 Vertical Plane for Side Reach.

Where a side reach is provided, the vertical reference plane shall be 48 inches (1220 mm) long minimum.

407.8.1.2 Vertical Plane for Forward Reach.

Where a forward reach is provided, the vertical reference plane shall be 30 inches (760 mm) long minimum.