What are the acceptance criteria for building construction?

Quality acceptance standard and description of building construction and residential engineering 1. Check the entrance door 1. Inspection standard (1) The door surface shall be clean and free from scratches and bumps; (2) The cutting angle and flat-fell seam of the door should be tight and smooth; (3) The gap between the door and the wall should be full; (4) allowable deviation of door fabrication: allowable deviation of door frame warping is 3mm, allowable deviation of door leaf warping is 2mm, allowable deviation of door leaf surface flatness is 2mm, allowable deviation of diagonal length of door frame and door leaf is 3mm(5) limit value and allowable deviation of door installation joint: width of door leaf butt joint and vertical joint between door leaf and door frame is1.5 ~ 2.5mm; (6) The width of the gap between the entrance door of the blank house and the ground should not be less than 87.5px2 The owner's doubts and explanations: The owner will generally check the entrance door in the following aspects: (1) Door frame inspection: whether the door frame installation is firm and flat, whether the connection between the door frame and the wall is sealed, and whether there are abnormal burrs, cracks and damage on the door frame surface; (2) Door leaf inspection: whether the door leaf is deformed or cracked; Whether the appearance of the topcoat is intact and the surface is smooth; Whether there are obvious scratches and bumps, and whether to consider reserving ground decoration from the ground; (3) Door lock inspection: whether the door lock is firmly installed, whether the key is inserted and pulled out smoothly, whether the lock core rotates freely, whether the lock tongue extends and retracts smoothly in all directions, and whether the lock hole position is normal; (4) Open the door for inspection: whether the door is open and closed smoothly, whether there is abnormal resistance and wear, and whether there is shaking behind the door lock; (5) Door handle inspection: whether the door handle is firmly installed, whether there is abnormal resistance during rotation, and whether there is defect or deformation on the surface; (6) Seal inspection: whether the door leaf joint is within 2.5_. Note: General owners pay more attention to the appearance quality of doors, such as slight scratches, bumps, serious panel cracks and deep scratches, which may cause damage to doors during construction. Minor damage can be repaired by on-site maintenance and touch-up paint, and serious damage can be returned to the factory for maintenance. When the gap width between the entrance door and the ground does not meet the requirements (less than 87.5px), it may be required to return to the factory for sawing. (Note: Generally, the determination to return to the factory for maintenance and sawing is to persuade the property site as much as possible. Generally, it is not agreed by the owner casually, and the property engineering department can judge and decide. The problem of door lock generally occurs during the decoration period and the owner's occupancy period. If it is found that the key is universal and the lock cannot be opened, it can be replaced if there is a quality problem on site. Second, aluminum alloy doors and windows inspection 1. Quality inspection standard for aluminum alloy doors and windows (1): the surface should be clean, flat and smooth, with the same color and no rust. The bedding face should be free of scratches and bumps; (2) Allowable deviation of aluminum alloy doors and windows installation: the allowable deviation of the verticality of the front and side of the door and window frame is 2.5mm, the allowable deviation of the levelness of the door and window cross frame is 2mm, and the allowable deviation of the vertical deviation of the door and window from the center is 5 mm. (3) The gap between the aluminum alloy door and window frame and the wall should be fully embedded and sealed with sealant. The surface of sealant should be smooth, straight and crack-free; (4) The rubber sealing strip of aluminum alloy door sash shall be installed in good condition, and shall not come off the groove; Set the drainage hole should be unobstructed; (5) The switch stress of aluminum alloy doors and windows should not be greater than100n; (6) Installation quality of aluminum alloy door and window glass: the glass surface should be clean and free of putty, sealant, paint and other stains. The inner and outer surfaces of insulating glass should be clean, and there should be no dust and water vapor in the glass hollow layer. 