Mobile Toilet Material Selection Requirements and Standards

The requirements and standards for material selection in mobile toilets need to be comprehensively considered from multiple aspects, including the main structure, wall materials, floor materials, and material properties, as detailed below:

I. Main Structure Materials The main structure of a mobile toilet should be made of materials that meet design specifications, with common materials including steel and wood. Steel should be accompanied by a quality compliance certificate, with no visible rust, cracks, or deformation on its surface to ensure structural stability. Wood should be dried, with its moisture content controlled within a reasonable range, and free from decay or insect infestation to prevent structural damage due to changes in environmental humidity.

II. Wall Materials Wall materials should meet requirements for waterproofing, moisture resistance, and weather resistance. Color-coated steel sheets should have a uniform color, with a coating thickness that meets standards (e.g., polyester coating thickness ≥ 25μm) to avoid scratches or deformation. Fiberglass-reinforced plastic (FRP) should pass strength tests to ensure its impact resistance meets standards, while its corrosion resistance should meet long-term usage needs. If metal sandwich panels (e.g., color-coated steel foam panels) are used, note their relatively poor corrosion resistance and the need for regular maintenance to prevent rusting.

III. Floor Materials Floor materials should combine slip resistance, wear resistance, and ease of cleaning. Anti-slip floor tiles should be hard, with dimensional deviations controlled within allowable limits (e.g., side length error ≤ 1mm), and a surface friction coefficient that meets safety standards. Preservative-treated wooden floors should undergo professional preservative treatment, with their moisture content controlled between 8% and 12% to prevent deformation due to water absorption and swelling. Additionally, floor materials should be compatible with the drainage system to ensure rapid sewage discharge.

IV. Comparison of Common Material Properties

1. Stainless Steel (e.g., 304 Stainless Steel): Highly corrosion-resistant, with a smooth surface that is easy to clean, suitable for high hygiene standard scenarios (e.g., hospitals, scenic spots). However, it has a high cost and is heavy, requiring consideration of transportation and installation costs.
2. Fiberglass-Reinforced Plastic (FRP): Formed as a whole without seams, with excellent waterproofing and moisture resistance, and high cost-effectiveness. However, its impact resistance is relatively weak, and it should be protected from sharp object collisions.
3. Metal Sandwich Panels (Color-Coated Steel Foam Panels): Low cost but poor corrosion resistance, prone to rusting and difficult to clean, suitable for short-term use or dry environments.
4. Aluminum-Zinc Alloy Coated Steel Sheets: Approximately 50mm thick, combining corrosion resistance with lightweight properties, extending service life and reducing transportation difficulties, suitable for scenarios requiring frequent relocation.

Summary: Material selection for mobile toilets should be based on a comprehensive decision-making process considering usage scenarios, budget, and maintenance costs. For example, stainless steel or aluminum-zinc alloy coated steel sheets are preferred for long-term use or high hygiene standard scenarios; FRP or metal sandwich panels can be considered for short-term or low-cost projects, but corrosion prevention maintenance should be strengthened.