When the length of the single-sided slope is less than […]
When the length of the single-sided slope is less than 12m, the roof may not be provided with a transverse seam; when the length of the single-sided slope is greater than 12m, a transverse seam overlap shall be set between the color steel plates. The horizontal seam is generally overlapped by water. To ensure the waterproof effect, a certain overlap length must be met, and the length of the overlap length is related to the roof slope. When the slope is less than or equal to 1/10, it should not be less than 300mm; when the slope is greater than 1 / At 10 o'clock, generally it should not be less than 200mm, and it is required that the height of the overlap is staggered, and a waterproof sealing tape is pasted between the upper and lower layers. This can not only effectively prevent water seepage, but also prevent oxidative corrosion at the cut of the steel plate. At the same time, it should be noted that the overlap is generally fixed at the crest position with self-tapping screws. If it is set on the trough, reliable waterproof measures must be taken.
The roofing low wave color steel plate is directly connected to the purlin with a connector, one for each wave or every other wave, but a connector must be provided at the overlapping wave. The roof high wave color steel plate is connected with the fixing bracket with a connection member, one for each wave. Another method of connecting the upper and lower plates is the pressing method of pressing plates. On the top and bottom of the two color steel plates, a galvanized steel plate with the same type as the color steel plate is provided. A waterproof sealing strip is provided between the two plates, and it is fastened with fastening bolts. Tightly squeeze together. In order to avoid water leakage caused by the long overlap of the plate, the profiled plate production equipment can also be transported to the site for installation. The entire roof panel from the ridge to the cornice is rolled and installed while rolling. No long overlap is needed to avoid Unnecessary leaks. Generally, it is best to choose long boards without overlapping, but in actual engineering, it is found that when the board is too long, the expansion of the screw holes will be caused by the expansion and contraction of the temperature and the leakage will occur; Coatings are easily damaged during transportation, transportation or construction, affecting quality.