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Bearing Structures

August 12, 2017 18:07

Metal pillars - strengthening the building of competent

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Installation of metal columns - are

process of metallic columns mount technology does not differ from the installation of such structures in reinforced concrete.Metal columns generally establish as a whole, and more cumbersome assembled from individual elements, parts used for welding seam of metal columns equal in strength.Such compounds provide equal and seam strength of the base metal.With the combination of their butt in a extensibility.

Installation of metal columns consists of a series of operations:

  1. capture;
  2. rise;
  3. string leads on the base or butt;
  4. reconciliation;
  5. consolidation.

used for lifting columns slinging metal or semi-automatic capture devices.To prevent slipping belts when moving between the cables and lay the wood casing liner or loose in two lengths of steel pipes.

metal columns - procedures and methods

mounting Before starting the lifting column is attached to a removable ladder - to remove the sling.Lifting is done by rotating or sliding.The most time-consuming activities are considered short-term reconciliation and consolidate the pillars.The process of their implementation depends on the design features of the base metal columns and a complete interface with the substrate.

When designing metal structures shall be required calculation of metallic columns, ie Central compressed element, which is the given design.To do this, divide the value of the design load on the design resistance of the material of construction of the column.At the moment there are three ways installation:

  1. on metal pads , whose thickness is between 40 and 50 mm, and they are installed between the base of the column and the top slice of the foundation.After installation and fastening of the anchor remaining gap is filled with grout.
  2. Top foundation that was built exactly on the project around the base of the column without cement pouring.When using this type of installation, the value of the surface deviation from the foundation projected to be less than 5 mm, and the base plate sole should be treated in the mill factory.
  3. to establish and podlitye solution plate design base.

Installation of metal columns - the nuances of installation

The first method requires a lot of effort and, moreover, inaccurate.The main drawback of the second method is the complexity of the surface of the foundation with sufficient accuracy.

considered the best method of installation of large pipes, called bezvyverochnogo installation.Its essence lies in the fact that the foundation for the metal column (not adjusted to project marks) solution is mounted on the base plate for the four columns.All of them are installed on axes or vyverochnyh bolts.

If necessary, the docking of the column in the vertical plane of the upper part of the butt lift and suggest a scaffolding, which are fixed to the lower column segment.Installation of metal columns is carried out using surveying instruments and pitches.Deviations should not exceed the design tolerances.

Metallic column, whose height does not exceed 15 m, with narrow support shoes, fastened to the foundation with the help of two or four anchors.Strengthening of metallic columns is recommended after installation design with the obligatory installation of ties and beams.There are also strengthening their time constraints.

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