connections:
The number of connections and the distance between the two supports should be determined by the manufacturer of this important adjustment depending on the wind loads and with reference to the tolerance tables and the loading span. Connections are made linearly. Connections are applied with the help of latches and necessary fasteners along with washers at a distance between 300 and 400 mm.
In the roof guides, special attention should be paid to the connection between the insulation. Also, the acceptance polyurethane gasket should be used to fix and tighten all the fixed surfaces. This is important to prevent proper provision of air and water. It is also used. Sandwich panels should be fixed by clamps first and then Place the backs of the straps on each other at an angle of 45 degrees and change the location. Different manufacturers use different types of screws. In a general classification, screws can be divided into two types: primary and auxiliary (secondary).
number of screws
The required number of screws for each area is obtained by using the pressures caused by the wind and loading and taking into account the calculation, the amount of deflection. In fact, these companies suggest in the optimal state and it should be taken as an example, for example, the permissible axial force should be used in the calculations. Due to the fact that a small screw diameter with a relatively long length is used in sandwich panels, there is also a possibility of bending and breaking the screw (shearing). One of the defects that can always be caused is deviation and failure in the screw head, one of the options can be thermal expansion and contraction. Regardless of the load distribution grids, it is necessary to have at least 35 mm of screws from the edge of the panel. This important is applicable for both wall and panel facade, if a panel use the edge may be reduced, but never less than 15 mm.
Implementation steps:
Offers:
1- The use of special tools for cutting such as flat saws and circular saws with the minimum number of teeth is recommended. The number of teeth is at least 5 and also having a guide to achieve higher dimensional accuracy is essential.
2-Using a stone for cutting or any other machine due to being under an angle and operator error will increase the temperature range in the cutting area and this increase in temperature will cause damage to the top sheet and result in corrosion on the surface.
3- Before assembly, it is better to remove the protective nylons, if any, from the shaped parts such as flushing or others.
4- In order to avoid damage caused by cutting the panels, separate the rolled sections by soft materials such as felt.
In order to prevent damage to the color of the sandwich panels, it is suggested that separate parts of the flashings and panels be cut with the help of a soft tool.
Fasteners for sandwich panel assembly
1- It is recommended to use self-tapping screws to fasten sandwich panels.
2- The type of connector depends on the load and the portable structure and thickness of the sandwich panel.
3- To achieve proper joints on the sandwich panel on the structure, it is very important to prepare the position of the connector in the vertical direction, so achieving this requires precision and appropriate tools.
4- The use of stainless steel fasteners to bind the panel to the structure can be used in the following conditions.
