1, the aluminum alloy materials used for the open window, according to the standard technology and structural safety requirements of the curtain wall industry, a complete set of open window frame and window sash should be used as a unit structure of assembling the corner code in the factory. When the practical project looks at the problem, the open border of some projects is often seen. The production process is adopted, but the four sides of the material on the border are transported to the site of the project as bulk material. As a result, the angles of the open frame are often misplaced, leaked (Tong Ming), and changes in the internal diameter of the frame, such as changes in the combination scale between the open window and the frame, the change of the open related stainless steel hardware, the change of the closed lock gap and the fixing of the gap. Changes in the method and so on, this series of changes may form the whole window sash falling.
2, the curtain wall open window open hardware, generally selected open hardware has two parts, first is the open bearing function of stainless steel hinge structure, followed by a safe and closed function of the lock structure, the two parts of the structure if one part of the purchase is not appropriate, it will be determined that the open window fan structure has problems。
Material selection: stainless steel hinge should be a stainless steel material, if the material is not carefully checked, perhaps the material is true stainless steel raw material, hinges structure is defective (not carefully seen in the crack), will lead to the project life cycle hinges corrosion, cracks gradually manifest and so on;
Safety: open window lock point should be a multi point structure (at least 2 points), some projects to today still choose the most common single point structure (commonly known as seven words), the raw material of this structure is basically used die casting aluminum, this material structure as long as a single claw, often happens because of the external force. The use of the equipment is not perfect and the safety function of falling and losing is formed; and even the hinge suspension structure of some projects is selected in the open method. The material of this structure is basically used to die casting aluminum. The breakage of pages can all cause the fall of open window sashes.
3. When the curtain wall of a project opens open, we may notice today that there is no board at the bottom of the open window fan. This problem is not supposed to occur. From the day of the release of the technical specification for glass curtain Engineering in China, the stern requirements should be set up on the day of JGJ102. There is not much to say here, but of course some of the open window glasses have a plate structure, but the length of the bracket has not dragged the most outside glass. It is still the state that the glass structure of this open fan is always in a state of insecurity and may fall at any time.
4, some glass curtain wall projects, in the tender process from the staff of the staff and the construction unit, the construction drawing deepened, all of which have selected the safety measures to set up the edge of the open fan glass, but because the structure is not considered and the experience of the production of the workshop is short of practice, the security seal structure can not complete the real safety. The structural sealant of the insulating glass itself is bonded to the aluminum alloy, and the structure is not in the same plane. The resulting glass will be in danger of falling.
5, some project effect map is really very beautiful, alone from the appearance is not able to see the existence of safety danger, when the construction process drawing open a look, the whole project glass curtain wall is not only fixed glass structure, open window glass also selected size piece structure, about this structure, at any time may be sent。 The danger of falling glass。
6. Some projects may not know how to deal with the structural safety of the open window fan, and the glass plate is directly attached to the open fan frame of the aluminum alloy without thinking. The material is not the device, and can not satisfy the long time weather sealing function, that is to say that because of bad consideration caused by not light safety problems, even the utility will be affected.