Curtain wall safety performance design requirements a recently summarized the main review contents of architectural glass curtain wall and classified them, hoping to provide a little reference for architectural glass curtain wall reviewers and designers of glass curtain wall companies.

1、 Fire protection design requirements of glass curtain wall

The secondary design of glass curtain wall needs to implement the fire protection requirements in the vertical and horizontal directions of glass curtain wall in the architectural construction drawings and the setting requirements of fire rescue windows.

1. Vertical fire protection requirements of glass curtain wall

(1) Vertical fireproof sealing of glass curtain wall

According to the provisions of article 4.0.3 of technical standard for application of building fire blocking (GB / t51410-2020), the fire blocking structure between layers of glass curtain wall shall be set up with two layers, the thickness of each layer shall not be less than 200mm, and the spacing between the two layers shall not be less than 1.20m. When automatic fire extinguishing system is set, it shall not be less than 0.80M.

(2) When the original building replaces the interlayer solid wall with fireproof glass wall, it shall meet the provisions of article 6.2.5 of the building code. The fire resistance integrity of fireproof glass wall of high-rise building shall not be less than 1.00h, and that of fireproof glass wall of multi-storey building shall not be less than 0.50h, The fire resistance integrity shall be measured according to the test method and judgment standard of non thermal insulation glass inlaid components in the current national standard fire resistance test method of glass inlaid components (GB / T 12513). The height of fireproof glass wall shall not be less than 1.20m, and shall not be less than 0.80M when automatic fire extinguishing system is set.

2. Fire protection requirements for horizontal direction of glass curtain wall

When the transparent glass curtain wall is located within the horizontal distance of 2.0m from the nearest edge on both sides of the firewall or within the horizontal distance of 4.0m from the nearest edge on both sides of the corner in the firewall, it shall meet the provisions of articles 6.1.3 and 6.1.4 of the building code. That is, class B fire windows that can be fixed or closed automatically in case of fire shall be set, and their fire resistance, thermal insulation and fire integrity shall not be less than 1.0h, and their fire resistance shall be measured according to the test method and judgment standard of thermal insulation glass inlaid components in the national standard fire resistance test method of glass inlaid components (GB / T 12513).

3. Setting requirements of fire rescue window

The position and size of the fire rescue window in the secondary design and construction drawing of the glass curtain wall shall be consistent with the original building construction drawing, and the net size of the fire rescue window sash shall not be less than 1.0mx1 0m, it should be noted that its glass should be easy to break.

2、 Safety protection requirements for free space of glass curtain wall

The secondary design of the glass curtain wall needs to implement the design requirements of the architectural construction drawings on the safety protective glass breast board at the free space and replacing the low windowsill protective window railing with a fixed leaf.

1. The effective clear height of safety protective glass breast boards at the accessible roof, veranda, terrace, open balcony and other adjacent places shall meet the requirements of the original building construction drawings and relevant regulations and standards. The breast board glass shall meet the provisions of article 7.2.5 of technical code for application of building glass JGJ # 113-2015.

2. When the fixed leaf of glass curtain wall is used to replace the window railing, the following requirements shall be implemented:

(1) The horizontal keel of the glass curtain wall shall be 800mm high from the floor. The size, wall thickness and fixing measures between the glass curtain wall keel and the main body of the building shall be indicated. The calculation sheet reviewed and approved by the structure discipline or the test report meeting the anti-collision requirements of the load code shall be provided.

(2) The fixed fan glass shall meet the provisions of article 7.2.5 of technical code for application of building glass JGJ # 113-2015. The minimum requirement is that a layer of glass of insulating glass shall be 6.38 thick laminated glass (note that the structure of the fixed fan shall meet the energy-saving requirements at the same time).

3、 Design requirements for smoke control and smoke exhaust of glass curtain wall

The secondary design of glass curtain wall needs to implement the smoke control and smoke exhaust requirements of glass curtain wall in architectural construction drawings.

1. Natural ventilation requirements.

For enclosed staircases and smoke proof staircases with natural ventilation, openable external windows with an area of not less than 1.0m2 shall be set at the highest part; When the building height is greater than 10m, openable external windows with a total area of not less than 2.0m2 shall be set every 5 floors on the outer wall of the staircase, and the layout interval shall not be greater than 3 floors; The area of openable external windows in independent front room and fire elevator front room with natural ventilation shall not be less than 2.0m2, and the area of shared front room and shared front room shall not be less than 3.0m2; The refuge floor (room) with natural ventilation shall be equipped with openable external windows in different directions, and its effective area shall not be less than 2% of the ground area of the refuge floor (room), and the area of each direction shall not be less than 2.0m2.

2. Requirements for natural smoke exhaust

Where the ventilation discipline adopts natural smoke exhaust, the effective opening area of the smoke exhaust window within the height range of the smoke storage bin shall meet the requirements of the ventilation discipline, and the effective smoke exhaust area shall be calculated according to article 4.3.5 of the technical standard for building smoke control and smoke exhaust system gb51251-2017. The opening form is detailed in detail (detail I). Note that when the external window is a suspended window, the opening angle of the suspended window shall be indicated in the elevation.

(excerpt) author: Song Yingfang