No set height, and when 902.3 applies
No provision in the Standards names baby changing stations. The height rule that reaches them comes through the work surface provisions, explained below.
Advisory 902.1 lists baby changing tables among its examples of work surfaces. Section 226.1 requires at least 5 percent of work surfaces provided for use by other than employees to comply with 902.
If a changing table is treated as a work surface, 902.3 sets its top at 28 in. minimum and 34 in. maximum. The authority having jurisdiction decides how that applies to your project.
How to measure an open and closed unit
Lower the bed and measure from the finish floor to the top of the changing surface. Where 902.3 applies, the reading has to fall between 28 and 34 in.
Close the unit and record two numbers: the height of its lowest leading edge and its depth from the wall. For an edge more than 27 in. and not more than 80 in. up, 307.2 limits the depth to 4 in. in a circulation path.
Last, measure the release latch or handle. Section 309.3 places operable parts within the 308 reach ranges, and 308.2.1 sets the unobstructed forward reach at 15 to 48 in.
Placement in toilet rooms and compartments
Keep the unit, open or closed, out of the required water closet clearance. The 604.3.2 overlap list names grab bars, dispensers, coat hooks, and shelves but not changing tables, and no other fixtures may sit there.
Advisory 604.8.1.1 says changing tables cannot obstruct the minimum wheelchair compartment space. A compartment built only to the minimum may not leave room to maneuver into position at the table, so plan a larger one.
The same advisory says convenience fixtures such as baby changing tables must be accessible to people with disabilities. That points back to the work surface, reach, operation, and projection rules for the unit itself.
Mistakes to avoid and what to check when buying
One error is mounting a changing station, horizontal or vertical, inside the minimum footprint of the wheelchair accessible compartment. Another is a closed unit projecting more than 4 in. into an aisle with its bottom edge above 27 in.
When comparing units, look at the closed projection on the drawing and the height of the bed surface once installed. Check the release too: 309.4 calls for one hand, no tight grasping, pinching, or wrist twisting, and 5 pounds of force maximum.
Recessed models reduce closed projection, which helps where the unit faces a circulation path. Confirm the installed depth on the manufacturer drawing rather than the catalog photo.
