Manufacturing and installation of single storey steel building workshop

Manufacture and transportation of steel building workshop components

The accuracy of the manufacturing specifications for steel structural components is the basis and premise to ensure the accuracy of all structural specifications of the single storey steel building workshop and the smooth flow of equipment. Therefore, it is necessary to accurately grasp the straightness and distortion of the square steel column, the distance between the connecting hole of the column and the beam and the bottom plate of the column, the machining accuracy of the connecting hole itself, the straightness of the roof beam and the machining accuracy of the column and beam connecting plate, the beam, column The orientation specification of the upper tie rod or the support connecting plate relative to the beam, the orientation specification of the purlin plate, etc.

At present, the central column of the steel structure workshop is made of outsourced H-beam processing or plate assembly. Assuming off-the-shelf H-beam machining, the manufacturing precision of the column is simply controlled. Assuming that it is assembled from sheets, the steel column should be carefully shaped after assembly and welding to ensure the straightness of the steel column and prevent misunderstanding.

Roof beams are mostly herringbone structures, generally assembled from 2 or 4 beams. Roof beams are generally assembled by manufacturers with plates, and the webs of beams are generally irregular quadrilaterals. Manufacturers with strong technology can accurately grasp the lofting and blanking of webs, while manufacturers with weak technology sometimes make mistakes in the lofting specifications of webs. Because the shape and specification of roof beams are related to the tightness of the connection between the beam and the column, the specification of the web directly affects the shape and specification of the beam, so it is particularly important. In the scheme of a general single storey steel building workshop, the roof beam has a certain degree of camber, which is intended to offset the effect of itself and the roof load after all the equipment, so it just meets the equipment specification. The vault height is chosen by the scheme.

In order to ensure the camber, the shape and specifications of the top beam need to be adjusted to a certain extent. In this respect, beams are much more difficult to manufacture than columns. During the on-site inspection, we take the beam shape and specification and the connecting plate at the beam end as the key inspection items, in order to ensure the overall function of the equipment and the tightness between the beam and the column. In the early years we found a wedge-shaped void between the rear beam and column of the equipment. At this time, the large hexagon head bolt has lost the primary role proposed in the original plan, and only assumed the supporting role. There is no friction between beams and columns. To eliminate this danger, we added shear walls to each column near the underside of the beam connection plate to advance support for the roof system. Practice has proved that the effect is good.

In order to prevent and reduce the deformation of connecting parts such as columns, beams, and tie rods during transportation. When the transportation company binds the components, it is necessary to add more support points in the entire length range, and each part should be raised with wooden boards as much as possible, and the peripheral binding should be firm, so as to minimize the damage caused by the swing or heavy pressure of the components during transportation. deformed. A two-point crane should be used during loading and unloading. If the component is too long, you can choose a pole and increase the lifting point appropriately. When the components are stacked on the equipment site, try to reduce the number of stacking layers, generally no more than 3 layers, and the supporting points should be properly added together, so that the single storey steel building workshop company can prevent the components from being deformed under compression.

Installation of steel building workshop components

All preparatory work should be done before installation of single storey steel building workshop components. For example, before hoisting, the equipment personnel must re-measure the components, and the hoisting can be adjusted only on the premise that the components are not deformed and the equipment specifications are accurate. In addition, under the premise of confirming that the strength of the concrete at the root reaches the specification, the equipment personnel should also check the embedded bolts at the root of the steel column. If it is found that there is a problem with the orientation and elevation specifications of the root, this part needs to be recorded so that the orientation of the steel column can be adjusted.

High-strength bolts should be tightened first. During the tightening process, the axis of the steel column should follow dynamically. If the axis changes more than the allowable value, it should be adjusted immediately. All tightening processes from beam-column joints to bracing and tie-rod joints should be performed, and a symmetrical approach should be used at both ends of the same member to reduce single-sided cumulative failures. This adjustment guarantees the precision of the steel column equipment. It is assumed that in this process, if it is found that the equipment parts do not match, the equipment parts cannot be adjusted, but the equipment parts are adjusted or other compensation methods are adopted. For example, if the steel beam and the steel column do not match, the steel column cannot be adjusted, only the steel beam can be adjusted. In all bent frame equipment processes, the accuracy of steel column equipment is a necessary condition for the accuracy of all other equipment.

During the installation and construction of the steel structure workshop, some independent bents should form a stable structure as soon as possible. After the above measures are taken, several other components can be separated from the equipment in turn, so that all the workshops have a stable long-distance bending structure, so that the cumulative failures that occur when all the workshops and equipment are completed can be reduced to a certain extent, preventing existing The steel components of the equipment are deformed, dropped or even overturned due to the influence of natural conditions.