4.4.2.4 Hard organic material gaske

4.4.2.4 Hard organic material gaskets shall be provided at the joints of aluminum alloy profiles and steel connectors. 4.4.2.5 Flexible gaskets should be provided at the connection between the column and the beam of the curtain wall. 4.4.2.6 There shall be no less than 2 rivets and bolts in each position. 4.4.2.7 The elevation deviation of the column installation should not be more than 2mm, the front and back deviation of the axis should not be more than 1mm, and the left and right deviation should not be more than 2mm. 4.4.2.8 The horizontal elevation deviation of two adjacent beams should not be greater than 1mm. 4.4.2.9 After the erection is installed, it must be checked once with theodolite or laser. 4.4.2.10 The keel of the curtain wall should form its own lightning protection system, and be reliably connected with the lightning protection system of the square structure, and must comply with the relevant regulations of GB50057-94 "Code for Lightning Protection Design of Buildings". 4.4.2.11 Elevation deviation on the same floor: when the width of a curtain wall is less than or equal to 35 meters, it should not be greater than 3 mm; when the width of a curtain wall is greater than 35 meters, it should not be greater than 5 mm.4.4.2.12 The installation quality of curtain wall keel shall conform to the following table: 4.5 Curtain wall installation process-----Fire protection layer installation process 4.5.1 Process process