The project is a national grain storage roof color steel plate project in the eastern part of Heilongjiang. The design requirement is rock wool on-site composite color steel plate. Due to the limitation of on-site construction conditions, the lower color steel plate needs to be installed on the upper part of the purlin. Moreover, affected by the fire in the outer area of ​​Harbin, the construction unit of the project required strict use of rock wool board with fire rating A as insulation material. Project Description: This project is a national grain storage roof color steel plate project in the eastern part of Heilongjiang. The design requirement is rock wool on-site composite color steel plate. Due to the limitation of on-site construction conditions, the lower color steel plate needs to be installed on the upper part of the purlin. Moreover, affected by the fire in the outer area of ​​Harbin, the construction unit of the project required strict use of rock wool board with fire rating A as insulation material. (Instead of rock wool felt), it has formed a relatively unique construction process for this project, which is relatively rare in the entire Heilongjiang color steel plate construction project. We named it "the construction method of the rock wool board on-site composite color steel plate ceiling without attached keel". The following is a description of the construction process:
First, the project selection:
1. Roof inner panel: The inner color steel plate of the project roof is made of 0.5mm thick C10 type European color steel plate. This color steel plate model is more suitable for the inner plate of industrial building than the traditional V-900 color steel plate, which is beautiful and economical. The angles are even better. The advantages and disadvantages of the two parties are not repeated here. For details, please refer to Baidu search "C10 color steel plate in the field composite enclosure system" to understand the relevant content;
2, roofing outer panel: V-820 type seaming connection color steel plate, this type of roof is the most cost-effective plate type in the roofless nail system, widely applicable to the roofing system of industrial buildings of 20 meters to 50 meters span;
3. Rock wool board: The rock wool board produced by the well-known domestic enterprises is designed to have a thickness of 100 mm. Considering the prevention of cold bridge during construction, the double-layer 50 mm thick rock wool board is treated with the wrong seam. The density of the rock wool board is 100 kilograms per cubic meter, taking into account its weathering, drowning and other properties;
4, the seam bracket: the height bracket is used, the height is 151 mm; (V-820 peak height 51 mm + insulation thickness 100 mm = 151 mm)
5, self-tapping screws: the national standard screws are required to ensure that the roof system and the purlins are firmly connected and durable;
Second, the construction sequence:
1. Installation of roofing floor: It can be installed according to the installation standard of ordinary on-site composite color steel plate. It is required to ensure horizontal and vertical, no missing nails and no pedaling deformation. The spacing of the roofing strips of this project is 1.5 meters. Special attention should be paid to the construction personnel during construction. Protection measures for color steel plates when the roof moves);
2, the mounting bracket: In order to prevent the occurrence of cold bridge phenomenon, the lower part of the bracket is cut into a 55*55 size pad to the lower part of the bracket by using a 3 mm thick rubber plate;
3, paving rock wool board: pay attention to three points when paving rock wool board: First, the wrong seam paving, the second is to be as accurate as possible when the bracket opening, and third, the opening position should be sealed after paving ;
4, install the upper board, followed by the seam connection;
5. Install the roofing system;
Third, the roof system prevents the construction of cold bridges:
1. Place a 3 mm thick rubber plate on the lower part of the bracket and the C10 color steel plate to prevent the formation of a point cold bridge formed in this part;
2. The rock wool is opened. After the pavement is in place, the opened holes need to be refilled. The materials that can be used are rock wool, glass wool, foaming agent, etc. The best material is glass wool, which can be fully filled. . It is not recommended to use a blowing agent for filling;
3. The rock wool board turning place on the ridge should be carefully constructed. The rock wool board should be bent in place. If the rock wool board rebounds greatly, the rock wool board can be cut off along the ridge direction on the inner side of the workshop. Bending after 20 mm, the slope transition can be achieved;
4. Due to the cold weather in the northeast, the installation of the Heilongjiang color steel plate needs to take seriously the problem of preventing the cold bridge. The installation team should strictly abide by the operating procedures during the installation process, so that there are no missing points. Otherwise, once there is a cold bridge problem, the after-care work is quite troublesome;
Fourth, rock wool board opening construction method:
1. Because this project needs to install the seaming bracket first, and then install the rock wool board, so the rock wool board involves paving after opening;
2. Opening method 1: Using a hole opener with a diameter of 90 mm to install the hole in the electric drill, the efficiency is relatively high, and the disadvantage is that the aperture is too large, and the filling amount is relatively large in the later stage;
3. Opening method 2: Use the alloy steel band saw blade to manually open the hole according to the upper end of the bracket. If it is accurate, the opening size can be controlled to 30*80. This opening method can reduce the opening size to the drill. 36% of the hole;
V. Respiratory protection and protection from aerial work:
1. This project involves the on-site cutting and opening of rock wool board. At that time, the air will contain dust. Please wear masks during construction to prevent inhalation of dust;
2. The spacing of the roofing strips of the project is 1.5 meters, which is more than the distance that ordinary construction workers can span in one step. Please pay attention to safety and take corresponding protective measures during construction. At the same time, pay attention to unnecessary damage caused by roof installation activities to the lower color steel plate, and maximize the protection of existing construction results;
To sum up: the installation of the envelope structure of any industrial building must be based on the aspects of sturdiness, beauty, waterproof and safety. The installation plan of the system should be considered in the Heilongjiang area. No matter how the color steel plate and insulation materials are changed, as long as the projects are implemented according to these engineering factors and implemented, it is sure to be able to install high-quality projects!
For more exciting content, please visit Heilongjiang Zhongjie Steel Structure Engineering Co., Ltd.**
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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