What problems need to be paid attention to when installing plywood?

Springline. During construction, the ink line should be closed on the ground, wall, and flat top. Install the upper and lower sills.

When the wooden partition wall is connected with the brick wall, the upper and lower sill must extend into the brick wall at least 300px. The vertical reinforcement is positioned and installed first, and then the vertical reinforcement position line is drawn on the upper and lower sill according to the spacing required by the design, and the spacing is generally 40-1250px. If there is a door, each side of it needs to stand a bar, and the upper part of the door and window should be nailed into the word support.

Between the vertical braces, a nailed cross brace should be added every left and right. The installation of the vertical reinforcement of the partition wall should be in the correct position and firm. Horizontal flute installation.

The horizontal flute must be installed according to the requirements of the construction drawing, and its spacing should match the specifications and dimensions of the plate.

The transverse flute should be nailed horizontally to the vertical bar, and the two sides are flush with the vertical bar. If there are doors and windows, the upper and lower windows and the door should be added with horizontal flutes, the size of which is 2-75px larger than the door and window openings, and the doors and windows should be nailed at the same time when nailing the partition wall. Cross brace reinforcement.

The vertical reinforcement of the partition wall should not be perpendicular to the cross brace, but should have a certain inclination in order to wedge and nail, so the length of the cross brace should be 10-15mm longer than the clearance size of the vertical bar, and the two ends should be slightly sawn into an inclined plane in the opposite direction. Base plate and panel installation. When a double-layer plate structure is adopted, the transverse flute and the transverse brace can be combined into one.

During installation, the line should be played on the vertical rib and horizontal flute, and the panel (or base plate) should be nailed after checking the verticality and flatness of the skeleton. In the case of double-layer boards, the seams should be staggered from each other. Cover strip and skirting board installation.

The cover strip must be tightly combined with the ceiling and wall, leaving no gaps, and the corners must be cut and spliced. It can be attached to the panel by glue bonding or nail fixing. The baseboard should be installed firmly and straightly.

The plywood partition wall is made of wooden keel, and the wall reinforcement should be erected first during construction, and the spacing of the vertical reinforcement should be matched with the specifications of the board, generally 40 1500px, after nailing into a square frame, nail the plywood on one or both sides of the wall reinforcement, and the board seam is 3-7mm, and cover it with a wooden strip. Before the installation of the plywood cover, the substrate should be treated, the surface should be made of linoleum, and when the oil paper is moisture-proof, it should be laid flat, the angle should be tight, and there should be no wrinkles, cracks and holes. For rooms with high humidity, plywood that has not been waterproofed should not be used.

The base of household appliances should be firmly installed, and its surface should be flush with the bottom surface of the plywood cover. The junction between the door frame or bobbin and the plywood cover should be flush and covered with a face board. The lower end of the plywood cover of the wall and column, if covered with a wooden baseboard, the plywood cover should be 20 30mm from the ground; If marble or terrazzo baseboard is used, the lower end of the plywood cover should be flush with the upper mouth of the baseboard, and the seams should be tight.

The partition wall is not firmly fixed to the structure or skeleton. The reason is that the size of the skeleton material is too small or the material is poor; The upper and lower sill and the main structure are not firmly fixed, and the vertical rib cross brace (flute) does not form a whole with the upper and lower fixed cross ribs; The installation is improper, that is, the vertical bar is installed first, and the upper and lower sill are disconnected; The lower sill at the door is disconnected, the cross-sectional size of the vertical ribs on both sides is not increased, and the upper part of the door and window frame is not nailed into the word brace. Therefore, the selection of grids should be strict, and all wood with decay, splitting, twisting, knotted scars and other defects shall not be used; And the upper and lower sill should be firmly connected with the main structure; The skeleton fixing sequence should be the lower sill first, then the upper sill, then the frame, the vertical bar, and finally the horizontal cross brace; When encountering the door, it is necessary to add a bar, and the lower foot is embedded in the floor slab, and its cross-sectional size should be increased to 80mm 70mm, and the upper part of the door and window frame should be nailed into the word brace.

The walls are rough and the joints are uneven and loose. Due to the large moisture content of the skeleton material, it is deformed after drying; The process arrangement is unreasonable; When selecting the panel, moisture-proof and waterproof are not considered, and the board surface is rough and has different thicknesses; The order of the nail board is improper, the seam is not strict or the assembly is not standardized, resulting in uneven surface. Therefore, the selection of materials should be strict, the skeleton should be assembled strictly according to the line, the size should be consistent, the square should be straight, and the junction should be smooth; The process should be reasonable; The plate should be nailed block by block from bottom to top, and the joint should be located on the vertical bar or cross brace.

The details are not in order. Failure to make technical disclosures; The construction operation is not serious. Therefore, it is necessary to be familiar with the drawings, discuss with the designer, and properly handle every detail of the structure; Strengthen technical guidance and supervision of operators.

1) Top formwork: first on the scaffold horizontal paving of wood, spacing meters, and then longitudinal paving of wood, spacing of meters, when the thickness of the poured concrete exceeds 200 mm, the spacing should be small.

2) Wall formwork: After the plywood, three wooden squares are laid longitudinally, and then two wooden squares are connected horizontally, and the position of the wall screws should be left and the diagonal brace should be erected. Conditionally, the transverse can be connected with steel flutes to form a combined large wall formwork, which can be directly hoisted. It can be dismantled and replaced with a single template.

3) Beam and column formwork: cut the template according to the size, reserve the position of the wall bolts, and the column formwork can be locked on four sides of the short scaffold, and the diagonal brace is erected.

