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1991 ADA Standards for Accessible Design

Note: This document, portion of document or referenced document was published prior to the 2010 ADA Standards, and all or part of this information may only apply to Safe Harbored elements.

A4.2.5 & A4.2.6 Reach.

Reach ranges for persons seated in wheelchairs may be further clarified by Fig. A3(a). These drawings approximate in the plan view the information shown in Fig. 4, 5, and 6.

Plan view showing dimensions of adult-sized wheelchairs

Fig. A3 (a)

Clear floor space shown to be 30 by 48 inches minimum.

Fig. 4 Minimum Clear Floor Space for Wheelchairs

Clear floor space shown to be 30 by 48 inches minimum.

Fig. 4 Minimum Clear Floor Space for Wheelchairs

Clear floor space shown to be 30 by 48 inches minimum.

Fig. 4 Minimum Clear Floor Space for Wheelchairs

For a front approach, where the depth of the alcove is equal to or less than 24 inches (610 mm), the required clear floor space is 30 inches by 48 inches (760 mm by 1220 mm).  For a side approach, where the depth of the alcove is equal to or less than 15 inches (380 mm), the required clear floor space is 30 inches by 48 inches (760 mm by 1220 mm).

Fig. 4 Minimum Clear Floor Space for Wheelchairs

For a front approach, if the depth of the alcove is greater than 24 inches (610 mm), then in addition to the 30 inch (760 mm) width, a maneuvering clearance of 6 inches (150 mm) in width is required.  For a side approach, where the depth of the alcove is greater than 15 inches (380 mm), then in addition to the 48 inch (1220 mm) length, an additional maneuvering clearance of 12 inches in length (305 mm) is required.

Fig. 4 Minimum Clear Floor Space for Wheelchairs

Forward reach range shown in profile and plan view to be 48 inches maximum and 15 inches minimum.

Fig. 5 Forward Reach

The maximum level forward reach over an obstruction with knee space below is 25 inches (635 mm). When the obstruction is less than 20 inches (510 mm) deep, the maximum high forward reach is 48 inches (1220 mm). When the obstruction projects 20 to 25 inches (510 mm to 635 mm), the maximum high forward reach is 44 inches (1120 mm). (4.2.5, 4.25.3).

Fig. 5 Forward Reach

The 30 by 48 inch clear floor space is located a maximum 10 inches (255 mm) from the wall.

Fig. 6 Side Reach

The 30 by 48 inch wheelchair clear floor space is located a maximum 10 inches (255 mm) from the wall.

Fig. 6 Side Reach

If the depth of the obstruction is 24 inches (610 mm) and the maximum height of the obstruction is 34 inches (865 mm), the maximum high side reach over the obstruction is 46 inches (1170).

Fig. 6 Side Reach

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