Design Drawings for Eaves of Prefabricated Houses
No specific information on 'design drawings for eaves of prefabricated houses' has been found, but key points for eaves design and construction can be provided for reference:
Size Design The width of the eaves should balance functionality and safety. It is recommended that the basic width be 60 centimeters, which can effectively block rainwater while avoiding excessive width that may affect ground-floor lighting or structural stability. If the house has a high floor height (e.g., over 3 meters) or experiences heavy local rainfall, the width can be appropriately increased to 80 centimeters; when the eaves width exceeds 1.2 meters, cantilever beams or supports must be installed to distribute the load and prevent structural deformation. The edge of the eaves can be designed as a drip edge or eagle-beak shape to reduce the risk of rainwater backflow.
Shape and Drainage Design The recommended shape is a 'triple-layer' design, where three layers of stepped casting create a stepped shadow line, enhancing the three-dimensional effect and guiding rainwater to flow down layer by layer. For systematic drainage, a gutter design can be incorporated: it is recommended that the gutter width be between 30 and 60 centimeters, with a 2% drainage slope at the bottom to ensure rapid rainwater drainage. The connection between the gutter and the eaves should be rounded to prevent water accumulation and leakage.
Reinforcement Bar Configuration and Structural Reinforcement The main reinforcement bars for the eaves should have a diameter of no less than 8 millimeters, and the length anchored into the main structure should be at least 30 times the diameter of the reinforcement bars (e.g., for an 8-millimeter reinforcement bar, the anchored length should be at least 24 centimeters). Radiating distribution bars (inserted at a 15-degree angle with a spacing of less than 20 centimeters) should be added at the root of the eaves to enhance crack resistance. The formwork support system should be independently erected to avoid sharing supports with the main structure; the concrete strength must reach 100% of the design value before formwork removal to prevent cracking due to premature removal.
Apron and Foundation Protection The width of the apron slope must be greater than the overhang length of the eaves, with a recommendation of at least 20 centimeters more, and maintain a 5% outward slope to ensure that rainwater is directed away from the house foundation and prevent ground moisture. An expansion joint should be reserved at the connection between the apron and the eaves to prevent cracking due to temperature changes.
Waterproofing Treatment The gutter should be integrally cast with the eaves to form a 'U-shaped trough', lined with waterproofing membrane (such as SBS modified bitumen membrane), and turned up 10 centimeters to the root of the eaves to form a continuous waterproof layer. The joints should be sealed with two layers of adhesive: the bottom layer should be filled with structural adhesive, and the top layer should be covered with flexible sealant to ensure tightness. The surface of the eaves can be coated with waterproofing paint (such as polyurethane waterproofing paint) to further enhance waterproofing performance.
Tip: Specific drawings need to be customized according to the type of house, design requirements, and geographical location. It is recommended to contact a professional architect or construction team to conduct detailed design based on the actual site conditions to ensure construction safety and functional integrity.
