Light steel keel gypsum cover panel partition wall construction
1 scope
The technology standard is applicable to industrial and civil building, light steel keel gypsum cover panel wall installation.
2 construction preparation
2.1 material and main equipments:
2.1.1 light steel keel, currently USES light steel keel partition wall engineering mainly support card series keel and penetration series keel. Light steel keel master pieces along the top edge to the keel, strengthen the keel, vertical (horizontal) to the keel, lateral brace keel. Light steel keel accessories have supported CARDS, cato, Angle, fittings, fixed pieces, protect horn, seam pressure, etc. Light steel keel configuration should meet the design requirements. Keel should have product quality certification. Keel appearance should be smooth, straight edges and corners, transition Angle and crack is not permitted in trimming and burr, wheat flour may have serious pollution, corrosion and mechanical damage.
2.1.2 fastening material: nail, expansion bolts, galvanized self-tapping screws (2 mm thick gypsum board for 25 mm long screw, two layers of 12 mm thick gypsum board with 35 mm long screw), wood screw, etc., should meet the design requirements.
2. L. 3 filler material, glass wool, mineral wool board, rock wool board, etc., choose according to the requirements of design.
2.1.4 gypsum board, gypsum board should have product certification. Specification shall conform to the requirements of design drawings. The general specification is as follows:
Length: according to the project need to be sure;
Width: 1200 mm and 900 mm;
Thickness: 9.5 mm, 12 mm, 15 mm, 18 mm, 25 mm. Commonly used to 12 mm.
2.1.5 seams material: joint putty, glass fiber tape (cloth), 107 glue.
2.1.5.1 WKF seam putty: > 3.0 MPa compressive strength, flexural strength > 1.5 MPa, final set time > 0.5 h.
2.1.5.2 50 mm in alkali glass fiber and glass fiber grid cloth:
> 80 g/m2, 8 orders/in
Breaking strength: 25 mm x 100 mm cloth, warp > 300 n
Zonal > 150 n
8.1.6 main machines: panel saw, electric scissors, electric tapping drill, electric saw, electric hand drill, nail gun, dc arc welding machine, scraper, line fall, on foot, etc.
2.2 operation conditions:
2.2.1 the main structure acceptance, waterproof layer roof have been finished.
2.2.2 indoor pop-up + 50 cm elevation lines.
2.2.3 homework environment temperature should not be lower than 5 ℃.
2.2.4 familiar with drawings, and makes detailed technical clarificaiton to operation team.
2.2.5 according to drawings and material plan, verify partition all the materials, so that it is complete.
2.2.6 the main structure of brick masonry walls, column, should be in partition junction, according to a 1000 mm distance between embedded anticorrosive wood brick.
2.2.7 pillow design requirements partition have land, should be to C20 pillow with the construction of fine stone concrete and strength to achieve more than 10 mpa, can the installation of light steel keel.
2.2.8 first as sample wall, identified after passing another large-scale construction.
3 the construction technology
3.1 process:
Pillow with line, step to do (design requirements) - fixed along the top, along keel -
Fixed frame to install vertical keel, keel installation to install additional keel, door, window frame
To check the keel installation, electrical installation support keel laying GuanAn attached to install the masks panel, equipment
Sound insulation material to cover installation on the other side panel, fill joints and corner protector to quality inspection, processing
3.2 line, step: in the partition wall on both sides of the upper and lower and substrate of place, should according to the width of the keel line. Play line clear, position accurately. According to the requirements of design, the combination of cover panel length, width step, to determine the vertical keel; The location of the cross arm and additional keel.
3.3 as a pillow with: when the design requirements, according to the design requirements for bean pillow with concrete. Pillow for land should die, beans cast concrete shall be compacted.
3.4 fixed along the item, along keel; Along the line location along a fixed, along the keel, nail or expansion bolt are available, and fixed point spacing should be not more than 600 mm, keel to scoop out flat.
3.5 fixed frame keel: along the elastic line position fixed frame keel, keel line should be with the line. End should be fixed, fastening point of the keel spacing should be no greater than lm, should be fixed firmly.
Border, between the keel and matrix seals shall be installed according to design requirements.
3.6 when choosing support card series keel, should first will support card installed on the vertical keel opening, card from 400 ~ 600 mm, distance from opposite sides of the keel is 20 ~ 25 mm.