2. Owner's problems and explanations: The owner will generally check the following aspects of aluminum alloy: (1) Window frame inspection: the window frame is installed firmly and correctly; Whether the window frame has scratches, bumps, deformation, etc. (2) Appearance inspection: The surface coating should be uniform in color, smooth to the touch, and free from scratches, bumps and deformation. (3) Inspection of hardware and openings: It is required that the switch should be free and stable, push and pull freely, the track parts should be installed firmly, and there is no air leakage after closing the window. (4) Sealing inspection: whether the sealing strips of sash and window frame, sash and glass are in place and tight, and whether there are any problems such as damage and discontinuity; Whether the sealing strip between the window frame and the wall is complete, whether there are problems such as falling off, damage and cracks, and whether there is leakage. (5) Glass inspection: the installation is firm and complete, without cracks and obvious scratches. Description: The owner is more concerned about the quality of door and window glass, and can give a reasonable explanation according to the following glass inspection standards: (1) the surface quality inspection standard of glass per square meter; The damage of aluminum alloy window frame profile needs to be determined on site. If there are small scratches and bumps (without affecting the use function), you can repair the painting on site. If there is serious deformation that affects the use function or cannot be repaired, it can be replaced. In addition, the owner is more concerned about the leakage of aluminum windows, and found that the leaking windows must be rectified. Three. Inspection of balcony railings and window guardrails 1. Quality inspection standard of finished guardrail (1): the guardrail surface should be smooth, without embroidery, uniform in color, without cracks, warpage and damage, and the joints should be tight; (2) Allowable deviation of guardrail installation: the allowable deviation of guardrail verticality is 3mm, and the allowable deviation of guardrail spacing is 3 mm. The guardrail installation must be firm and correct; (3) The clear height of balcony railings in low-rise and multi-storey residential buildings should not be less than 1.05m, the clear height of balcony railings in middle-high and high-rise residential buildings should not be less than 1. 10m, and the spacing between railings should not be greater than 0.11m; 2. The doubts and explanations of the owners Generally, the owners pay more attention to the surface quality and installation of the guardrail, and most of the problems reflected are the rust and improper installation of the guardrail. Such problems can be corrected. In order to improve work efficiency, it is suggested that the construction unit can provide some paint for the property, and the property maintenance personnel can simply touch up the paint. In case of difficulties in rectification, you can promptly notify the real estate engineering department to arrange for handling. IV. Ground inspection 1. Inspection standard (1) The ground is firmly combined with the next floor, and there can be no empty drum; (Considering the actual technical level of China's construction enterprises, when the empty drum area is not more than 10000px2, there are no cracks, and each natural room or standard room has no more than two places, it is not considered as a construction quality defect). (2) The ground should be dense, free of sand, honeycomb, cracks and other quality defects; (3) The allowable deviation of the ground: the allowable deviation of the surface flatness is 5 mm. What is the allowable deviation of the elevation? mm； The allowable deviation of thickness shall not be greater than110 of the design thickness; (4) The riser, casing and floor drain of ground engineering with waterproof requirements are strictly prohibited from leaking, with correct slope direction and no water accumulation; 2. The owner doubts that the owner will generally check the following aspects of the ground: (1) Ground flatness inspection: the allowable deviation within 2 meters of the national standard is not more than 5mm(2) Whether there are quality defects such as hollowing, cracking, peeling, pockmarked surface and sanding on the ground; (3) Whether there is backflow and water accumulation on the ground; (4) Whether the ground plumbing embedded pipeline is marked; (5) Whether the ground is reserved for decoration; 3. Clear doubts: When the owner reports that the ground is empty, he can give a reasonable explanation according to Article (1) of the above inspection standard, and rectify those that do not meet the standard; For the owner to check the ground flatness, reasonable persuasion and explanation can be made with the owner according to the actual situation on site. If some injustice can be digested and solved in the process of ground decoration, try to persuade the owners to digest it in the decoration project; When the owner is skeptical about the strength of the ground, he can tell the owner that the materials used are mixed in strict accordance with