Steel Structure Installation Process, Steel Structure Installation Points

1, before installation, see the steel structure installation flow chart.

2, Reasonable distinction between construction sections.

3, Determine the steel structure installation procedure.

4, Spell out the steel structure before crane lifting and then lift it into place.

5, installation of running sections, according to the steel structure to repair things within the scope of the plane shape and so on.

6, installation of components vertically from bottom to top.

7, each layer is installed, immediately install the stairs and pressure steel plate.

Two, steel structure installation points

1, friction coefficient

It is specifically for the anti-slip test in the measurement of the initial sliding force, that NF is the friction number of surfaces, is the opposite of f, a kind of high-strength bolts to tighten the pre-tightening force measurement value of the sum.

2, torque coefficient

Which D is the strength of the nominal diameter of the bolt (mm), M is given for the torque value (N.M), then P is the bolt preload. But for 10.9 strength large hexagonal bolts connection, torque coefficient for the average value of K must be in 0.110 to 0.150, and the standard deviation must be less than or equal to 0.010.

3, the initial screwing torque

In order to reduce the bolt tightening process leading to the deformation of the steel plate brought about by the impact of the second tightening we can use the way to reduce the impact of secondary tightening of the bolt between the secondary tightening. The impact of the tightening of the bolts. High-strength bolts for the initial tightening for the initial tightening, but so that the axial force to reach 60% to 80% of the standard axial force.

4, the final screwing torque

High-strength bolts tightening torque for the final tightening torque, must take into account the loss of all kinds of stress, in the torque usually have to be calculated according to the set of pre-tensioning calculation higher than 5% to 10% can be.