3.7 installation should be perpendicular to the vertical keel, keel spacing should be in accordance with the requirements of design layout. Design requirements, the spacing can be according to the width, such as width of 900 mm, 900 mm, the distance between 453 mm and 603 mm respectively.
3.8 when choosing flux penetration series keel, below 3 m partition to install a; 3 ~ 5 m partition to install two; Install three more than 5 m.
3.9 cover panel transverse seams, if not on the along the top, along keel, should add lateral brace keel plate seam.
3.10 doors and Windows or special node, with additional keel, installation should meet the design requirements.
3.11 for special structure partition keel installation (such as curved surface, inclined partition, etc.), should comply with the design requirements.
3.12 electrical laying, installation of equipment: wall embedded pipes and attached equipment according to the requirements of drawings. A simultaneous requirements and the installation of the keel, or on the other side as gypsum board before, and local strengthening measures, fixed firmly. Electrical equipment laying pipelines in the wall, should avoid to cut off the horizontal, vertical keel, at the same time avoid set bottom line along the wall.
3.13 keel check correction reinforcement: cover panel before installation, should check degree of solid skeleton, partition door window frames, all kinds of attached equipment, pipeline installation and fixed meets the design requirements. If you have weak place, should be reinforced. Keel vertical deviation should be 3 mm or less, the facade surface uneven should be 2 mm or less.
3.14 installation gypsum cover panel:
3.14.1 plasterboard appropriate vertical laid, long side (i.e., bag sealing side) joint should fall on the vertical keel. Only partition for firewall, gypsum board should be vertical.
Plasterboard used appropriate lateral surface wall laid.
3.1.4.2 keel gypsum board and keel on either side of the side of the inside and outside two layer plasterboard should arrange staggered joints, joint shall not fall on the same root keel.
3.1.4.3 plasterboard used self-tapping screws. Along the drywall screw spacing around should not be greater than 200 mm, the middle section should not be greater than 300 mm screw spacing, screw and plate on the edge of the distance should be 10 to 16 mm.
3.14.4 installing a plasterboard, should from the plate to the plate in the middle of the four fixed edges, nail head slightly into the plate, but shall not damage the paper. Gypsum putty screeding nailhole applications.
3.14.5 plasterboard should use whole board. For docking, close to, but not crush in place.
3.14.6 partition wall around the end of gypsum board and wall or column should leave 3 mm slot. When construction, in the slot first filling sealing paste, then planking, squeeze the sealing paste and the adjacent surface close contact.
3.14.7 install firewall gypsum board, gypsum board shall be fixed on along the top, along keel, should be fixed up cross brace keel.
3.14.8 clapboard bottom as skirting board covered with wood, from the ground cover panel should be 20 ~ 30 mm; Marble, terrazzo, skirting board, the bottom cover panel should be flush with skirting board hooks, seam tightly.
3.14.9 laying within the walls of glass wool. Mineral wool board, rock wool board, such as filling material, plasterboard of face and installation on the other side at the same time, filling materials should be covered with smooth.
3.15 joints and protect horn handle:
3.15.1 gypsum board wall joint practice has three forms, namely, flat seam, concave joint seam and layering. Generally do flat seam is more, according to the following procedures:
3.15.1.1 gypsum board installation, the juncture place should be appropriate seam (usually 3 ~ 6 mm), and must be groove into the groove. Seam aggradation clean, after a 50% concentration of 107 glue solution.
3.15.1.2 with a small spatula sew WKF seams putty embedded plate, plate seam is covered in embedded real, scrape to evenness with mouth. To be bored with child after dry, to check whether there is crack sealing place, if any, to analyze the reason of crack, and caulking.
3.15.1.3 at the joint groove about LMM thick WKF putty scraping, and then paste the glass fiber tape, scrape to evenness compaction.
3.15.1.4 when putty solidifies and while they are still in the wet state, again a WKF putty, glass fiber with embedded in putty, fill leveling and joints.
3.15. L. 5 internal Angle seam processing method with flat seam.
3.15.2 Yang Angle according to the following methods:
3.15.2.1 Yang Angle paste two layers of glass fiber cloth, Angle on both sides have turned the 100 mm, paste method with flat sewing processing, surface scrape to evenness with WKF putty.
Article 3.15 2.2 when the design requirements for metal corner protector, according to the design requirements of position, height, a layer of putty scraping first, then use the galvanized nails fixed metal article kok, scrape to evenness with putty.
