Tuesday, December 27, 2016

Wood frame cover panel ceiling construction technology

Wood frame cover panel ceiling construction
1 scope
The technology standard is applicable to industrial and civil buildings ceiling mounted with wooden frame in all kinds of cover panel ceiling installation.
2 construction preparation
2.1 material:
2.1.1 wood, wood skeleton material must be dry, red without distortion. White pine tree species, and fire prevention according to the design requirements; Huanghua pine have to use. Water keel specifications according to the individual design requirements, such as design without the specific provision, big keel specifications for 50 mm or 50 mm x 70 mm x 70 mm; Small keel specification x 50 mm to 50 mm or 40 mm x 60 mm; Derrick specification x 50 mm to 50 mm or 40 mm x 40 mm.
2.1.2 cover face plate and layering: according to the selection of design, material and specification standards strictly.
2. L. 3 other materials: round nails, from 6 or 8 bolts, nail, expansion bolts, adhesive, wood preservatives and 8 galvanized iron wire, galvanized iron wire).
2.2 the main equipment:
2.2.1 machinery: small chainsaw, small bench plane.
2.2.2 electric tools: electric hand drill.
2.2.3 hand tools: wooden plane, plane, line groove, saw, ax, hammer, screwdriver, hand drill, etc.
2.3 operation conditions:
2.3.1 cast-in-place reinforced concrete slab or precast floor seam, according to the design of embedded condole top fixed parts, such as the design demands, can be embedded from 6 or 8 reinforced, distance is about 1000 mm.
2.3.2 for masonry wall, should according to the ceiling level, on the wall around the embedded wood brick of fixed keel.
2.3.3 ceiling in all kinds of pipeline and ventilation pipes, shall be installed, and handle the acceptance of the sequel.
2.3.4 wooden keel, direct contact with the civil structure should brush preservatives in advance.
2.3.5 condole top room need do metope and ground wet operation and roofing waterproof engineering, etc.
2.3.6 set ceiling construction operation platform.
3 operation process
3.1 process:
Play the ceiling elevation level - step cross keel line - installation to install large keel, pipeline facilities

Small keel to anti-corrosion treatment, installation to install layering cover panel

3.2 play elevation level: according to the floor elevation, horizontal along the wall to ceiling design elevation in quantity and high, along the wall around the ceiling level is horizontal.
The step cross keel line 3.3: has rebounded good ceiling elevation, horizontal row good keel along line of position.
Ceiling installation of pipeline facilities within 3.4: before the roof construction of the professional pipeline facilities should according to the ceiling of the elevation control, according to the professional construction drawing installed, and the crackdown on test and inspection charge.
3.5 installation: big keel will be embedded bar end bent into a ring round jun, wore no. 8 galvanized iron wire or use from 6, 8 bolt will be big keel fixed, not when embedded bar available expansion bolts, and ensure the design elevation. Condole top of the arch since according to the design requirements, design requirements, general span of 1/200 ~ 1/300 for the room.
3.6 installation small keel:
3.6.1 small keel floor should wrot, leveling, cross section thickness should be consistent.
3.6.2 small keel spacing should be according to the design requirements, design requirements, specifications shall cover panel decision, general for the 400 mm to 500 mm.
3.6.3 press along the line, install two long side keel, first guy looking for the arch, each small keel wriggle through the earth according to the elevation, through short derrick will be small keel with round nails fixed on the large keel, derrick to stagger by root, not on the same side of the hanging on the keel. Tong long small keel joint should be staggered, adopting double splint with round nail up a screw dislocation, joint on both sides of the at least two each nail nails.
3.6.4 radar echoes captured small keel card file: press the passing long small, keel elevation between two tube long small keel, according to the requirements of the cover face plate block size and seams, in long small keel floor transverse play along the line, press line to bottom leveling nailed down the small keel.
3.7 embalmed: ceiling all open iron, nail cover before the panel did not make good anti-rust treatment must brush anti-rust paint, wood frame and structure of interface should be embalmed.
3.8 installation department panel: in wooden frame bottom cover installation of ceiling panel, the variety of cover panel is more, should according to the design requirements of varieties, specifications and fixed way into round nailing fixation method, wood screw screw fixation method, cementing cementation method three ways.
3.8.1 round nail fixation method: this method is more used to cover panel installation of plywood, beaverboard integratedly. In has been installed below the wooden frame and experience, according to the cover of the specifications of the panel and the gap, in keel floor partition line, in the middle of the ceiling shun tong long small keel direction, to be packed in a line as a benchmark, and then to install on both sides. Fixed hood panel nail distance is 200 mm.
3.8.2 wood screw fixation method: this method is used to more plastic board, gypsum board, asbestos board. Before installation to cover panel edges according to the first drilling screw spacing, the installation program and the method is basically the same round nail nail fixation method.
3.8.3 cementing cementation method: this method is used to more calcium plastic plate, sheet before installation should be equipped with nap, uniform thickness, size, edge stare blankly neat. Should be done before each cover panel paste pre-installed, then in the pre-installed keel box bottom brush glue area, at the same time around the cover panel brushing glue, cementing width of 10 mm to 15 mm, after 5 ~ 10 min, to press the cover panel on pre-loaded with parts. Each roof from middle row first, then to be put on both sides of the branch paste, adhesive as stipulated in the design, design requirements, should be after the test is generally available 401 glue.
3.9 installation layering: wooden frame cover panel ceiling, the design requirements using layering approach, for a cover panels after installation, all of layering position play line first, layering installation according to line. The fixed methods, generally with the cover panel, nailed spacing is 300 mm, cement paste is also available.
4 quality standards
4.1 ensure projects:
4.4.1 skeleton wood and the material of cover panels, varieties and specifications, style, should comply with the design requirements and norms.
4.1.2 wooden keel skeleton derrick, size must be installed firmly, no looseness, location is correct.
4.1.3 cover panel no delaminating, warping, fracture, lack of edge drop defects such as; Installation must be strong.
4.2 the basic items:
2 wood skeleton derrick, keel should be straight, no bending, deformation and wall crack.
4.2.2 cover panel surface should be smooth, clean, no pollution, pitting, hammer, the same color.
The gaps between the holdings cover panel or layering, width should be consistent, neat, straight, layering and plate joint closely.
4.3 allowable deviation projects, see table 9-12.




