The U-shaped glass curtain wall is welcomed by the owners and the construction designers because it has many characteristics, such as: low heat transfer coefficient, good heat insulation performance, color difference is small, device construction simple and convenient, fire performance is good, save money and environmental protection... And so on.

01.Introduction to U-shaped glass

Building U-shaped glass (also known as trough glass) is the first calendering and shaping method of continuous production out, because its cross-section is“U”-shaped, hence the name. It is a new kind of building profiled glass. There are many kinds of U-shaped glass, which have good characteristics of light transmission and non-perspective, excellent thermal insulation and sound insulation, higher mechanical strength than ordinary flat glass, simple construction, unique architectural and decorative effects, can Save a lot of light metal profiles, a wide range of uses.

Products by our glass quality supervision and inspection center in accordance with the building materials industry standard JC/T867 -2000“U-shaped glass for building” qualified, the technical indicators reference to German industrial standards DIN1249 and 1055 standard formulation.

Products have been listed in February 2011 in Yunnan New Wall Materials Product Catalogue.

02.Scope of application

Can be used in airports, stations, gymnasiums, factories, office buildings, hotels, residential, greenhouses and other industrial and civil buildings non-load-bearing external walls, partitions and roofing.

03.Reference Standards and atlases

Building materials industry standard JC/t 867-2000“U-shaped glass for building”

German industrial standards DIN1055 and DIN1249

Architectural Standard Design Atlas 06J505-1 external decoration (I)

04.Classification of U-shaped glass

According to color classification: colorless, spray color, film color. Commonly used colorless.

Classification by surface state: embossed, smooth, fine pattern. Commonly used embossing patterns.

According to the strength classification: ordinary, toughening, sticking film, strengthening film and filled insulation layer.

05.Architectural design application

As wall material, U-shaped glass can be used in building interior wall, exterior wall, partition and other parts. External walls are generally used in multi-storey buildings, the height of the glass depends on the wind load, the height of glass distance and glass connections. The data of German industrial standards DIN-1249 and DIN-18056 are provided in this special issue (Schedule 1) for the design of multi-storey and high-rise buildings. The node diagram of U-shaped glass exterior wall is specially described in the architectural standard design atlas 06J505-1 external decoration (I) and this special issue.

The U-shaped glass belongs to noncombustible material. The fire resistance limit is 0.75 h (single row, 6mm thick) . If there are special requirements, should be in accordance with the relevant code design or take fire precautions.

U-type glass can be single-layer, double-layer installation, installation can be left vent or no vent slot. This special issue only provides the single-row wing outward (or inside) and double-row wing at the joint in pairs of two combinations, if the use of other combinations should be noted.

06.Installation method

Pre-installation preparation: the contractor must understand the u-glass installation related regulations; familiar with the basic methods of u-glass installation, and operation of short-term training. Sign the“Safety Guarantee Agreement”, written into the“Project contracting contract content”, can enter the construction site.

Installation process planning: before entering the construction site, with the actual development of the“Device process”, and the basic requirements of the device process sent to each operator's hands, requirements and familiar with the operation, when necessary, organize ground training, especially safety operation rules, which no one can violate.

Basic requirements of the installation: special aluminium profiles are usually used. Stainless steel profiles or Ferrous profiles can also be used upon user's request. Excellent corrosion and rust protection treatment is required when metal profiles are used. The border material and the wall surface or the construction hole mouth should have the solid fixed, each extension meter should not less than 2 fixed points.

Installation height calculation: see attached figure (see profile glass installation height table) . U-shaped glass is installed in the four-square box hole in the transparent wall, the length of glass for the height of the box hole reduced by 25-30 mm, width can not consider building modulus, because U-shaped glass can be arbitrarily cut. 0-8m scaffolding. High-rise installation generally using hanging basket method, safe, fast, practical and convenient.

07.Installation process

The aluminum frame material, with stainless steel bolts or rivets fixed to the building. Clean the inside of the U-shaped glass carefully and insert it into the frame.

The stable cushioning plastic parts are cut into corresponding lengths and put into a fixed frame.

When the U-shaped glass is installed to the latter piece, and the width allowance of the hole can not be installed into the whole piece of glass, the U-shaped glass can be cut along the length direction to meet the remaining width. Installation should be cut off the u-glass first into the border, and then according to Article 5 requirements for installation.

After the installation of three U-shaped glass, should first be two glass into the border, and then install a third glass closure.

Adjust the temperature expansion gap between U-shaped glass, especially in the area of large annual temperature difference.

When the height of U-shaped glass is less than 5 m, the permissible deviation of the verticality of the border is 5 mm; when the horizontal width of U-shaped glass is more than 2 m, the permissible deviation of the horizontal component is 3 mm; when the height of U-shaped glass is less than 6 m, the permissible deviation of the horizontal component is 3 mm, the allowable deflection is less than 8mm.

Clean Glass: after a wall is finished, clean the surface left traces.

Insert an elastic strip into the gap between the frame and the glass. The contact surface between the strip and the glass and the frame shall not be less than 12mm.

In the frame and glass, glass and glass, frame and construction of the joints, filled with glass rubber elastic sealing material (or silicone seal) .

The load borne by the frame should be directly transmitted to the building, U-shaped glass walls are non-load-bearing walls can not bear the force.

When installing the glass, the inside surface should be wiped clean. After installation, the dirt on the outside surface should be wiped clean.

08.Transport

Normally, it is transported by car from the factory to the construction site. Due to the characteristics of the construction site, it is difficult to find flat ground and storehouse, but must keep the safety and clean U-shaped glass, it is recommended to take cleaning measures.

09.Uninstall

U-glass factory by the home crane crane loading, the construction party responsible for unloading. In order to avoid the damage caused by unload method, damage packaging, as well as uneven ground and other problems, it is recommended to standardize the unload method.

In the case of wind load, the wind pressure strength of u-glass is usually determined by calculating its maximum service length: l-u-glass to maximum service length, md-u-glass bending stress, the bending modulus of n/mm2WF1-u glass wing (see table 13.2 for details) , cm3P-wind load standard value, the bottom width of KN/m2A-u glass wing, and the bending modulus of M13.2 u glass with different specifications.

The bending modulus of different installation methods should be taken

When the wing faces the direction of force, the bending modulus of the base plate WST is adopted.

The bending modulus of the wing, WF1, is adopted when the bottom plate faces the direction of loading.

When the U-type glass is installed, the integrated bending modulus of the integrated value.

In the cold winter, because the indoor and outdoor temperature difference is larger, the glass toward the indoor side easy condensation water. Under the condition of using single-row and double-row U-shaped glass as building envelope, when the outdoor temperature is lower and the indoor temperature is 20 ° C, the formation of condensate is related to the outdoor temperature and indoor humidity

10.Thermal insulation property

The heat transfer coefficient of double-layer U-shaped glass with different filling materials can reach 2.8 ~ 1.84 w/(m2? K) . In Germany's DIN18032 safety standard, U-shaped glass is classified as safety glass (our relevant standard has not been included in safety glass) , can be used for ball sports venues and roof daylighting. By strength calculation, the safety of U-shaped glass is 4.5 times that of ordinary glass. The strength of U-shaped glass with the same area as plate glass after installation is calculated by the area formula: AMAX = α (0.2t1.6 + 0.8)/Wk, which reflects the relationship between the area of glass and the strength of wind load. The U-shaped glass achieves the strength of the toughened glass equivalent area, while the two-wing sealant bonding constitutes the overall safety of the glass (safety glass in German industrial standard 1249-1055) .

U-shaped glass vertical installation of external walls