A rear drain is recommended to have the proper clearance when rolling under the vanity.
Ada roll under sink dimensions.
Sinks must also have a 20 x 48 inch space in front of the sink to allow those in wheelchairs to get close enough.
The diagram at left shows how the ada required dimensions create an environment that is accessible to anyone.
Sinks must have 30 x 48 760 x 1220 mm of access.
The specifications allow space for plumbing enclosures and supports outside the minimum clearances.
According to ada accessibility guidelines ada compliant kitchen sinks must sit no higher than 34 inches above the floor and have shallow bowls between 5 and 6 1 2 inches deep.
Room and maneuver to all fixtures from a wheelchair.
There must also be knee clearance underneath the sink of 27 inches high 30 inches wide and 19 inches deep.
These requirements may be change depending on the specific application.
This means those in wheelchairs can tuck their legs below and comfortably use the sink.
Alternate roll in type shower compartments shall be 36 inches 915 mm wide and 60 inches 1525 mm deep minimum clear inside dimensions measured at center points of opposing sides.
No object can protrude into the required clearances other than the dip of the overflow at lavatories and sinks.
A 36 inch 915 mm wide minimum entry shall be provided at one end of the long side of the compartment.
Sink drains are located at the rear instead of the middle.
306 3 3 minimum required depth.
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The ada vanity cabinet or even a simple wall hung sink should have a knee clearance below of 27 inches high and be at a minimum 30 inches wide by 11 25 inches deep.
Check your local codes to be sure.
Space under an element between 9 inches 230 mm and 27 inches 685 mm above the finish floor or ground shall be considered knee clearance and shall comply with 306 3.
Other ada requirements for sinks.
A 9 high clear kick area by 6 deep at the floor should be maintained for a full height cabinet and be approximately ten inches deep according to the cabinet depth.
Knee clearance shall extend 25 inches 635 mm maximum under an element at 9 inches 230 mm above the finish floor or ground.
Knee and toe space must be at least 30 wide and up to 25 deep measured to the leading edge of the clear floor space.