the design requirements to ensure the strength; If a large area of sand is found on the ground, it can be repaired with 107 glue mud. V inspection of smallpox 1. Inspection standard (1) The plaster layer of smallpox must be firmly bonded with the base, and the plaster layer should be free of delamination and hollowing, and the surface layer should be free of ash explosion and cracks; (2) Allowable deviation of ceiling plastering: the ceiling plastering should be smooth, the angle of yin and yang should be square, and the allowable deviation is 4mm2. The owner wonders that the owner will generally check the smallpox from the following aspects: (1) Whether the floor height meets the requirements of the contract, publicity or building book; (2) Whether smallpox has quality defects such as cracks and hollowing; (3) Check the flatness of the ceiling: whether the ceiling plaster is smooth and whether the angle of Yin and Yang is square; (4) Is there a watermark on smallpox? Explain the height of the house: the height of the house refers to the distance from the lower floor or the upper floor, that is, the height of the house. The clear height of a building refers to the distance between the lower floor or the upper floor and the lower floor of the upper floor. The relationship between clear height and floor height can be expressed by formula: clear height = floor height-floor thickness. The indoor clear height of a blank house at the time of delivery refers to the height minus the thickness of the floor structural plate, and then minus the plastering thickness of the ceiling and the leveling layer thickness of the ground. The allowable deviation produced in the construction process should be properly considered in the actual measurement. (What is the allowable deviation of the height of cast-in-place concrete structure? 0mm, ceiling plaster thickness allowable deviation is? Mm, what is the allowable deviation of the thickness of the ground leveling layer? Mm, so what is the allowable deviation of indoor clear height? 0 mm). VI. Wall inspection 1. Inspection standard (1) The plastering surface of the wall shall be smooth, clean and smooth; (2) The plastering layer on the wall must be firmly bonded with the grassroots, and the plastering layer shall be free from delamination and hollowing, and the surface layer shall be free from ash explosion and cracks; External walls shall not have water seepage; (3) drip line (trough) should be made for the parts with drainage requirements, drip line (trough) should be neat and straight, and drip line should be high inside and low outside; (4) Allowable deviation of wall plastering: the allowable deviation of verticality of facade is 4mm, the allowable deviation of surface flatness is 4mm, and the angle of yin and yang should be square, and the allowable deviation is 4 mm; 2. The owner's doubts and doubts. The general owners pay more attention to the quality problems of wall surface quality, such as plastering and wall cracks. In the actual inspection, the allowable range of wall hollowing is: the single wall is less than 5 square meters, hollowing is allowed at 1, and the hollowing area is not more than125px2; The single-sided wall is more than 5 square meters, and at most two hollows are allowed, and each hollowed-out area is not more than125px2; The causes of wall cracks are mainly influenced by temperature and materials. Due to the different expansion coefficients of materials and the influence of temperature, cracks will appear in walls made of different materials. When the owner is skeptical about the strength of wall plastering, he can tell the owner that the materials used are mixed in strict accordance with the design requirements to ensure the strength. Wall cracks and floor cracks are the focus of attention when the owner repossesses the building and must be paid attention to. The main points of general crack inspection are as follows: (1) Check whether there are cracks on the external wall of the house (there are hidden dangers of water leakage). (2) Whether there are cracks in the load-bearing wall, whether the cracks run through the whole wall and through the back, and whether there are oblique cracks (with structural safety hazards). (3) Whether there are penetrating cracks in the load-bearing wall, and whether there are directional and regular cracks in the same position of the walls of different floors (there are structural safety hazards). (4) Check the floor (floor and roof) for through cracks (cracks parallel to the beam). According to Article 8. 1. 