1. For buildings with six floors or more, in the main construction stage, floor control points should be measured from the bottom control points through reserved holes every three floors, and the verticality of the main structure should be measured. The maximum distance between control points should not be greater than 30m, and the rectangle connected with control points should be closed.

2. Each floor should pop up the axis, measure the elevation once, and carry out the upper construction accordingly, and strictly control the elevation of the upper concrete floor.

3. During masonry construction, several skin poles must be set to control the elevation. Before laying, the elevation of each floor should be measured once. If there is any height difference, sand oars or fine stone concrete shall be used for leveling.

4. Formwork shall be installed in strict accordance with the design axis position and geometric dimensions of walls and columns. Restriction of welding steel parts first for wall and column formwork, that is, the steel bar head is spot-welded on the outside of the longitudinal reinforcement of the wall and column protruding from the floor according to the elastic line position to control the geometric size of the wall and column formwork.

5. In the decoration stage, the pop-up elevation and axis control line should be strictly constructed, and ash cake, standard reinforcement and corner protector should be made. The thickness of plastering layer should meet the design requirements.

6. According to the inspection lot, measure the indoor elevation, axis and verticality of the building. Indoor elevation, axis and perpendicularity shall be spot-checked according to each inspection lot 10% room, and there shall be no less than 5 rooms, and the measurement records shall be filled in carefully.

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