【Haichuan Civil Engineering Issues】Take a look at the extremely comprehensive guide to completing project acceptance! ! !

3 Completion Acceptance: Upon receiving the quality assessment report submitted by the supervision unit, the project owner shall promptly organize the completion acceptance of the individual construction units. The project owner must submit the completion acceptance notice, the acceptance plan, a list of the personnel involved in the acceptance process, as well as all relevant project documents to the quality supervision office at least 7 working days before the acceptance is scheduled. Once the relevant department of the quality supervision office verifies that everything meets the requirements, it will sign the completion acceptance notice. Upon receiving the completion acceptance notice, the quality supervision station shall promptly inspect whether the project meets the conditions for completion acceptance, and inform the construction unit whether it is possible to organize the acceptance on schedule. Quality supervision personnel shall supervise the organizational format, procedures adopted by the construction unit for acceptance, as well as the compliance with mandatory standards for project construction. During the supervision of the completion acceptance of a project, if quality supervisors detect any violations of the regulations regarding construction project quality management or if the project quality does not meet the mandatory standards, they shall order the construction unit to make corrections or to organize another completion acceptance after such corrections have been carried out. After the construction unit completes the completion acceptance, the quality supervision station shall submit a project quality supervision report to the competent construction administration department designated for this purpose within 5 working days.

02 The unit project is ready for completion acceptance when 1 all the requirements specified in the construction project design and the contract have been fulfilled. 2 It has complete technical documentation and construction management records. 3 There are certification documents for the main building materials, building components, and equipment used in the project, as well as reports on the sampling tests conducted. The inspection data related to safety and functionality for the sub-projects included in the 4 units (sub-units) of work should be complete; the results of random inspections on the main functional items should comply with the provisions of the relevant professional quality acceptance standards; the visual quality should meet the required standards. All the issues ordered for rectification by the 5 quality supervision stations have been fully resolved. 6 Quality compliance documents signed separately by units such as survey, design, construction, and supervision. 7 Project quality warranty letter. 8 There are approval documents or permits for use issued by departments such as public security, fire protection, and environmental protection.

03 Items for inspection during the completion acceptance of the PART project 01 Roof: From top to bottom, from inside to outside or from outside to inside. (1) Is the roof slope correct? Do the details such as water outlets, membrane joints, and flashings meet the relevant requirements? The slope within a radius of 500 mm around the water outlet should be no less than 5%; ideally, it should be 600–800 mm, with a depth of not less than 50 mm. It should also be coated with waterproof paint or sealing material, with a thickness of not less than 2 mm. (2) Are the roof ladders and access hatches installed in accordance with the design requirements? (3) Is the height of the roof parapet, as well as the design of the cast-in-place concrete expansion joints and building deformation joints, correct? When there are no specific requirements in the design, expansion joints should be provided in exposed concrete structures such as cast-in-place overhangs and canopies, with the spacing between these joints not exceeding 12 meters. (4) Are the roof vent pipes, exhaust pipes, and flue pipes installed in a compliant manner? The ends of the waterproof layer on the pipes should be secured with metal clamps and sealed with sealing material. The height at which flues and ventilation ducts protrude from the flat roof shall be not less than 0.60 m, and shall not be lower than the height of the parapet wall. The waterproof layer of the roof drain should be inserted into the drain cup by at least 50 mm. When it is difficult to dry the roof insulation layer, venting measures should be employed. When a vent pipe is used as there are no specific design requirements, its diameter should generally not exceed 32 mm to prevent local heat bridging in the roof panels. On flat roofs that are frequently occupied, the drainage vent should be 2 meters above the roof surface, and lightning protection devices should be installed. (5) Does the insulation method for the parapet wall meet the regulatory requirements? The moisture content of the insulation layer must meet the specified requirements, and its thickness must be at least as required by the design. (6) Does the construction of the membrane waterproofing protection layer meet the specification requirements? Polymer-modified asphalt waterproofing membranes with a thickness of less than 3 mm must not be installed using the hot-melting method. The long-edge lap width of polymer-modified asphalt waterproofing membranes should not be less than 80 mm. (7) Are the roof ancillary structures in compliance with regulations? Roof truss layout, partial mezzanines, roof structure, energy conservation and insulation, lightning protection and grounding, and so on. (8) Is the lightning protection strip on the parapet wall installed correctly? (9) Are the expansion joints in the roof surface layer or waterproof protective layer of the building in compliance with the specification requirements? (10) There are no relevant documents such as design changes indicating that the roof shape has been changed from a pitched roof to a flat roof structure

