General Mobile Toilet Size Drawings

The toilet stall sizes of general mobile toilets are mainly determined based on the door opening direction and the type of toilet fixture, as detailed below:

According to GB55031-2022 'General Code for Civil Buildings', the toilet stall sizes of mobile toilets must meet the net size requirements, which refer to the actual usable space size excluding walls or other structures. The code does not directly mention the overall size of 'mobile toilets', but it provides standards for toilet stalls in fixed public toilets, which are typically referenced in the design of mobile toilets.

1. Toilet Stall Sizes for Outward-Opening Doors

• Toilet Stall with a Sit-Down Toilet: The net size must be 0.9 meters (width) × 1.3 meters (depth). This size ensures that users have sufficient space to sit, stand up, and open and close the door without colliding with the door frame.
• Toilet Stall with a Squat Toilet: The net size must be 0.9 meters (width) × 1.2 meters (depth). Squatting requires slightly less space than sitting, but sufficient legroom must be reserved to prevent users from losing balance due to cramped space.

2. Toilet Stall Sizes for Inward-Opening Doors

• Toilet Stall with a Sit-Down Toilet: The net size must be 0.9 meters (width) × 1.5 meters (depth). Inward-opening doors require additional space for the door to open, so the depth is increased by 0.2 meters compared to outward-opening doors to ensure that the door can be fully opened without affecting user movement.
• Toilet Stall with a Squat Toilet: The net size must be 0.9 meters (width) × 1.4 meters (depth). Similarly, the depth of the squat toilet stall is increased by 0.2 meters to accommodate the inward-opening door structure.

3. Key Design Considerations

• Definition of Net Size: All dimensions refer to the usable space inside the toilet stall, excluding the thickness of walls, pipes, and other structures. When designing, additional space must be allocated for structural elements based on the material thickness (e.g., metal sheets, plastic sheets).
• Accessibility Requirements: If the mobile toilet needs to meet accessibility standards (e.g., for use by disabled individuals), the stall width typically needs to be increased to over 1.0 meter, and auxiliary facilities such as handrails and emergency call devices must be provided.
• Ventilation and Lighting: The depth of the toilet stall affects ventilation; excessive depth may lead to poor air circulation, which can be compensated for by increasing the number of exhaust vents or optimizing the layout.

The overall size of a mobile toilet must be comprehensively determined based on the number of toilet stalls, layout method (single row, double row, etc.), and additional functions (e.g., management room, storage room), but the net size of the toilet stalls is the core design consideration.