Mobile Toilet Base Structure

The base structure of mobile toilets typically employs a steel frame design to ensure stability and durability. Specific structural features are as follows:

1. Angle Iron Frame with Intermediate Plywood Base Structure
This structure uses angle steel as the primary load-bearing frame, connected by welding or bolts to form a stable rectangular or square base. Angle steel offers high bending and torsional resistance, effectively distributing upper loads and preventing local stress concentration. The intermediate plywood, usually made of high-density materials (such as multi-layer boards or steel plates), provides a flat installation surface for subsequent floor adhesive or decorative layer fixation. The plywood and angle steel frame can be secured with bolts or rivets to ensure structural integrity. The floor adhesive applied on the surface must possess anti-slip, moisture-proof, and wear-resistant properties, commonly made of PVC or rubber, with a thickness generally ranging from 2-5mm. This not only enhances user safety but also prevents groundwater seepage from corroding the steel structure.

2. Channel Steel or I-Beam Welded Bottom Frame
For large or heavy-duty mobile toilets, the bottom frame is often welded from channel steel or I-beams. Channel steel, with its 'C'-shaped cross-section, offers high bending stiffness, suitable for bearing vertical loads. I-beams, with their 'H'-shaped cross-section, provide superior bending and torsional resistance, ideal for scenarios with large spans or high load requirements. During welding, it is crucial to ensure weld quality, avoiding incomplete welds or cracks, and conducting flaw detection tests if necessary. Columns are typically made of square steel (e.g., 40×40mm or 50×50mm), connected to the bottom frame by welding or bolts to form a three-dimensional support structure, enhancing overall stability. The surface of the square steel must undergo anti-corrosion treatment (such as hot-dip galvanizing or painting) to extend its service life.

3. Structural Optimization and Detail Design
To enhance the applicability of mobile toilets, the base structure should also consider the following details:

• Drainage Design: The bottom frame must reserve a drainage slope (usually ≥2%) and set up drainage outlets or guide channels to ensure rapid sewage discharge, preventing water accumulation from corroding the steel structure.
• Moisture-Proof Treatment: Lay moisture-proof membranes (such as plastic film or asphalt felt) at the contact points between the steel structure and the ground to prevent ground moisture penetration and rusting.
• Adjustable Feet: Some mobile toilets are equipped with adjustable feet at the bottom, allowing height adjustment through threads or hydraulic devices to accommodate different ground flatness requirements.
• Lightweight Design: While ensuring strength, structural self-weight can be reduced by optimizing cross-sectional shapes (such as using hollow square steel) or selecting high-strength steel (such as Q345B), facilitating transportation and installation.