2 Top floor (1) Are there any signs of leaks or moisture in the roof? (2) Are there any structural cracks in the walls and ceiling? (3) Do the height of the handrail on the top floor staircase and the spacing between the railings meet the specified requirements? When the length of the horizontal handrail on the side facing the stairwell exceeds 0.50 m, its height should not be less than 1.05 m. Anti-slip measures should be taken for the steps. 3. Between equipment rooms and pipe shafts: (1) Are the fire sealing measures in equipment rooms and pipe shafts in compliance with regulations? (2) Are the walls and floors in the equipment rooms and pipe shafts smooth and clean? (3) Are the pipe supports installed firmly and reliably? (4) Are the right angles square? (5) Does the equipment base meet the design requirements?

4 Intermediate layer: (1) Are the height of the stair handrails and the spacing between them in compliance with requirements? Are the protective measures for low windows in accordance with regulations? When no specific requirements are specified in the design, protective railings at heights of not less than 1.05 m should be installed at open areas such as building balconies, exterior corridors, indoor corridors, interior courtyards, walkable rooftops, and outdoor stairs (within 24 m height). There should be no gaps within 0.10 m above the floor or roof surface beneath the railings. In residences, primary and secondary schools, kindergartens, and other places where children are allowed to be present, the railings must be designed in such a way as to prevent children from climbing up them. When vertical bars are used as railings, the spacing between these bars should not exceed 0.11 meters. When there are no specific requirements in the design, the height of the handrail on indoor stairs, measured from the front edge line of the tread, should not be less than 0.90 m. When the length of the horizontal handrail on the side of the stairwell exceeds 0.50 m, its height shall not be less than 1.05 m. Anti-slip measures should be taken for the steps. When the clear height from the floor or ground to the window sill of exterior residential windows is less than 0.90 m, protective measures shall be taken. The clear width of residential corridors and passages in public areas should not be less than 1.20 m, and the local clear height should not be lower than 2.00 m. The doors of residential stairwells and vestibules shall open in the direction of evacuation. The guardrail glass should be tempered glass or tempered laminated glass with a nominal thickness of not less than 12 mm. The clear height at the landing of a building staircase shall not be less than 2.2 m. (2) Are there any leaks in the bathrooms and rooms that require waterproofing? Bathrooms equipped with a floor radiant heating system must have two separate insulation layers (waterproof layers) as required by the technical specifications, and a waterstop wall must be installed at the entrance to the bathroom. After laying the indoor waterproofing materials, it is necessary to conduct a water retention test. The water storage depth should be 20–30 mm; it is considered acceptable if there is no leakage within 24 hours, and this should be recorded. (3) Check the flatness of the floor surface, its color, and the uniformity of the seams. The surfaces of marble and granite finishes are clean, smooth, free of scratches, with clear patterns and uniform color. The joints are even, the edges are straight, the inlay is proper, and the slabs have no defects such as cracks, chipped corners, or missing edges. Is there any bulging, cracking, or sanding of the overall floor surface? Is the distribution of the stones in the terrazzo floor even, are the dividing strips visible, and is the color consistent? The skirting boards should have a clean surface, be firmly attached, have consistent heights, and an equal thickness when protruding from the wall; they should also match the style of the floor tiles. Additionally, check whether the entry and exit points on the exterior wall of the balcony are aligned properly. The sleeves installed in bathrooms and kitchens should have their tops 50 mm above the finished floor level. (4) Are the modular decorative materials and tile slabs pre-arranged or do they come with a decorative installation design before being fitted, and is the cleanliness of the walls as well as the uniformity of the joints of high quality and precise? (5) Check the levelness and perpendicularity of door and window installation, as well as their inner and outer depths; assess the stability of the installation, whether the sealing quality meets the requirements for waterproofing and aesthetics, and whether there is any contamination. Examine the tightness of the gaps around the doors and windows, and whether the small hardware components are properly installed. Also, assess the quality of the paint both visually and by touch. Additionally, check whether the division of the exterior windows meets the design specifications, and whether the materials used for assembling them are up to standard (6) Has fireproof paint been applied to the surface of the fire door as required? (7) Are the door hinges properly selected and installed? Are plywood and fiberboard doors secured firmly, and are the ventilation holes unobstructed? (8) Check whether the fabrication and installation of the woodwork are meticulous, whether the paint color is uniform, if there are any cracks or hollow areas, and whether the embossing is even (9) Does the arching and installation of the ceiling comply with the regulatory requirements? (10) Are the water barrier on the upper surface of the stair tread and the drip edge at the lower part of the tread in compliance with the regulations?