3.16 after being joints putty dry, to check whether there is crack plate joint, crack is found, must analyze the reason, take effective measures to overcome, otherwise cannot access panel decoration construction.
4 quality standards
4.1 ensure projects:
4.4.1 light steel keel, gypsum cover panel must have a product certificate, its varieties, type, specification should comply with the design requirements.
Inspection method: inspect the product certificate, and check control drawings.
4.1.2 light steel keel, fastening material should meet the design requirements and construction features. Installation of light steel frame should guarantee the stiffness, shall not be bent out of shape. Skeleton and matrix structure of connection should be strong, no loose phenomenon.
Inspection method: hand push and pull inspection and observation.
4.1.3 wall structure and horizontal laying should comply with the design requirements of gypsum board, the installation must be strong. Gypsum board shall not be affected with damp be affected with damp, warping deformation, lack of edge Angle, delaminating, fracture, thickness should be consistent.
Inspection method: hand push check and observation.
4.2 the basic items:
2 light steel skeleton along the top, along keel should be correct and the relative vertical position. Vertical keel should set a step accurately and integrity, no deformation, with expansion amount according to regulations (usually vertical keel length shorter than net 30 mm), nail spacing should comply with the requirements.
Inspection method: to observe the examination.
4.2.2 panel surface level off, clean, no hammer, spacing, nail nailed a should comply with the design requirements.
Inspection method: to observe the examination.
Holdings cover panel seam form should comply with the design requirements, joint and layering width is consistent, flat seam should be smooth, no cracks.
Inspection method: to observe the examination.
4.3 allowable deviation projects:
Light steel keel gypsum cover panel partition allowable deviation are shown in table 9 to 14.
5 finished product protection
5.1 in light steel frame partition wall construction, each work teams shall ensure that installed project from being damaged, wire and tube and attached to the wall inside the wall equipment shall not touch moving, dislocation and damage.
5.2 light steel keel and gypsum board, storage in use process should be properly kept, ensure no deformation, not be affected with damp be affected with damp, no pollution, no damage.
5.3 construction parts installed Windows and doors, floor, walls, window, should pay attention to protect, prevent damage.
5.4 installed good wall shall not collision, keep the walls from being damaged and pollution.
6 should pay attention to quality problems
6.1 cover board is slit light steel keel gypsum panel partition quality common fault. Can overcome plate slit, focus on the board alone sewing processing, must be taken into account. Light steel keel structure is reasonable, first should have certain stiffness; Second, deformation of gypsum board can't be affected with damp be affected with damp, and light steel keel nailed to a solid; Three is juncture putty to fastidious, ensure that wall slip deformation when the joint is not open; Four is joint to be careful, in strict accordance with the operation process of construction. Only the comprehensive treatment, to overcome the common faults plate slit.
Light steel keel stone cover panel partition allowable deviation table 9-14
Will project allowable deviation check method (mm)
1 keel vertical 3 2 m line board check
2 3 feet, light steel keel keel spacing quantity check
3 keel flat 2 m by 2 feet check
4 surface is flat and level 3 m by 2 feet
5 cover panel facade vertical 4 2 m line board check
6 seam straight 3 5 m line inspection
7 seam height 1 with feeler check
8 bead bead flat 3 5 m line inspection
9 layering spacing 2 feet quantity check
6.2 more than 12 m long wall should be according to the design requirements for controlling deformation seam, to prevent because of the influence of temperature and humidity to produce wall deformation and fracture.
6.3 into the winter temperature period and has yet to live room, should control the heating temperature, and pay attention to open a window ventilated, to prevent the hot deformation and cracks.
6.4 light steel frame connection is not strong, the reason is that local nodes do not conform to the requirements of the structure, the partial node when installation should strictly in accordance with the regulations on the graph, nailed spacing, location, connection method should meet the design requirements.
6.5 cover wall panel, majority is caused by two reasons: one is the keel installation horizontal displacement; The second is gypsum board thickness is not consistent.
6.6 Ming concave joint not divide evenly, gypsum board pull seam size is not very good mastery, step size, and pay attention to during the construction of plate guarantee between seam is consistent.
7 quality records
This technology standard should have the following quality records:
7.1 light steel keel product certificate.
7.2 drywall product certificate.
7.3 the keel installation engineering quality inspection record separately.
