Preparation of Section Drawings for Mobile Toilets

The preparation of section drawings for mobile toilets requires precise representation by integrating the overall structure with detailed construction elements, referencing relevant design drawings and material process requirements. Here are the specific drawing points:

I. Reference Drawing Types and Structural Foundations
Before drawing, it is necessary to collect reference materials such as architectural design drawings for movable public toilets, sectional views of mobile public toilets, and design drawings for eco-friendly mobile restrooms. These drawings typically include overall layouts, height proportions, and key structural nodes, serving as the foundational framework for the sectional drawings. For example, the sectional drawings should clearly indicate the height of the toilet compartments, the slope of the roof, and the relative positions of the floor and roof. Referring to the dimensional annotations in these drawings ensures accurate proportions.

II. Sectional Details of the Floor Structure
The floor of the toilet compartment should display materials and construction in layers:

1. Joist Layer: Use national standard 40mm×40mm square tubes welded into a grid-like joist structure. The spacing is determined based on the floor load calculations, typically ranging from 300-500mm.
2. Base Plate: Riveting a 10mm-thick bamboo plywood onto the joists serves as the installation base for non-slip marble. The spacing of the rivets (e.g., 200mm×200mm) and the fixing method should be annotated.
3. Surface Layer: Install non-slip marble, generally with a thickness of 15-20mm. The bonding method between the stone and the base plate (e.g., using specialized structural adhesive) and the details of edge finishing should be indicated in the sectional drawings.

III. Key Points of the Roof Structure Section
The roof adopts a design combining steel frameworks with造型 (ornamental) structures:

1. Main Framework: Composed of 40mm×40mm thick-walled square tubes forming the main load-bearing structure. The spacing is determined based on the span (e.g., 600-800mm), with annotations for the square tube specifications and welding methods (e.g., full welding).
2. Secondary Framework: 25mm×25mm square tubes are cross-welded onto the main framework to form the supporting structure for the roof's ornamental design. The cross-angle (e.g., 45°) and connection node details should be annotated.
3. Edge Treatment: The bottom ends of the roof's ornamental structural edges require seamless treatment, connected to the building structure via welding or bolts. The sectional drawings should provide enlarged views of the connection areas, annotating the sealing materials (e.g., silicone weather-resistant sealant) and waterproofing methods.

IV. Annotation of Other Key Structures

1. Connection Between Walls and Floor: The bottom of the toilet compartment walls should be welded or bolted to the floor joists. The sectional drawings should annotate the specifications of the connecting components (e.g., M8 bolts) and rust-proof treatments (e.g., galvanizing).
2. Door and Window Openings: If the sectional drawings include door and window positions, the opening dimensions, opening directions, and relative positions to the structural layers should be annotated.
3. Pipeline Embedding: Based on functional requirements, the sectional drawings can annotate the embedded positions of water supply and drainage pipelines, electrical wiring, and protective measures (e.g., casing protection).