Accessible Unisex Toilet Room Layout
A general contractor is converting a 1,200-square-foot office suite into a small medical clinic. The plan shows one unisex accessible toilet room, 5 feet 0 inches wide by 8 feet 0 inches deep. The water closet is on the rear wall with its centerline 12 inches from the left sidewall. The lavatory is on the left sidewall, with its front rim 18 inches from the front of the water closet. The 32-inch door swings inward and stops against the lavatory. The contractor says the room passed rough framing inspection and wants to set fixtures. No floor drain is shown. The clinic will have six staff and a public waiting area, and the local jurisdiction enforces both the plumbing code and accessibility requirements.
1. Evaluate the water closet and lavatory clearances against the plumbing code. State the minimum dimensions and whether this layout complies.
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The water closet centerline must be at least 15 inches from a sidewall, and there must be at least 30 inches of clear width at the water closet. A centerline 12 inches from the left wall fails the 15-inch requirement, even though the room is wide enough on the other side. The lavatory front rim must leave at least 21 inches of clear space in front of the water closet; 18 inches fails. The inward door swing that stops against the lavatory also encroaches on the required clear floor space and accessible route. This layout does not comply. The water closet must shift at least 3 inches, the lavatory must move to provide 21 inches in front of the water closet, and the door must swing out or be relocated so it does not block the fixture clearances.
2. What corrections would you require before fixtures are installed, and what inspections should follow?
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I would require a revised layout showing the water closet centerline at least 15 inches from the sidewall, 30 inches clear width, and 21 inches clear in front of the water closet. The lavatory should be repositioned or replaced with a smaller fixture so it does not intrude into that space. The door should swing outward or be moved so the required clear floor space and accessible route are not obstructed. Verify grab-bar blocking and lavatory knee/toe clearance before walls close. The sequence should include a rough-in inspection after drain, waste, and vent work and blocking are complete, then a final inspection after fixtures are set and tested. The final inspection should confirm fixture clearances, water supply, drainage, and accessibility, not just that the fixtures operate.
3. The contractor proposes to skip a floor drain because the room is small and the clinic wants to save money. Is that acceptable under the plumbing code?
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A floor drain is not automatically required in every small toilet room; the code requires it only where specific conditions apply, such as certain public or commercial fixtures, equipment rooms, or local amendments. For this unisex toilet room, the lack of a floor drain is not the main defect. The serious defects are the fixture clearances and door swing. I would not accept the room based on the floor-drain argument. I would check the local plumbing code and the clinic’s use for any specific floor-drain requirement, but the layout must first be corrected to meet the water closet and lavatory clearances and the accessibility route.