Bases Fixing Angles For L68A1 Mast

Products Specification

Type , Model: Bases Fixing Angles For L68A1 Mast

Size: 2M

Use for : L66A1, L66A3 ,L 68A1, L68A3, L68B1, L68B2 , L68B3  mast section , P20A  R20A, P21A  R21A  ,2m L type mast

Materials: Q345B

Process: Blasting derusting, 

Painting:  Under painting , Middle painting, Surface painting.

Our factory produce and supply almost all famous brand tower crane :Mast section, Anchor Frame, Fixing angle ,Adaptor and so on as good quality and price.

Bases Fixing Angles For L68A1 Mast

Tower Crane Knowledge sharing：

Three common cases, tower crane measurement method

In the installation of tower crane, we should pay great attention to the relative slant. During construction measurement, the verticality of buildings, structures, construction elevators and tower cranes is often measured.

Bases Fixing Angles For L68A1 Mast

A. for straightness error measurement generally adopts 90 ° square from experience to see light gap to make an estimate, or 90 ° square measure with feeler. The above two measurement methods can only be used for the rough measurement of the verticality.

And adopted the dial indicator with 90 ° square measurement method on the tablet, good results have been achieved. 90 ° square datum using C glyph chuck fixed on the tested pieces, using dial indicator in the 90 ° Angle square measuring surface measurement.

The difference between the maximum and minimum readings is the verticality error of the measured part.

Ii. Conventional methods. If you want to measure the verticality of a building, first set up the theodolite 1.5 times away from the height of the building, aim at the top of the building, use the theodolite to cast down, make a mark,

Bases Fixing Angles For L68A1 Mast

measure its horizontal distance from the bottom, use the inverted mirror projection point method to observe the two measuring back, take the average.

Three, if there are obstacles next to the building, people can not near the bottom of the building, can first aim at the top of the building, cast from the building closer to the flat place, draw a short line, and then the instrument aimed at the bottom of the building, cast in the same place, and then draw a short line.

Bases Fixing Angles For L68A1 Mast

Using the above tower crane measurement method has the advantages of small error, high precision, direct observation of verticality error value, convenience, speed and so on.