Grab rails should be installed in commercial premises in accordance with Part M of the Building Regulations to give the user assistance and reassurance. Wheelchair and ambulant users when transferring to and from their chair may need the aid of horizontal support rails. The rail on the open side of a WC should be of the drop down variety, on the wall side a wall mounted horizontal grab rail should be installed in accordance with the distances shown below - Unisex Wheelchair Accessible WC

Alternatively when the side wall horizontal rail is set to the minimum distance an additional drop-down rail can be provided at a 320mm distance from the centre line of the WC.