Construction technology of light steel keel partition wall: 1 Scope of application: This internal construction technology and testing standard are applicable to all light steel keel gypsum board partition projects under construction. 2. Construction preparation 2. 1 material 2. 1. 1 material such as keel, connector, wallboard, etc. The partition wall shall meet the design requirements, and shall have the ex-factory quality certificate. 2. 1.2 qualified products shall be used for putty, sealant tape, perforated paper tape and glass fiber sealant tape. 2.2 Main machines and tools: riveter, electric self-tapping drill, toothless saw or electric scissors, hand electric drill, mountain flower drill, quick-loading pliers, board saw, putty knife, iron trowel, wrench, tape measure, internal angle trowel, etc. 2.3 Operating Conditions 2.3. 1 The main structure is completed and passed the acceptance. 2.3.2 The rough decoration of indoor floors, walls and ceilings has been completed. 2.3.3 The pipeline has been installed and the water pipe has been pressure tested. 2.3.4 All materials specified in the construction drawing have entered the site and passed the acceptance. 3. Operation technology Construction sequence of light steel keel partition wall: positioning and setting out of partition wall → installing light steel keel skeleton → nailing decorative plate → caulking. 3. 1 Positioning and setting out of partition wall: according to the architectural design drawings, the center line and sideline of partition wall are popped up on the indoor floor, and the wall surface and floor bottom surface of two main structures are measured, and the opening lines of doors and windows are popped up at the same time. 3.2 Install horizontal keel (lower sill) along the ground. Fix with nails, or drill holes first and connect and fix with expansion bolts. When installing, it should be installed according to the center line and sideline, and both ends should be pushed to the surface of structural wall (column), and the final fixed point should not exceed100 mm; From the structural elevation; The spacing between nails or expansion bolts should not be greater than 800 mm, and the levelness and straightness of the keel should be guaranteed during installation. 3.3 Install the transverse keel along the top (upper sill). Installation along the top keel is the same as installation along the earthworm. 3.4 Install vertical keel along the wall (column). The vertical keel of partition frame is fixedly connected with the wall of building structure, which is the same as the installation of keel along the top and ground. 3.5 Install the vertical keel. 3.5. 1 According to the threading holes on the C-shaped vertical keel, first determine the direction of the upper and lower ends of the keel, and try to align the threading holes. The length and size of vertical keel shall be subject to the measured size on site. The premise is to ensure that the vertical keel can slide in the slot along the ground and the top keel. 3.5.2 The vertical keel spacing of light steel wall shall be determined according to the actual width of the cover panel and the wall structure design. 3.5.3 After the vertical keel is installed in place, it should be kept vertical. Doors and windows openings should be strengthened and fixed with double rows of vertical keels. When the design requires rigid connection, the vertical keel and the top keel along the ground should be connected by self-tapping screws or axial rivets. 3.6 installation through keel and cross brace. 3.6. 1 When the partition wall adopts a series of through-hole keels, the vertical keels shall be installed with through-hole keels, and pass through the through-hole of each vertical keel in the horizontal direction. The opening surface of the vertical keel is stabilized with the support card, and the opening is locked here. For the vertical keel without supporting clip series, the stability of the vertical keel can be achieved by using angle braces on the non-opening surface of the vertical keel and connecting the angle braces with the vertical keel with axial rivets or self-tapping screws to support the through keel. 3.6.2 The connection between the cross brace keel and the vertical keel mainly adopts angle brace, which is fixed on the back of the vertical keel with axial rivets or self-tapping screws, and can also be connected with Cato at the opening surface of the vertical keel. 3.6.3 The cross brace keel should be added at an important part of the partition skeleton or at the transverse joint between the cover plate and the series products of non-penetrating keel. 3.7 skeleton installation at nodes such as doors and windows. For the special parts of the partition skeleton, the additional keel or buckle box can be used to strengthen the keel, and it can be installed and fixed according to the design drawings. Decorative wooden door frames are usually fixed on the vertical keel of the hole with self-tapping screws, as is the connection between the cross beam of the door frame and the horizontal keel. 3.8 nail laying of gypsum board. 3.8. 1 plates are generally laid vertically, and arc partition walls can be laid horizontally. The bonding of gypsum board should be carried out from the center of the board to the periphery of the board in sequence. The nail spacing of self-tapping screws in the middle should not be greater than 300mm, and the nail spacing of self-tapping screws around the plate should not be greater than 200 mm. The distance between the screw and the edge of the plate should be10-15mm. The head of the tapping screw is slightly embedded in the board surface, but the covering paper on the board surface shall not be damaged. 3.8.2 There should be a 3mm gap between the gypsum board at the end of the partition wall and the connected wall (column), and the sealing paste should be injected first, and then spread and compacted. 3.8.3 When installing the firewall gypsum board, the gypsum board shall not be fixed on the keel along the ground and at the top, and the transverse keel shall be set for fixation. 