The classification and characteristics of the unit curtain wall
"Wind-load *" can be mainly divided into: "wind-load *" and "half unit curtain wall, also known as" strong unit curtain wall, half wind-load * detailed points and can be divided into: set a shard stacked type curtain wall, window between the wall unit curtain wall.The wind-load * classification is different, but its basic principle.It and frame type curtain wall in the essentially difference is made on the principle of design and construction.Now the characteristics of the unit curtain wall is introduced as follows: One, the unit curtain wall leaking problem, adopted the "principle of constant pressure".Curtain wall leakage phenomenon, must have three conditions, the first is the presence of water, such as rain swab with water curtain wall.Second, the water movement way;Third, water sports, there are six kinds of motivation such as gravity, momentum and surface expansion force, capillarity, flow and pressure difference.Differential pressure is the main cause of most of the curtain wall joint leakage, outside wall of water, whether rain or wash water window into the interior, besides must have a break, or fracture, also must demand outside pressure is larger than the indoor pressure.If the pressure of indoor and outdoor equal, even greater than outdoor pressure, even if there is a break, or fracture, water will not enter inside the wall.General waterproof traditional way is to try to long seams to reduce the possibility of openings, such as in a variety of sealant, strip to contact seam sealing plug.New way of waterproof enter indoor, is the use of stormwater drainage, water diversion into the pressure chamber, such as water outflow wall again.In order to achieve constant pressure, we will maintain open part or all of the joints, but is not a constant pressure chamber ventilation space, he must limit in a range of ventilation space, can effectively generate pressure effect, etc.In order to achieve full pressure effect, such as the pressure inside the "isobaric cavity" must maintain at any time greater than or equal to outside pressure.But we know that the building surface pressure due to the change of wind speed at any time, not permanent, the higher the building is larger, the differential pressure will be obvious.Wind pressure is close to the ground than high wind pressure is small, the facade is the central air pressure than the corner is wind pressure is big, the same root transverse material may end by the positive pressure, the other end of the suction penetration, plus other factors make the design of the pressure effect is more complex.Therefore requires high technology.Principle is the core of the wind-load * unique constant pressure. Second, the unit of unit curtain wall height of floor height, width 1.2 meters to 1.5 meters or so commonly.So the force is simple, can be directly hung on floor embedded parts, convenient installation. Three, unit within the factory processed, can put the glass, aluminum, or other material within the factory assembly in a unit, promote the industrialized building. Unit four, because a whole assembly inside the factory, are easily in the factory for inspection, is beneficial to ensure the quality of diversity as a whole, guarantee the construction quality of curtain wall. Five, the wind-load * direction from under the floor above can installation and civil engineering with synchronous construction, shorten the project cycle. Six, wind-load * all engineering can be made within the floors, during the installation can save tall scaffolding and crane ship. Seven, curtain wall unit installation connection interface structure design can absorb the displacement between the layers and unit deformation, can withstand more mobile buildings, usually for high-rise building and steel structure building special favor. Eight, unit curtain wall design can be used to achieve and maintain double sealing systems. Nine, after installation of the unit curtain wall, between unit and unit parts, because the pin shape cohesion, can not note silicone sealant (some can also note glue, different installation methods varies) Ten, wind-load * box closely arranged in straight seam, easy to form a good external image. Eleven, wind-load * wall embedded object location and installation needs high precision. Twelve, wind-load * need to use high technology, the design principle of the contractor requires a certain design talents and advanced equipment, with the strength of curtain wall companies, only has the ability to build the wind-load *. 13, wind-load * requires high technical composition, the shape of the aluminum is more complex, with aluminum amount more.Is slightly higher than the plastic frame curtain wall.(never multiplied above frame type curtain wall). 14 unit curtain wall and frame type curtain, advantages and disadvantages is relatively in the following table.This is not absolute, comparing all kinds of curtain wall, all in accordance with the specific practical cases.