Forward reach when that is the only approach available is 15" to 48". If the approach allows a side reach the limits are 9" and 53". If the reach is obstructed by an object there is a chart that diminishes the max and min height based on the depth of the obstruction.
4.2.5* Forward Reach. If the clear floor space only allows forward approach to an object, the maximum high forward reach allowed shall be 48 in (1220 mm) (see Fig. 5 and Fig. 5(a)). The minimum low forward reach is 15 in (380 mm). If the high forward reach is over an obstruction, reach and clearances shall be as shown in Fig. 5(b).
4.2.6* Side Reach. If the clear floor space allows parallel approach by a person in a wheelchair, the maximum high side reach allowed shall be 54 in (1370 mm) and the low side reach shall be no less than 9 in (230 mm) above the floor (Fig 6, Fig. 6(a) and Fig (b)). If the side reach is over an obstruction, the reach and clearances shall be as shown in Fig 6(c).
[This message has been edited by BEAMEUP (edited 09-02-2005).]