How to deal with the gaps in the floor slab and the glass curtain wall

The galvanized steel plate is thick, and the gap between the folding piece and the glass is sealed with fireproof adhesive fireproof rock wool.

The packing is compact, and the filling height is not less than 100 Combined with the structural beam, the fireproof board is hung below.

The fire resistance limit is not less than the total height of the upper counter is not less than meters.

Glass curtain wall. Reflection glass curtainwall) refers to the building envelope or decorative structure composed of supporting structure system and glass, which can have a certain displacement capacity relative to the main structure and do not share the role of the main structure. The walls are available in single and double glazing.

Glass curtain wall is a beautiful and novel method of building wall decoration, which is modernism.

A distinctive feature of the era of tall buildings. In 2013, according to the Fatal Light Awareness Program (FLAP), a volunteer organization for bird conservation, one million to nine million migratory birds die each year in Toronto alone. Glass curtain walls are basically divided into frame support, all-glass curtain wall, point support, and unitized curtain wall.

Generally, the gap between the floor slab and the glass curtain wall needs to be fireproof between the construction layers, and the upper and lower levels are galvanized steel plates, and 100 thick rock wool is sandwiched in the middle.

The lower part of the floor slab can be fireproofed, and the upper part is blocked with 1mm galvanized sheet.

Galvanized iron plate package 100mm thick fireproof rock wool is close to the curtain wall glass, reserved 2-3mm gap, weather-resistant rubber sealing, so as not to damage the thermal expansion and cold shrinkage glass, the upper part can be used as a baseboard for wood, and the outside can be paved with stone or aluminum-plastic panels for decoration.

The purpose of the curtain wall partition is to prevent the upward fire after a disaster, and then the sound insulation. If the curtain wall glass is transparent on the outward side, it can be decorated with fluorocarbon paint on the outside of the galvanized steel sheet.

In the "Quality Inspection Standard for Glass Curtain Wall Engineering" JGJ T 139 2001, six inspection standards are stipulated. The second of these is the "fire inspection". It can be seen that the design and construction of glass curtain wall fire protection occupies a relatively important position in the entire glass curtain wall project.

First of all, the fire protection level of the project should be determined in accordance with the provisions of the national standard "Code for Fire Protection Design of Buildings" GBJ 16, "Code for Fire Protection Design of High-rise Civil Buildings" GB 50045 and "Code for Fire Protection Design of Building Interior Decoration" GB 50222, combined with the specific conditions of the designed project.

Secondly, according to the fireproof grade of the project, determine the material and thickness of the metal plate used in the fireproof structure and what kind of fireproof filling material is selected, calculate the fire resistance limit and the thickness of the fireproof board layer, and then draw the contact diagram and construction drawing of the fireproof board layer according to the actual interval size of the site.

In the process of curtain wall fire protection design, designers are required to have the concept of fire partition in their minds, because in a fire, most of the deaths are due to the suffocation of people by the harmful smoke produced by the fire. Therefore, in the national standard "Code for Fire Protection Design of High-rise Civil Buildings" (GB50045-95), it is stipulated that the gap between the glass curtain wall and each floor and each partition wall should be tightly filled with non-combustible materials, the purpose of which is to prevent smoke from escaping from the gap to other floors or rooms, and the harm will be expanded. During the construction process, each formed a fire interval.

There are no gaps that will smoke out. In addition, it should be noted that the same piece of glass should not span two fireproof areas, which is to avoid glass breakage affecting the fireproof partition effect. It should also be noted that the fireproof board layer should not be directly pushed to the glass of the curtain wall, and generally leave a gap of 3-5mm, and after the fireproof board layer is installed, the gap left by fireproof sealant will be continuously closed to meet the requirements of no air leakage.

The fireproof materials of glass curtain walls should be made of non-combustible or refractory materials such as rock wool, slag wool, glass wool, and fireproof boards. The thickness of the metal plate (taking galvanized steel sheet as an example) on the shelving fireproof material is generally not less than, and the thickness of the fireproof board layer is generally not less than 70mm. The calculated thickness shall prevail, and the steel plate shall be folded into a certain geometric shape according to the plate layer, and the fireproof material shall be fixed in the middle and connected with the structure and the aluminum alloy frame.

A gap of about 10mm should be left between the vertical partition wall and the curtain wall mullion, and the gap should also be filled with fireproof material, and then sealed with fireproof sealant.

According to the requirements of the specification, at least 800mm non-combustible solid skirt wall or fireproof glass skirt wall should be made.

The gap between the glass curtain wall and the outer edge of the floor slab and partition wall should be fireproofed and should meet the following requirements:

1. The upper and lower layers of horizontal fireproof plugging structure should be adopted in the window sill wall. When a layer of fireproof plugging is adopted, the fireproof plugging structure should be located in the lower part of the window sill wall;

2. The horizontal fireproof plugging structure should be reliably connected with the main structure and curtain wall frame by a galvanized steel plate not less than a galvanized steel plate; The joints between the steel plate support structure and the main structure, curtain wall structure components and steel supporting plates should be sealed with fireproof sealant;

3. When rock wool or mineral wool is used for plugging, it should be filled densely, and the filling thickness should not be less than 100mm.

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