7.4 paper gypsum cover panel component project quality inspection records.
The technology standard is applicable to industrial and civil building, light steel keel gypsum cover panel wall installation.
2 construction preparation
2.1 material and main equipments:
2.1.1 light steel keel, currently USES light steel keel partition wall engineering mainly support card series keel and penetration series keel. Light steel keel master pieces along the top edge to the keel, strengthen the keel, vertical (horizontal) to the keel, lateral brace keel. Light steel keel accessories have supported CARDS, cato, Angle, fittings, fixed pieces, protect horn, seam pressure, etc. Light steel keel configuration should meet the design requirements. Keel should have product quality certification. Keel appearance should be smooth, straight edges and corners, transition Angle and crack is not permitted in trimming and burr, wheat flour may have serious pollution, corrosion and mechanical damage.
2.1.2 fastening material: nail, expansion bolts, galvanized self-tapping screws (2 mm thick gypsum board for 25 mm long screw, two layers of 12 mm thick gypsum board with 35 mm long screw), wood screw, etc., should meet the design requirements.
2. L. 3 filler material, glass wool, mineral wool board, rock wool board, etc., choose according to the requirements of design.
2.1.4 gypsum board, gypsum board should have product certification. Specification shall conform to the requirements of design drawings. The general specification is as follows:
Length: according to the project need to be sure;
Width: 1200 mm and 900 mm;
Thickness: 9.5 mm, 12 mm, 15 mm, 18 mm, 25 mm. Commonly used to 12 mm.
2.1.5 seams material: joint putty, glass fiber tape (cloth), 107 glue.
2.1.5.1 WKF seam putty: > 3.0 MPa compressive strength, flexural strength > 1.5 MPa, final set time > 0.5 h.
2.1.5.2 50 mm in alkali glass fiber and glass fiber grid cloth:
> 80 g/m2, 8 orders/in
Breaking strength: 25 mm x 100 mm cloth, warp > 300 n
Zonal > 150 n
8.1.6 main machines: panel saw, electric scissors, electric tapping drill, electric saw, electric hand drill, nail gun, dc arc welding machine, scraper, line fall, on foot, etc.
2.2 operation conditions:
2.2.1 the main structure acceptance, waterproof layer roof have been finished.
2.2.2 indoor pop-up + 50 cm elevation lines.
2.2.3 homework environment temperature should not be lower than 5 ℃.
2.2.4 familiar with drawings, and makes detailed technical clarificaiton to operation team.
2.2.5 according to drawings and material plan, verify partition all the materials, so that it is complete.
2.2.6 the main structure of brick masonry walls, column, should be in partition junction, according to a 1000 mm distance between embedded anticorrosive wood brick.
2.2.7 pillow design requirements partition have land, should be to C20 pillow with the construction of fine stone concrete and strength to achieve more than 10 mpa, can the installation of light steel keel.
2.2.8 first as sample wall, identified after passing another large-scale construction.
3 the construction technology
3.1 process:
Pillow with line, step to do (design requirements) - fixed along the top, along keel -
Fixed frame to install vertical keel, keel installation to install additional keel, door, window frame
To check the keel installation, electrical installation support keel laying GuanAn attached to install the masks panel, equipment
Sound insulation material to cover installation on the other side panel, fill joints and corner protector to quality inspection, processing
3.2 line, step: in the partition wall on both sides of the upper and lower and substrate of place, should according to the width of the keel line. Play line clear, position accurately. According to the requirements of design, the combination of cover panel length, width step, to determine the vertical keel; The location of the cross arm and additional keel.
3.3 as a pillow with: when the design requirements, according to the design requirements for bean pillow with concrete. Pillow for land should die, beans cast concrete shall be compacted.
3.4 fixed along the item, along keel; Along the line location along a fixed, along the keel, nail or expansion bolt are available, and fixed point spacing should be not more than 600 mm, keel to scoop out flat.
3.5 fixed frame keel: along the elastic line position fixed frame keel, keel line should be with the line. End should be fixed, fastening point of the keel spacing should be no greater than lm, should be fixed firmly.
Border, between the keel and matrix seals shall be installed according to design requirements.
3.6 when choosing support card series keel, should first will support card installed on the vertical keel opening, card from 400 ~ 600 mm, distance from opposite sides of the keel is 20 ~ 25 mm.
