Mobile Toilet Size Design Standards

The size design standards for mobile toilets should be comprehensively determined based on usage scenarios, functional requirements, and industry standards, as detailed below:

I. Overall External Dimensions

1. Single-Stall Specifications: Length 1.2-1.5 meters, width 1.0-1.2 meters, height 2.2-2.5 meters, suitable for small events or temporary venues.
2. Multi-Stall Combination Specifications: Two-stall units have a length of 2.4-3.0 meters and a width of 1.0-1.2 meters; large container-type mobile public toilets can exceed 6 meters in length and 2.5 meters in width, suitable for high-traffic areas.
3. Height Design: Considerations include internal clear height, roof structural strength, ventilation equipment installation, and transportation height restrictions (e.g., bridges, tunnels). Some models feature a slight roof slope (approximately 5°-10°) to facilitate drainage and prevent water accumulation and leakage.

II. Internal Functional Area Dimensions and Layout

1. Basic Toilet Area Dimensions: Net width ≥0.85 meters (ideal 0.9-1.0 meters), net depth 1.2-1.5 meters, door width ≥0.6 meters, ensuring space for users to turn around and open/close the door.
2. Accessible Toilet Stall Dimensions: Internal net width ≥1.5 meters, net depth ≥1.8 meters; if using an inward-opening swing door, a wheelchair turning space with a diameter ≥1.5 meters must be provided inside the stall after opening, in compliance with the Accessibility Design Code (GB 50763-2012).

III. Other Model Specifications

1. Single-Unit Mobile Restroom: Length 1.2-1.5 meters, width 1.0-1.2 meters, height 2.2-2.5 meters, suitable for temporary scenarios such as construction sites and small events.
2. Double-Unit Mobile Restroom: Length 2.4-3.0 meters, width 1.2-1.5 meters, height 2.2-2.5 meters, equipped with separate toilet areas and a management room, suitable for large events and tourist attractions.
3. Multi-Functional Mobile Restroom: Length 3.0-4.5 meters, width 2.0-2.5 meters, height 2.5-3.0 meters, integrating toilet, handwashing, and management functions, suitable for high-end events or long-term fixed installations.

IV. Design Considerations

1. Ergonomics: Toilet stall width ≥0.9 meters, handwashing basin height 0.8-0.9 meters, mirror lower edge 1.0-1.2 meters from the ground, accommodating users of different heights.
2. Material Selection: Prioritize lightweight, high-strength composite materials (e.g., fiberglass-reinforced plastic) to reduce weight (typically ≤300 kg/㎡) for easier transportation while ensuring structural stability.
3. Waterproofing and Moisture Resistance: Design a drainage slope (≥2%) at the base, use waterproof coatings or PVC panels on walls, and lay anti-slip floor tiles to prevent water accumulation and leakage.

V. Industry Standards

Compliance with the Urban Public Toilet Design Standard (CJJ 14-2016) is required for parameters such as stall spacing, ventilation volume, and lighting coefficients; some regions (e.g., Beijing, Shanghai) impose additional requirements on mobile restroom dimensions and environmental performance (e.g., sewage storage capacity, deodorization systems), necessitating adherence to local regulations.