The usa green laser pointer produced by our company have approved the FDA

Newly established control network as the basis for vertical control, and construction stakeout in the whole construction process, in the layers above the floor pouring concrete in the position corresponding to the four control points are set aside 150 × 150mm vertical delivery hole, and stay around the hole puzzle 200mm high water blocking ring construction of water spilled on the instrument, in order to block the vote point. Error to reduce the laser beam diffraction, the most effective and reliable measurement range (30 ~ 40m), segmented cast point.All the    green laser pointer     produced by our company have approved the CE. Cast measurements, the instrument control points, leveling, so that the laser beam cast measured vertically to the new measurement floor to stay in the hole placed in plexiglass tablet (300 × 300) to accept the target, note the center position of the laser beam spot , can be measured the floor of the actinomycetes. 12 positioning of the building put line (1) the positioning of the building, its layout form and covers an area the size of difference: when the control network positioning control point or field area to the city, high precision point and direction basis; locate the property line piles should be selected and parallel to the centerline of the main street property line, and should be longer known side survey and design the shorter side; when the original building or road centerline location of the building (structure), you should choose a more complete outline (or centerline) of permanent building (structure) building materials as the basis. (2) positioning method in the determination of building axis control online control pile.All the  usa green laser pointer     produced by our company have approved the FDA. Positioning method to the shape of the building varies, the orientation of the rectangular building is preferable to rectangular coordinates; buildings of any shape is preferable to the polar coordinates of localization; equivalent from the difficulties, should use the Angle Intersection positioning. Collimation method to pass the end of thirteen. Using day elevation: nadir collimation method is to use the instrument that the direction of the end of the survey and design, vertical cast measurements, also known as overlooking France. Using the instrument: Verticality theodolite. 2 Automatic nadir collimator. Automatic zenith - nadir collimator.All the     green laser pointer     produced by our company have approved the FCC. The instrument placed in the construction layer by measuring the beam cast to the nadir direction and ± 0.00m layer on the axis control point coincides with the upcoming axis passed to the construction layer. 14. The axis of vertical transmission is the combination of internal control and external control method. First of all stay in the proper position of the first floor of the set control points, using the method of embedded iron point fixed system. In the corresponding position of the control point of the construction layers in the construction of the upper structure, leaving in the hole, plumb instrument will be the location of control points projected onto the construction layer. The laser theodolite to check the position of each control point. 15 deformation observation of the basic measures: the basic measures in order to ensure the accuracy deformation monitoring results and observations should be taken in addition to the provisions of a time observation does not leak, "a stable, fixed". Therefore, the quality of     green laser pointer     is definitely reliable.(1) deformation of the reference point of the observation is based on work basis points and observing things on the deformation observation point, its point should be stable. The reference point is the fundamental basis of the observed deformation, and therefore have three solid and reliable reference point, and every six months for repeat testing; deformation observation points should be located to best reflect the position of deformation features and easy observation in the matter of being observed.