1. Features:
Using a steel keel substrate and fixed with rivet nails, it has a good look and feel and is easy to control the quality.
2. Scope of application:
This construction method is suitable for exterior wall aluminum-plastic panel decoration projects.
3. Materials:
(1) Section steel. Including square tubes, angle steel and other profiles.
(2) Aluminum plastic panel. Qualified products that meet the requirements of design drawings and specifications.
(3) Aluminum profiles. 70*20*2 angle aluminum
(4) Expansion bolts and bolt connectors.
(5) Glue strip, weather-resistant glue.
4. Machinery and equipment:
Brushing guns, scaffolding, electric hammers, jigsaws (including various angle planers), wrenches, electric welders, Angle grinder.
5. Operation process
(1) Process flow:
In principle, it is bottom-up When installing the wall, the specific construction can be arranged separately according to the on-site construction conditions.
Hang straight, square, find the rules, stretch the thread → fix the frame’s connector → fix the frame → install the metal veneer → close the structure → scrub and clean
(2) Production process requirements:
a Lifting straight, square, finding rules, and springing lines:
First of all, according to the design drawings According to the requirements and geometric dimensions, the wall with metal veneer panels must be lifted straight, squared, found, and measured and stretched to determine the size and quantity of the veneer wall panels.
b Connectors to fix the skeleton:
The horizontal and vertical members of the skeleton are fixed to the structure through connectors, and the connections between the connectors and the structure , can be welded firmly with the embedded parts of the structure, or expansion bolts can be driven on the wall. Because the latter method is more flexible, has smaller dimensional errors, and can easily ensure the accuracy of the position, it is often used in actual construction. Lines must be drawn at the bolt positions and holes must be made according to the lines.
c Fixed skeleton:
The structure is as shown in the attached figure. The skeleton should be pre -pre served. The position of the installation frame must be accurate and the combination must be firm. After installation, the centerline, surface elevation, etc. should be fully inspected. For the exterior walls of high-rise buildings, in order to ensure the installation accuracy of decorative panels, it is advisable to use theodolite to penetrate the horizontal and vertical rods. Deformation joints, settlement joints, etc. should be properly handled.
d Metal facing installation:
The installation sequence of wall panels is from the vertical part of each wall to the first piece at the bottom of the first row Start with the board and install from the bottom up. After installing the first row of the wall, install the second row. After every 10 rows of wall panels are installed and laid, the wiring should be checked once to eliminate errors in a timely manner. In order to ensure the appearance quality of the wall, the bolt positions must be accurate and fixed with hook-shaped bolts constructed on one side so that the bolts are positioned horizontally and vertically. There are two main methods commonly used to fix metal veneer panels. One is to screw the laths or square plates onto the steel or wooden frames. This method has better durability and is mostly used for exterior walls. The other is to clamp the slats on a special keel. This method is mostly used indoors.
The gap between boards is generally 10 to 20mm, and is often treated with rubber strips and weather-resistant rubber elastic materials. When the decorative panel is installed, be sure to cover and protect parts that are prone to contamination with plastic film. Parts that are easily scratched or touched should be protected by safety railings.
e closing structure:
The structure is as shown in the attached picture. The pre ssing of the horizontal parts, the closing of the ends, the treatment of expansion joints, the handover treatment of two different materials, etc. are not only related to the decorative effect, but also have a great impact on the use function. Therefore, special formed metal plates with similar properties of two materials are generally used for proper processing.
The structure is relatively simple and the corner processing method is mostly to use a thicker (1.5mm) right-angled metal plate, which is firmly connected to the exterior wall panel with bolts, and the corner part is processed See attached picture.
The window sill and the upper part of the parapet are all horizontal parts, as shown in the attached picture. That is, they are covered with aluminum-plastic panels to pre vent wind and rain from soaking. To fix the horizontal bridge, the steel frame is usually welded on the base layer first, and then the cover plate is fixed to the frame with bolts. The connection between the cover plates is directly carried out by overlapping (high places are suppre ssed and low places are pre ssed down, the overlap width meets the design requirements, and is sealed with weather-resistant glue).
(3) Quality standards:
Quality standards should comply with Beijing standards "Advanced Building Decoration Engineering Quality Inspection and Assessment Standards 4.4 Metal Finishes" DBJ01 Specification standard requirements in -27-96.
1. Generally, the labor and material quotation at the door is about 200 yuan. The simple aluminum-plastic panel materials are good and bad, and the posting skills are suitable. The thickness of the board is 3 mm, and the thickness of the board suitable for dry hanging technology is 4 mm, and the price difference is also relatively large.
2. Generally, the base layer of aluminum-plastic panels for exterior walls is not made of light steel keels. External walls generally adopt a dry-hanging process in consideration of the effect of sun protection and waterproofing. The aluminum-plastic panels are bent and fixed on square tubes. On the top, use foam rods to fill the seams between them, and use 995 structural glue to fill the seams on the outside. The general price of dry-hanging aluminum-plastic panels for exterior walls is around 280 yuan/square meter.
3. The price of aluminum-plastic panels ranges from 120 yuan to more than 300 yuan per square meter. Stone-like aluminum-plastic panels are still a relatively new decorative material, and of course are rarely used in home decoration.
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