Design Specification for Cement Prefabricated Houses
The design specification for cement prefabricated houses covers multiple aspects including building materials, structural design, design principles, construction techniques, and acceptance criteria. The specific content is as follows:
Building Material Standards: Cement must comply with the requirements of GB 175-2007 'General Portland Cement' to ensure that its strength, soundness, and other properties meet standards. Reinforcing steel bars should meet the provisions of GB/T 1499.2-2018 'Steel for the Reinforcement of Concrete - Part 2: Hot Rolled Ribbed Bars' to guarantee their mechanical and technological properties. Aggregates must adhere to the requirements of GB/T 14684-2011 'Sand for Construction' and GB/T 14685-2011 'Pebble and Crushed Stone for Construction', controlling indicators such as the fineness modulus and silt content of sand, as well as the particle size distribution and crushing value of crushed stone, to ensure the quality of concrete.
Structural Design Standards: Adhere to GB 50010-2010 'Code for Design of Concrete Structures' and GB 50009-2012 'Load Code for the Design of Building Structures', clarifying requirements for the load-bearing capacity, seismic performance, and durability of prefabricated components. The structural systems of prefabricated rural houses are diverse, including prefabricated concrete shear wall systems, EPS module cast-in-place concrete systems, and light steel frame systems, among others. Each system has detailed design and construction specifications to ensure structural safety and reliability.
Design Principles: The construction of prefabricated rural houses should be modern in function, safe in structure, economical in cost, environmentally friendly, and harmonious in style, integrating local climate, topography, cultural customs, and architectural characteristics to meet the functional needs of modern rural residents. Respect the housing needs of farmers, reflect regional characteristics, and consider age-friendly design, such as providing barrier-free ramps at entrances. The floor plan and facade design should facilitate winter sunshine and summer ventilation, with a north-south orientation. The building form should be simple and regular, with a regular floor plan layout and vertically aligned load-bearing components. Functional spaces include bedrooms, dining areas, storage spaces, courtyard spaces, etc., with a separation of dynamic and static living areas.
Construction Technique Standards: Construction techniques must comply with GB 50666-2011 'Code for Construction of Concrete Structures' and JGJ 1-2014 'Technical Specification for Prefabricated Concrete Structures', covering technical requirements for the production, transportation, hoisting, and connection of prefabricated components. Prefabricated rural houses should preferably be constructed by professional construction teams or trained rural individual builders. A construction organization design and plan should be formulated, integrating design, production, and assembly principles for overall planning and coordinating requirements across various disciplines.
Acceptance Criteria: Acceptance should be carried out in accordance with GB 50204-2015 'Code for Acceptance of Constructional Quality of Concrete Structures', including checks on component dimensional deviations, appearance quality, and strength testing, to ensure that the house quality meets design requirements.