3.9 Joint filling: Remove sundries in the joint and fill in putty. When the putty is initially set (about 30-40min), scrape a thin layer of putty with a thickness of 1mm, then stick a perforated paper tape and leave it for a period of time. After the water evaporates, scrape a layer of putty on the paper tape, and hold down the paper tape while leveling the joint plate. 4. Quality standard 4. 1 Main control items 4. 1. 1 The variety, specification, performance and moisture content of wood used for skeleton partition wall should meet the design requirements. For projects with special requirements such as sound insulation, heat insulation, flame retardant and moisture prevention, materials should have corresponding performance grade test reports. Inspection method: observation; Check the product certificate, entry acceptance record, performance test report and reinspection report. 4. 1.2 The frame keel for installing the skeleton partition wall project must be firmly connected with the matrix structure, and should be flat, vertical and in the right position. Inspection method: manual inspection; Ruler inspection; Check the acceptance records of concealed works. 4. 1.3 The keel spacing and structural connection mode in the installation skeleton partition wall shall meet the design requirements. The installation of equipment and pipelines in the framework, the reinforcing keels of doors and windows should be installed firmly and correctly, and the setting of filling materials should meet the design requirements. Inspection method: check the acceptance records of concealed works. 4. 1.4 The wallboard of skeleton partition wall shall be installed firmly, without delamination, warping, cracking and defects. Inspection method: observation; Manual inspection. 4. 1.5 The joint method of wallboard joint material shall meet the design requirements. Inspection method: observation. 4.2 General Project 4.2. 1 The surface of skeleton partition wall shall be smooth, uniform in color, clean and crack-free, and the joints shall be straight. Inspection method: observation; Touch check. 4.2.2 Holes, grooves and boxes on the skeleton partition wall shall be located correctly, with consistent cutting and neat edges. Inspection method: observation. 4.2.3 The filling materials in the skeleton partition wall shall be dry, and the filling shall be dense, uniform and free from falling off. Inspection method: knock inspection; Check the acceptance records of concealed works. 4.2.4 The allowable deviation and inspection method of skeleton partition wall installation shall comply with the provisions in the table below. Allowable deviation and inspection method of skeleton partition wall installation (mm) Gypsum board-based panel and cement fiberboard inspection method 1 verticality of facade 34 Check 2 surface flatness with 2m ruler 33 Check 3 Yin and Yang angle founder 33 Check 4 seam flatness with a square ruler -3 pull 5m line, if it is less than 5m, check 5 layering flatness -3 pull 5m line with a steel ruler. When the conductor length is less than 5m, check the height difference of six joints with steel ruler 1 1. Check with steel rule and feeler gauge 5. Finished product protection 5. 1 During the construction of light steel skeleton partition wall, all disciplines should cooperate closely, and the reserved embedded position is correct, good and leak-free. During the construction of electrical pipes and equipment in the wall, the keel shall not be misplaced or damaged. 5.2 The transportation, storage and use of light steel keel and gypsum board shall be strictly managed to ensure no deformation, moisture, pollution or damage. 5.3 After construction, the partition wall shall be protected to avoid collision, and the wall shall be kept free from damage and pollution. 5.4 When installing water and electricity pipelines and equipment, the fixed parts are not allowed to be directly located on the keel, and should be reinforced according to the design requirements. 6. Quality, environment and occupational health and safety issues that should be paid attention to 6. 1 Quality issues that should be paid attention to 6. 1 The through keel (cross brace) must be kept at the same level as the middle hole of the vertical keel, and firmly clamped, and must not be loosened, so that the vertical keel can be firmly supported and the whole partition skeleton has sufficient rigidity and strength. 6. 1.2 The seam of the cover panel and the vertical seam of the doorway are staggered by half the size of the board to avoid cracks in the upper corner of the doorway. 6. 1.3 gypsum boards on both sides should be staggered, and gypsum boards and keel should be fixed with crosshead tapping screws. The screw length of a layer of gypsum board is 25mm, and that of two layers of gypsum board is 35mm.
6. 1.4 Glass fiber tape with a width of 50mm should be pasted at the joint with the wall and roof, and then layered with putty to avoid cracks. 6.2 Environmental problems that should be paid attention to 6.2. 1 Keels and gypsum boards should be closed when cutting, and they should be operated during the day as far as possible to reduce noise and dust pollution. 6.2.2 Clean up the site after work, remove garbage and fashion bags, and concentrate on consumption. 6.2.3 The materials shall conform to the current national standard "Code for Indoor Environmental Pollution Control of Civil Building Engineering" GB 50325. 6.3 Occupational health and safety issues that should be paid attention to 6.3. 1 Mechanical and electrical equipment should be installed by certified electricians. 6.3.2 Safety helmet should be worn when entering the site, and smoking is not allowed on the job site. 6.3.3 Scaffolds or high stools erected must be inspected before they can be used. 6.3.4 When going off work, pay attention to cut off the power supply, and the electrical switch should be boxed and locked. 7. Quality Record 7. 1 Factory Certificate and Performance Test Report of Light Steel Keels and Accessories. 7.2 gypsum board factory certificate, performance test report. 7.3 Hidden inspection records of light steel skeleton installation. 7.4 Quality acceptance record of inspection lot. 7.5 subentry project quality acceptance record.