1 of Code for Acceptance of Construction Quality of Concrete Structure Engineering, the crack width (0.3mm) is a general defect and does not affect the bearing capacity of cast-in-place slab. (5) Check the floor (ground, roof) for stress cracks, which usually appear on the bearing surface or at the bottom of the middle plate. This kind of crack is generally 45? Tilt to the corner. Cracks, cracks perpendicular to the beam, etc. Such cracks are often wrong, and the shape is wide outside and narrow inside. It should be said that this kind of crack often affects the safety and durability of the structure and needs to be paid attention to. (6) Whether there are through cracks in cantilever structural plates such as balconies and awnings (there are structural safety hazards). Note: If the cracks in the wall and floor found by the owner during the inspection are suspected to be structural cracks, the property staff should not directly disclose or agree with the owner's point of view, which is beneficial to the real estate engineering department to explain and negotiate. Seven. Waterproof inspection 1. Inspection standard (1): The surface of waterproof layer should be smooth and free from defects such as foaming and wrinkling, and the rigid waterproof layer should be free from defects such as brittle crack and sand. The drainage slope of waterproof layer meets the design requirements, and there is no obvious water accumulation; (2) The detailed structure meets the specified requirements, with tight seal and no leakage. 2. The waterproof quality of the house that the owner dispels doubts is the quality problem that the owner focuses on. Waterproof inspection mainly includes the waterproof inspection of bathroom, balcony, kitchen, roof, external wall, external wall doors and windows, and air conditioning hole. Among them, the owners of bathrooms, balconies, kitchens and roofs will require a 24-hour closed water test for inspection when they take over the building; Waterproofing of exterior walls, exterior walls, doors and windows, and air conditioning ports can generally be tested after rainy days. If there is any leakage during the inspection, it must be rectified and tested again until there is no leakage. Eight, water supply and drainage inspection blank room has almost no water supply and drainage facilities except reserved pipes, and no sanitary ware is installed. The owner focuses on the following contents: (1) Inspection of existing valves and faucets: whether the position is reasonable, whether the opening and closing are normal, whether the waterway is smooth, and there is no damage, corrosion, failure of sliding buttons, dripping and other phenomena; (2) The pipeline shall be fixed firmly, installed straight and tidy, the pipeline shall be undamaged, and the joint shall be in good condition; (3) Whether water plugs, pipes, etc. are reserved. Considering the size of the decoration surface, can you open the water plug? (4) Water meter inspection: whether the water meter installation conforms to the specifications, whether the water meter joint is tight and intact, and whether there is idling phenomenon; (5) Inspection of drainage pipeline: the drainage pipeline has no right angle or dead angle; The joint is intact, the interface has no leakage, the pipeline is unblocked, the pipeline is firmly fixed, the installation is neat, and there is no damage; Whether the extension pipeline upstairs is too long or too low affects the decoration; (6) Detection of drain and floor drain: whether there is a floor drain, whether the floor drain position is reasonable, whether the drain and floor drain are complete and whether the seal is tight; (7) The drain should be blocked to prevent garbage from entering the drainage pipeline and causing pipeline blockage. Nine. Electrical inspection For the electrical and equipment owners of rough houses, the following contents should be mainly inspected: (1) Inspection of household distribution box: the installation verticality of distribution box meets the requirements of national standards; The box and decorative board are clean inside and outside, without scratches and color difference; The door can be opened flexibly; All switches and leakage protectors in the box act correctly and the control range is correct; The wiring in the box is neat and the loop number is complete and correct; Wires and switches are firmly connected; (2) Electric meter inspection: whether the installation of the electric meter meets the specifications and whether the electric meter is idling after closing the main gate; (3) Inspection of switch socket: the surface of switch and socket panel is clean and free from damage; The switch control range is correct; The switch cuts off the phase line, and the phase, zero and ground connections of single-phase two-hole and single-phase three hole socket are correct; Cover plates of concealed switches and sockets shall be installed firmly, close to the wall and seamless around; The wire connection meets the requirements of national specifications; (4) Lighting inspection: lamps and lanterns are installed firmly and correctly; (5) Other weak current systems: the acceptance of intercom access control, security and audio system should follow the corresponding national standards.