Installation of polyurethane sandwich panels in steel structure buildings

The polyurethane sandwich panel installation instructions are a recommended general installation rule, not a specific operating procedure. No liability is accepted for installation defects caused by incorrect installation techniques or other negligence. The installation quality of polyurethane sandwich panels for steel structures and the owner's satisfaction with the complete building depend on the experience, installation knowledge, installation equipment and usage skills of the installers.

1. Preparations before installation

(1) Before the formal installation of the steel structure building envelope system, it is necessary to check whether the following work is completed and meets the requirements:

①Whether the construction site is clean.

②Whether the electricity, construction road and communication are smooth.

③ Whether the main tools and equipment for installation are ready.

④ Review whether the installation surface has passed the handover acceptance, whether the flatness meets the specifications and the requirements of subsequent processes.

⑤ Whether the stacking of materials is orderly and meets the requirements of being free from pollution and damage.

⑥ Whether sufficient wind-resistant cables are prepared in case of being attacked by strong winds.

⑦ Whether the construction personnel are in place, whether the safety facilities are in good condition, and whether the health inspection and safety education are completed.

⑧ Whether relevant drawings and technical disclosure of key processes are completed and recorded.

⑨Whether the construction site first aid kit is equipped.

(2) The construction quality of the installation surface structure of the steel structure building envelope system shall at least meet the following requirements:

① Corresponding regulations in "Code for Acceptance of Construction Quality of Steel Structure Engineering".

②The connection point at the welding seam of the steel structure shall be smoothed, the protruding purlin shall be allowed to be no more than 2mm, and obvious unevenness on the outer wall shall not be allowed.

③ When there is nailing at the transverse purlin, the purlin spacing shall not be less than the board width of the polyurethane sandwich panel, and the transverse purlin is required to be straightened, and obvious downward deflection is not allowed.

④When the purlin is partially deformed, it cannot affect the flatness of the sandwich panel and the length of the nail penetration.

Note: If the structure of the installation surface cannot meet the installation requirements of the enclosure system, please contact the technical staff of our company in time to obtain the structural plan and ensure the installation effect.

(3) Requirements for installation and construction personnel

①The installation and construction personnel should carry out brief technical training before operation, and can use this instruction book as a teaching material to make technical disclosure.

(4) Recommended installation tools and equipment

Installation tools and equipment vary with building size, complexity and installers. The following list is only a general recommendation, and the installation unit should determine it according to its own judgment and technical experience. In addition to the rental of lifting equipment, the following equipment and tools are the standing tools of the installation unit.

(5) Plate unloading and stacking

A. Plate arrives on site

After the polyurethane sandwich panel arrives at the project site, the construction personnel should carefully check whether the model, specification and quantity of each item are consistent with the delivery schedule, and whether there is any transportation damage. If you find any problems such as lack or damage, you should promptly notify the relevant customer service personnel of the company to solve them.

B. Unloading

①When unloading with a forklift, a spacer should be added on the forklift to prevent scratching the material; move the forklift to a reasonable position in the cargo box of the truck, align with the gap under the material and then unload the truck; the sandwich panel should be balanced on the forklift. To avoid slipping, if the board is too long (more than 8m), more than two lifting devices are required to cooperate with the unloading.

②When lifting and unloading with a crane, spacers should be placed on both sides of the sling to prevent the sling from crushing the male and female ports of the polyurethane sandwich panel, avoid affecting the installation and use, and place it in a suitable location for easy installation.

③ When unloading the truck manually, the handling personnel should wear gloves, grasp the position where the edge of the PU sandwich panel has good strength, and the force should be even, so as to ensure the balance of the board surface as much as possible to prevent creases. Care should also be taken to avoid the collision between the PIR sandwich panel and the carriage to prevent scratches, and it is strictly forbidden to drag the material.

C. to stack

①The materials of the enclosure system of the steel structure building should be placed in the warehouse or shed as much as possible. If it is to be placed in the open air, the support pad must be flat, and the upper part has a good wind and rain cover, and it is strictly forbidden to get wet in the rain.

②When the polyurethane sandwich panels are stacked on site, the ground block should be inclined to facilitate drainage. Stacks of sandwich panels should have gaps between each bundle, covered with plastic or tarpaulin to protect against rain and snow. The lower part between the covering and the sandwich panel should be open to facilitate air circulation. Also add warning signs and place safety objects.

③The flashing board and the edging board should be stacked neatly by category. There should be pads on the lower part and rain cover on the upper part.

2. Steel structure building envelope system installation

(1) Handling, storage and hoisting of enclosure panels

① The handling personnel should wear gloves, and the number of personnel should be selected according to the length and model of the board.

② After lifting the polyurethane sandwich panel to the installation area, it is necessary to punch down the female port and place it on the foam board, with the outer board facing out, so as to facilitate the placement of the corner board for the next step of hoisting.

(2) Installation of bottom balance bracket, flashing parts and starting panel

①The installation of the entire wall is based on the starting panel, so the installation of the flooding parts at the bottom of the board and the balance bracket at the bottom of the board should be done with the help of leveling tools such as leveling instruments.

② When the flashing parts at the bottom of the board are fixed with self-tapping screws, the spacing should be kept at about 1.5m to ensure the smoothness of the flashing parts and enhance the aesthetic effect. It is advisable that the distance between the balance brackets at the bottom of the board should not exceed 2m.

③ Insert the horizontal laying starting board into the balance bracket at the bottom of the board to fix it. After the installation is completed, the number of nails at the male opening should be controlled at a distance of 1.5m. 2 nails are required for the nail position.

④ Pay attention to the position of the nails and the strength of the nails at the junction of the two wall panels.

(3) Installation of corner panel

In order to ensure the straightness of the board seam, if there is a corner board, the installation of the corner board is given priority.