Table 9-12
Items are similar project allowable deviation (mm) test method
Plywood plasterboard asbestos board plastic fiber board calcium plastic board
1 2 2 2 2 2 2 feet keel keel spacing quantity check
2 flat keel keel 3 3 3 2 2 2 feet quantity check
3 keel arch height to plus or minus 10 + 10 + 10 + 10 + 10 + 10 guy, 'quantity check
Keel frame around the level 4 + 5 + 5 + 5 + 5 + 5 + 5 'quantity or level examination
5 keel surface is flat and level 2 2, 3, 3 3 3 check with 2 m by ruler
6 cover flat slab joints of CFRD is 3 3 3 3 3 3, 5 m line inspection
7 seam height 0.5 0.5 1 1 1 1 with straightedge or feeler check
8 near the ceiling level + 5 + 5 + 5 + 5 + 5 + 5 arrows or use the level check
9 bead bead flat 3 3 3 3 3 3, 5 m line inspection
10 layering spacing 2 2 2 2 2 2 feet quantity check

5 finished product protection
5.1 ceiling wooden frame and the cover panel installation, should pay attention to protect the ceiling built-in good pipeline, equipment; The derrick wood framework, keel are not allowed to be fixed on the ventilation pipe and other equipment.
5.2 construction parts installed Windows and doors, have completed the construction of the ground, walls, window, etc., should pay attention to protect, prevent damage.
5.3 wood skeleton materials, especially the cover panel, in the process of entry, storage, installation, should be properly management, make its not damaged, and not be affected with damp be affected with damp, deformation, no pollution.
5.4 other professional crane accessories shall not be hung on the installed good wood frame.
6 should pay attention to quality problems
6.1 condole top is rough; Little keel installation elevation of the positioning is not allowed. Construction should pull wire, with accurate elevation, arch camber.
Fixed rickety wooden frame 6.2: big keel connected to the hanging method should be strictly in accordance with the requirements of design structure construction, keel nail fixation method should conform to the requirements of design and construction specifications.
6.3 cover panel block the gap between them are not straight, width is not consistent: plate should be paid attention to during the construction of specifications, the size of the block, the correct installation position.
Article 6.4 seam pressure, pressure side is not strict, not straight: construction should play position line, cover panel installation seams should be straight, close to dense pressure seam article and the cover panel.
7 quality records
This technology standard should have the following quality records:
7.1 wood should have grade quality certificate and drying of material test data.
7.2 cover panel should have the factory certificate.
7.3 acceptance of work should have the quality inspection evaluation data.

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