5 Ground floor: (1) Is the arrangement of the entrance hall or vestibule in compliance with regulations? (2) Does the anti-theft railing on the exterior windows on the first floor meet the requirements? (3) Are the waterproofing methods for the canopies and the downspouts in compliance with regulations? (4) Does the fire seal between the first floor and the basement meet the design requirements? 6 Basement: (1) Is the height of the basement in line with the design requirements? (2) Is the insulation of the ceiling in unheated basements adequate? (3) Are the openings around the pipes in the basement sealed as required? (4) Are anti-theft railings installed on the exterior windows of the basement? The diameter of such railings should be no less than 10 mm, and the spacing between them should not exceed 110 mm. (5) Is there any leakage in the basement ceiling? (6) Does the fire wall in the basement meet the design requirements?

7 Exterior Finishings (1) Check for any cracks, tilting, or deformation in the main structural elements caused by problems with the foundation. Examine whether there is any settlement in the soil around the foundation that could lead to damage to the drainage areas. Also, verify whether the installation and design of expansion joints and seismic joints are appropriate. (2) Inspect the color, joint alignment, and smoothness of the exterior wall decorations. Determine whether the stone was installed using dry hanging methods or wet bonding techniques, and check for any signs of defects such as discoloration, efflorescence, or moisture intrusion. Assess the levelness and perpendicularity of interior and exterior walls, beams, slabs, columns, and decorative elements. Check the smoothness of walls and ceilings, look for any cracks or warping in the ceilings, and ensure that openings are properly shaped and straight. (3) Verify that the building’s energy-saving insulation measures, including those related to the base course, comply with regulations. (4) Ensure that expansion joints are properly installed on outdoor stairs and drainage areas. Also, check for any signs of settlement. Regarding accessibility requirements for residential buildings, the height difference between the threshold at the building entrance and the ground level inside and outside the door should not exceed 15 mm, and a slope should be provided for transition. (5) Is the drip line configuration correct, and does the drainage slope meet the design requirements? Both the width and depth of the drip tray should be no less than 10 mm. (6) Is the installation of exterior windows and the filling of gaps between window frames and walls with sealant done in a proper and adequate manner? According to fire safety requirements, the horizontal distance between the nearest edges of the windows in stairwells and those in suites should not be less than 1.0 m. (7) Are the practices for energy-saving projects in outdoor buildings in compliance with standards? Do the wall surfaces have the required levelness and smoothness? Under proper use and regular maintenance, the service life of external wall insulation systems should be no less than 25 years. When the building height is over 20 m, anchor bolts should be used for additional fixation in areas subject to high negative wind pressure. During the construction of external insulation works and within 24 hours after completion, the temperature of the substrate and the ambient air should not be lower than 5°C. Avoid exposure to sunlight in the summer. Construction is not permitted in strong winds of level 5 or above or during rainy weather. The strict construction regulations for building energy efficiency projects require that the thickness of insulation materials meet the design specifications.

8 Others: (1) Check the quality of installation of water, heating, gas, ventilation, and air conditioning pipes and fixtures; verify the flow direction of the media, as well as the labeling on the pipes. Ensure that the pipes are horizontal and vertical, that the supports are firmly fixed, that the hangers are straight, that the paint color is consistent, that everything is properly attached, that the labels are clear, and that the valves are installed correctly. The welds on the pipes should be sound, and the ventilation openings should fit tightly against the ceiling and walls. The fire sprinklers should be arranged neatly. Is the orientation of the fire hydrant nozzles correct? When the length of a radiator branch pipe exceeds 1.5 meters, pipe clamps should be installed on that branch pipe. In the acceptance of building ventilation duct specifications, both air ducts and air channels are evaluated based on their outer diameter or outer dimension. Before the initial heating of a ground radiant heating system, the curing period for the concrete filler layer shall not be less than 21 days. The sensors of the indoor temperature control device for low-temperature hot water floor radiant heating systems in buildings should be installed on the inner wall, away from direct sunlight and heat-generating equipment, at a height of 1.4 m above the floor. The Technical Code for Ground Radiant Heating stipulates that, in order to prevent excessive variations in the ground temperature distribution, the maximum spacing between heating pipes should not exceed 300 mm. (2) Check that the pipes and connections show no leaks, that the equipment is installed in an orderly manner in the correct positions, that the connections are secure, that the quality is excellent, that there are no safety hazards, that operation is smooth, and that the performance meets the design requirements. The insulation, heat insulation, corrosion protection of the pipes, as well as their thread and flange connections, all meet the technical standard requirements; furthermore, the accessories for PVC pipes are appropriate and comply with the standard specifications. (3) Check the quality of electrical wiring installation and device mounting, for any issues such as unclear connections, mixed usage of wires, or lack of grounding. Also verify whether the lightning protection facilities, distribution boxes, cable trays, and equipotential bonding systems are installed in compliance with relevant standards. (4) Check whether the elevator operates in accordance with the design requirements and can function properly; verify that the company that installed the elevator possesses the necessary qualifications, and that the labor department (or in some cases, the technical supervision bureau) has given approval for it to be put into use. In practical engineering, it is common to find that the leveling of some elevators is not consistent enough. Due to the uneven tracks of the elevator, it generates a lot of noise during operation and feels shaky. During the re-inspection, the civil engineering work in the top elevator shaft cannot be ignored either.