3.7 installation should be perpendicular to the vertical keel, keel spacing should be in accordance with the requirements of design layout. Design requirements, the spacing can be according to the width, such as width of 900 mm, 900 mm, the distance between 453 mm and 603 mm respectively.
3.8 when choosing flux penetration series keel, below 3 m partition to install a; 3 ~ 5 m partition to install two; Install three more than 5 m.
3.9 cover panel transverse seams, if not on the along the top, along keel, should add lateral brace keel plate seam.
3.10 doors and Windows or special node, with additional keel, installation should meet the design requirements.
3.11 for special structure partition keel installation (such as curved surface, inclined partition, etc.), should comply with the design requirements.
3.12 electrical laying, installation of equipment: wall embedded pipes and attached equipment according to the requirements of drawings. A simultaneous requirements and the installation of the keel, or on the other side as gypsum board before, and local strengthening measures, fixed firmly. Electrical equipment laying pipelines in the wall, should avoid to cut off the horizontal, vertical keel, at the same time avoid set bottom line along the wall.
3.13 keel check correction reinforcement: cover panel before installation, should check degree of solid skeleton, partition door window frames, all kinds of attached equipment, pipeline installation and fixed meets the design requirements. If you have weak place, should be reinforced. Keel vertical deviation should be 3 mm or less, the facade surface uneven should be 2 mm or less.
3.14 installation gypsum cover panel:
3.14.1 plasterboard appropriate vertical laid, long side (i.e., bag sealing side) joint should fall on the vertical keel. Only partition for firewall, gypsum board should be vertical.
Plasterboard used appropriate lateral surface wall laid.
3.1.4.2 keel gypsum board and keel on either side of the side of the inside and outside two layer plasterboard should arrange staggered joints, joint shall not fall on the same root keel.
3.1.4.3 plasterboard used self-tapping screws. Along the drywall screw spacing around should not be greater than 200 mm, the middle section should not be greater than 300 mm screw spacing, screw and plate on the edge of the distance should be 10 to 16 mm.
3.14.4 installing a plasterboard, should from the plate to the plate in the middle of the four fixed edges, nail head slightly into the plate, but shall not damage the paper. Gypsum putty screeding nailhole applications.
3.14.5 plasterboard should use whole board. For docking, close to, but not crush in place.
3.14.6 partition wall around the end of gypsum board and wall or column should leave 3 mm slot. When construction, in the slot first filling sealing paste, then planking, squeeze the sealing paste and the adjacent surface close contact.
3.14.7 install firewall gypsum board, gypsum board shall be fixed on along the top, along keel, should be fixed up cross brace keel.
3.14.8 clapboard bottom as skirting board covered with wood, from the ground cover panel should be 20 ~ 30 mm; Marble, terrazzo, skirting board, the bottom cover panel should be flush with skirting board hooks, seam tightly.
3.14.9 laying within the walls of glass wool. Mineral wool board, rock wool board, such as filling material, plasterboard of face and installation on the other side at the same time, filling materials should be covered with smooth.
3.15 joints and protect horn handle:
3.15.1 gypsum board wall joint practice has three forms, namely, flat seam, concave joint seam and layering. Generally do flat seam is more, according to the following procedures:
3.15.1.1 gypsum board installation, the juncture place should be appropriate seam (usually 3 ~ 6 mm), and must be groove into the groove. Seam aggradation clean, after a 50% concentration of 107 glue solution.
3.15.1.2 with a small spatula sew WKF seams putty embedded plate, plate seam is covered in embedded real, scrape to evenness with mouth. To be bored with child after dry, to check whether there is crack sealing place, if any, to analyze the reason of crack, and caulking.
3.15.1.3 at the joint groove about LMM thick WKF putty scraping, and then paste the glass fiber tape, scrape to evenness compaction.
3.15.1.4 when putty solidifies and while they are still in the wet state, again a WKF putty, glass fiber with embedded in putty, fill leveling and joints.
3.15. L. 5 internal Angle seam processing method with flat seam.
3.15.2 Yang Angle according to the following methods:
3.15.2.1 Yang Angle paste two layers of glass fiber cloth, Angle on both sides have turned the 100 mm, paste method with flat sewing processing, surface scrape to evenness with WKF putty.
Article 3.15 2.2 when the design requirements for metal corner protector, according to the design requirements of position, height, a layer of putty scraping first, then use the galvanized nails fixed metal article kok, scrape to evenness with putty.