4) Clean the panel: the first three times of plywood can be used without release agent, and the board surface should be cleaned in time after each use in the future, and it is strictly forbidden to scrape the board surface with a hard object.

5) Construction attention: After the plywood is paved, before pouring concrete, please be sure to pay attention to the coverage to prevent exposure to the sun, resulting in the bursting of the board surface; Please pay attention to handle the mold gently when removing the mold to avoid high-altitude falls; After removing the mold, please be sure to clean the board surface and brush the release agent in time; For the time being, be sure to pad the wooden square, and neatly stack it in a dry and ventilated place. 1. There is a difference between the front and back of the splint.

When choosing, the plywood should have a clear wood grain, a smooth and smooth front, no roughness, and a smooth and non-sluggish feel.

2. The plywood should not have defects such as damage, bruises, hard injuries, and scars.

3. There is no degumming phenomenon of plywood.

4. Some plywood is made of two veneers with different textures pasted together, so it should be noted that the splint seam should be tight in the selection, and there is no unevenness.

5. When selecting splints, attention should be paid to selecting splints that do not fall apart. If the sound is brittle when the plywood is knocked by hand, it proves good quality, and if the sound is muffled, it means that the splint has fallen loose.

6. When selecting glued veneer, it is also necessary to pay attention to the uniform color, consistent texture, and the color of the wood and the color of the furniture paint. 1) According to the nature of the project, the use of parts, environmental conditions and other factors, the selection of different types, grades, materials, decoration and format of plywood.

2) The decoration should be made of precious wood, planed and thin-wood-veneered plywood.

3) The plywood used for the interior decoration of the building shall comply with the provisions of GB50222 "Code for Fire Protection of Building Interior Decoration Design".

4) The hidden part that may be damp and the occasions with high waterproof requirements should be considered to use plywood or class, and the plywood used outdoors should be selected like plywood.

5) Transparent varnish (also known as clear oil) should be used for panel decoration to retain the natural color and texture of the wood surface, and the selection of panel material, pattern and color should be emphasized; If you do not need to consider the pattern and color of the panel, you should also reasonably select the grade and category of plywood according to the environment and cost.

The following points should be mastered when selecting: (1) There is a difference between the front and reverse positions of the splint. When choosing, the plywood should have a clear wood grain, a smooth and smooth front, not rough, and flat.

2) The plywood should not have defects such as damage, damage, insect residue, nail holes, dead joints, burr grooves, etc. 3. There is no degumming phenomenon of plywood. (4) Some plywood is made of two different textures of veneer adhesive patchwork together, so it should be noted when choosing, the splint seam should be tight, and there is no unevenness. In particular, there should not be two different lines on a piece of plywood, otherwise it will hinder the rational use, cause waste, and affect the beauty of the furniture.

5. When selecting splints, attention should be paid to selecting splints that do not fall apart. You can use a wooden stick of about 1250px to lift the plywood and gently knock on each part, and the sound is symmetrical and crisp, which is basically the inner board; If there is a "shell" sound, it is likely to be caused by degumming or bubbling and other internal quality problems. This kind of board can only be used as a lining board, or a top and bottom plate with a bucket hand, and cannot be used as a fabric potato grip.

6) When selecting plywood, it is necessary to pay attention to the harmony between the wood color and the paint color of the furniture.

Plywood is made of three or more layers of plate-like material made of wood that is rotary cut into veneer or cut into thin wood by wood planer, and then glued together with adhesive, usually with odd layers of veneer, and the fiber direction of adjacent layers of veneer is glued perpendicular to each other. Here are some simple ways to pick and distinguish the quality of plywood: First, the defects that are not allowed in any grade of plywood are open glue (plywood layers are separated) and bubbling (there is a sheet of skin on the back of the face that is not glued to the core board, so it bulges slightly in a small piece).

These two defects will directly affect the use of plywood. 1. Distinguish the panel grade 2, determine the flatness and magnanimity of the brigade 3, check the quality of the sensitive core board 4, test the strength 5, measure the thickness 6, smell and environmental protection.

Plywood is one of the commonly used materials for furniture, one of the three major wood-based panels, and can also be used for aircraft, ships, trains, automobiles, construction and packaging boxes. A group of veneers is usually glued together perpendicular to each other in the direction of the wood grain of adjacent layers, and the surface and inner layers are usually symmetrically arranged on both sides of the central layer or core. It is made of a slab made of glued veneer crisscrossed in the direction of the wood grain, pressed under heated or unheated conditions.

The number of layers is generally odd, and a few have even numbers. The difference in physical and mechanical properties of vertical and horizontal selling is small. Commonly used types of plywood are plywood, plywood, etc.

Plywood can improve the utilization rate of wood and is a major way to save wood. The usual length and width specifications are: 1220 2440mm, and the thickness specifications are generally mm, etc.

Among the main tree species are: eucalyptus, birch, beech and so on.

Selection criteria: plywood has a difference between the front and back, in the selection, the plywood should have a clear wood grain, the front is smooth and smooth, not rough, and it should be smooth and have no lag feel. The plywood should not have defects such as damage, bruises, hard injuries, knots, etc.

There is no degumming of plywood. When choosing plywood, you should pay attention to choosing a plywood that does not open the glue. If the sound is brittle and hollow when you knock on all parts of the plywood, it proves that the quality is good, and if the sound is muffled, it means that the plywood has been opened.

Jisheng Tang Dynasty beech wood and eucalyptus wood as raw materials to produce the whole core of the whole piece of beech plywood not only has the advantages of uniform wood color, clear texture, high hardness, low formaldehyde release, etc., beech plywood also has the advantages of good load-bearing performance and good compressive resistance, and is often used in shipbuilding, construction and bridges.