04 PART: Documents for Completion Acceptance 1. Inspection of supervision-related documents: 1) Supervision plan; 2) Detailed implementation rules for supervision; 3) Information on quality issues in the monthly supervision reports; 4) Information on quality issues in the minutes of supervision meetings; 5) Approvals for project commencement/resumption; 6) Orders to suspend project commencement/resumption; 7) Notices regarding non-conforming items; 8) Reports on quality incidents and corresponding handling suggestions; 9) Opinions on the audit of the final project cost; 10) Reports on project delays and related approvals; 11) Reports on contract disputes and breaches, along with handling suggestions; 12) Documents related to contract changes; 13) Summary report on project supervision; 14) Quality assessment report for the pre-completion inspection of the project.

2 Acceptance of construction documents (I) Civil engineering: (1) Documents related to construction technical preparation, records of drawing reviews. (2) Site preparation: documents for setting up the control network along with the corresponding submission forms; documents for engineering positioning surveys along with the corresponding submission forms; documents for measuring the excavation lines for the foundation trench along with the corresponding submission forms. (3) Records of foundation treatment and corresponding submission forms: records of foundation augering and the plan showing the locations where augering was carried out; records of trench inspection and foundation treatment; records of pile construction; records of pile testing. (4) Records of changes to engineering drawings: records of design review meetings; records of design changes; records of project consultations. (5) Quality certification documents for construction materials and precast components, retest reports, and corresponding application forms for their use on site: ① Test results for sand, stone, bricks, cement, steel bars, waterproof materials, insulation materials, anti-corrosion materials, and lightweight aggregates; summary tables of radiation tests for stones and floor tiles; ② Factory certification documents for sand, stone, bricks, cement, steel bars, waterproof materials, insulation materials, anti-corrosion materials, and lightweight aggregates; ③ Test results for sand, stone, bricks, cement, steel bars, waterproof materials, insulation materials, anti-corrosion materials, and lightweight aggregates, as well as retest reports for electrodes and asphalt, and radiation retest reports for stones and floor tiles, along with corresponding application forms for their use on site; ④ Factory certificates of conformity for precast components (steel, concrete), test records, and corresponding application forms for their use on site. (6) Test reports: ① Test report on the dry density of soil (plain soil, lime soil); ② Test report on the compaction of soil (plain soil, lime soil); ③ Test report on the compressive strength of mortar (test blocks); ④ Test report on the compressive strength of concrete (test blocks); ⑤ Test report on the water resistance of concrete; ⑥ Certificate of conformity and retest report for commercial concrete; ⑦ Test report on steel bar joints (welding); ⑧ Summary table of test reports for soil, mortar, concrete, steel bar connections, and concrete water resistance. (7) Inspection records for concealed works and corresponding submission forms: ① Reinforcement work for foundations and main structures; ② Steel structure work; ③ Waterproofing work; ④ Elevation control. (8) Construction records and corresponding inspection forms: ① Records of engineering positioning and surveying checks; ② Settlement observation records; ③ Records of structural lifting; ④ On-site construction prestress records; ⑤ Final engineering survey records; ⑥ New building materials; ⑦ New construction technologies. (9) Documents for evaluating project quality and corresponding submission forms (10) Records of handling project quality incidents (11) Project quality inspection records: ① Records of quality inspection for foundations and main structure; ② Records of quality inspection for curtain wall projects; ③ Records of quality inspection for individual sections (sub-sections) of the project