A.Installation of supports between columns of light steel plant without crane system without considering earthquake:
For the general light steel workshop without a crane system, only one layer of inter-column support can be set. If the workshop is too high, resulting in too small inter-column support Angle, it shall be set in layers.
a.Functions of inter-column support:
To ensure the overall stability and longitudinal stiffness of the workshop framework;
The lateral support of the column determines the calculated length of the column outside the plane of the frame; Bear the vertical-horizontal load from the plant, mainly wind load.
b.Principles of supporting arrangement between columns:
The distance between pillars is suitable for 30-45 meters when there is no crane; Inter-column support may be provided between the first column at the end of the plant.
c.Forms of inter-column support:
In general, steel structural systems are designed to take advantage of tensile steel, followed by crushing resistance (axial buckling), and then bending. Therefore, for general light steel plant with no crane, the column coming supported only by the gables under wind load, the load is small, and light steel structure workshop wall retaining structure is pressed steel plate with insulation material, more pillars of plant displacement limit put very wide, is the most widely used so cross with the tensioning device, such as flower basket bolt round steel, small cross-section at this time, the component is smaller and lighter, also save material. Of course, the disadvantage of using a round steel support is that the tensioning device is easy to relax. If the end thread is furred after tensioning (or double nuts, recommended), the relaxation of the round steel can be reduced to a certain extent.
B.Installation of supports between the columns of the plant with a crane system without considering the effect of the earthquake.
For the workshop with the crane system, it is generally necessary to set up the support between the upper column and the lower column (the upper column supports and the lower column supports), and the crane beam can replace the rigid tie bar (if only one floor is set, the longitudinal braking force of the crane outside the plane will act on the middle column, which is not good for the steel column itself).
a.Function and layout principle of upper column support -- the support above crane beam transmits longitudinal wind force from transverse support of roof truss (upper and lower chord) and ensures the overall stability and longitudinal stiffness of the workshop. Arrangement principle: the two ends of the temperature section and the open space with lower column support.
b.The function and arrangement principle of the lower column support -- the support below the crane beam.
1) To ensure the space stiffness of the workshop;
2) Transmission of gable wind;
3) Transfer the longitudinal braking force of the crane.
Layout principle: when there is a crane, it should be set in the middle of the temperature section, or when the temperature section is long (L > 90m), it should be set at three points, and the spacing should not be more than 60 meters. Note that the end of the temperature section is not suitable for the rigid support of the lower column.
c.Forms of inter-column support:
2.3.1 Upper column support: The tensioned cross round steel is usually used as the support; For the heavy-duty work system of the crane in the workshop, the upper column is supported by round steel, which is easy to relax, even with basket bolts, it is difficult to ensure; Moreover, the weight of the crane will have a certain influence on the calculation of the seismic load of the upper column, so it is better to adopt the common single Angle steel cross support.
2.3.2 Lower column support (rigid support): The lower column support generally adopts the cross single-piece support (a T-shaped section consisting of a single Angle or two angles); For lifting weight greater than 16 tons workshop appropriate uses double support (unequal Angle used to the long side connected to the column flange, with the additional tie between two pieces of support is linked together, also can be two-channel steel, H section steel, steel tube) composed of lattice-type steel such as cross rigid support (cross-section size is determined by the support under in-plane loading).