1）基层清理：清扫基层浮灰，基层平整度应较平整。

1) cleaning: cleaning dust from the grassroots, grassroots grassroots flatness should be smooth.

（2）弹水平线、垂直线：在每个角量测，从尾檐到被挂板覆盖的最低点的距离。用得到的最长距离值在每个角重新量测未设定弹线的起始点。在这个最低点弹线，用这条线作为起始板条的定位线。在阳角、阴角及门窗边缘距6㎜弹垂直线，控制两侧收口条距离。

(2) a horizontal line, a vertical line: the distance measured at each angle, from the eaves to the lowest point covered by the hanging plate. The starting point of the non set line is measured at each angle by the maximum distance obtained. At this lowest point, the line is used as the location line of the starting strip. From the 6 mm bullet in the vertical line, yin yang angle angle and edge control shut doors and windows, on both sides of the distance.

（3）在起始条、阴阳角角柱、边框、收口条安装完毕，经检查横平竖直后即可安装挂板。

(3) at the beginning, yang angle prism, frame, shut up after installation, check the horizontal and vertical hanging plate can be installed after.