4.7.2 Process points: Polyethylene

4.7.2 Process points: Polyethylene foam elastic material should be used for curtain wall blocking material; glue should not be used on rainy days; both sides of the seam should be cleaned before gluing, and volatile cleaning agent should be used. After cleaning, the seam should be opened within 1 hour. The glue is over; expired weather-resistant sealant should not be used; there should be no bubbles and obvious unevenness in the glue joint after the glue is finished; the straight line of the glue joint should refer to the keel installation process; the width of the glue joint should meet the design glue joint width; the glue joint width The deviation should not be greater than 2mm; the thickness of the weather-resistant glue joint should be above 3.5mm. 5. Dry-hanging natural stone curtain wall construction 5.1 Process flow: Preparation for entering the site-preparation for baseline laying off-upper wall installation-rod installation-on-site anti-corrosion treatment-concealed acceptance-stone installation and laying off-stone Installation-cleaning and caulking glue-cleaning and acceptance. 5.2 Baseline detection and positioning 5.2.1 The measurement of the grid axis of the curtain wall should be coordinated with the measurement of the main structure, and the error should be adjusted in time and should not be accumulated. 5.2.2 Draw the baseline, check and confirm. According to the datum line, the elevation level and axis datum of the building are clearly marked on the outer wall of the building, a fixed datum point is established, and the theodolite and level gauge are used to separate several axes and the level elevation line of each floor.