3.16 after being joints putty dry, to check whether there is crack plate joint, crack is found, must analyze the reason, take effective measures to overcome, otherwise cannot access panel decoration construction.
4 quality standards
4.1 ensure projects:
4.4.1 light steel keel, gypsum cover panel must have a product certificate, its varieties, type, specification should comply with the design requirements.
Inspection method: inspect the product certificate, and check control drawings.
4.1.2 light steel keel, fastening material should meet the design requirements and construction features. Installation of light steel frame should guarantee the stiffness, shall not be bent out of shape. Skeleton and matrix structure of connection should be strong, no loose phenomenon.
Inspection method: hand push and pull inspection and observation.
4.1.3 wall structure and horizontal laying should comply with the design requirements of gypsum board, the installation must be strong. Gypsum board shall not be affected with damp be affected with damp, warping deformation, lack of edge Angle, delaminating, fracture, thickness should be consistent.
Inspection method: hand push check and observation.
4.2 the basic items:
2 light steel skeleton along the top, along keel should be correct and the relative vertical position. Vertical keel should set a step accurately and integrity, no deformation, with expansion amount according to regulations (usually vertical keel length shorter than net 30 mm), nail spacing should comply with the requirements.
Inspection method: to observe the examination.
4.2.2 panel surface level off, clean, no hammer, spacing, nail nailed a should comply with the design requirements.
Inspection method: to observe the examination.
Holdings cover panel seam form should comply with the design requirements, joint and layering width is consistent, flat seam should be smooth, no cracks.
Inspection method: to observe the examination.
4.3 allowable deviation projects:
Light steel keel gypsum cover panel partition allowable deviation are shown in table 9 to 14.
5 finished product protection
5.1 in light steel frame partition wall construction, each work teams shall ensure that installed project from being damaged, wire and tube and attached to the wall inside the wall equipment shall not touch moving, dislocation and damage.
5.2 light steel keel and gypsum board, storage in use process should be properly kept, ensure no deformation, not be affected with damp be affected with damp, no pollution, no damage.
5.3 construction parts installed Windows and doors, floor, walls, window, should pay attention to protect, prevent damage.
5.4 installed good wall shall not collision, keep the walls from being damaged and pollution.
6 should pay attention to quality problems
6.1 cover board is slit light steel keel gypsum panel partition quality common fault. Can overcome plate slit, focus on the board alone sewing processing, must be taken into account. Light steel keel structure is reasonable, first should have certain stiffness; Second, deformation of gypsum board can't be affected with damp be affected with damp, and light steel keel nailed to a solid; Three is juncture putty to fastidious, ensure that wall slip deformation when the joint is not open; Four is joint to be careful, in strict accordance with the operation process of construction. Only the comprehensive treatment, to overcome the common faults plate slit.
Light steel keel stone cover panel partition allowable deviation table 9-14
Will project allowable deviation check method (mm)
1 keel vertical 3 2 m line board check
2 3 feet, light steel keel keel spacing quantity check
3 keel flat 2 m by 2 feet check
4 surface is flat and level 3 m by 2 feet
5 cover panel facade vertical 4 2 m line board check
6 seam straight 3 5 m line inspection
7 seam height 1 with feeler check
8 bead bead flat 3 5 m line inspection
9 layering spacing 2 feet quantity check
6.2 more than 12 m long wall should be according to the design requirements for controlling deformation seam, to prevent because of the influence of temperature and humidity to produce wall deformation and fracture.
6.3 into the winter temperature period and has yet to live room, should control the heating temperature, and pay attention to open a window ventilated, to prevent the hot deformation and cracks.
6.4 light steel frame connection is not strong, the reason is that local nodes do not conform to the requirements of the structure, the partial node when installation should strictly in accordance with the regulations on the graph, nailed spacing, location, connection method should meet the design requirements.
6.5 cover wall panel, majority is caused by two reasons: one is the keel installation horizontal displacement; The second is gypsum board thickness is not consistent.
6.6 Ming concave joint not divide evenly, gypsum board pull seam size is not very good mastery, step size, and pay attention to during the construction of plate guarantee between seam is consistent.
7 quality records
This technology standard should have the following quality records:
7.1 light steel keel product certificate.
7.2 drywall product certificate.
7.3 the keel installation engineering quality inspection record separately.
7.4 paper gypsum cover panel component project quality inspection records.
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