The measurement door is a field measurement of the width, height, thickness, and special circumstances of the door opening that needs to be installed, in order to confirm the actual size of the required door, which is called the measurement door (pay attention to adding or subtracting dimensions according to the floor height, and pay attention to plastering the width).

在测量门洞的宽度和高度的时候需要对门洞的上、中、下三处进行测量，如果不一致，以Z窄处为准，但误差不得超过20mm。如果误差超过20mm需要及时进行修正。

When measuring the width and height of the door opening, it is necessary to measure the upper, middle, and lower parts of the door opening. If there is any inconsistency, the narrow part of Z shall prevail, but the error shall not exceed 20mm. If the error exceeds 20mm, it needs to be corrected in a timely manner.

客户和施工负责人必须在现场；水电改造及墙体改造必须完工；水平线具备，厨卫墙、地砖需要铺好，铺地板的房间需要地面找平做好。墙、地砖、地板的高度要确定；确定平墙是否要增加墙垛。

Customers and construction managers must be present on site; Water and electricity renovation and wall renovation must be completed; Horizontal lines are in place, kitchen and bathroom walls and floor tiles need to be laid, and rooms with flooring need to be leveled and done well. The height of walls, floor tiles, and floors should be determined; Determine whether to add wall piers to the flat wall.

门洞墙体的厚度也是一样的测试方法，但是数据是取Z大值，并且误超不差过5mm。当门上有突出的梁时，上面的线不能安装。

The thickness of the door opening wall is also tested using the same method, but the data is taken as the maximum Z value, and the error is no more than 5mm. When there is a protruding beam on the door, the line above cannot be installed.