After the steel building projects complete the installation, to better extend the steel structure building's service life, it is necessary…
As a new type of building form, steel structure building has simple force, clear force transmission path, and fast construction. It is widely used in industrial, commercial, and public facilities and other buildings. In this article, we want to share the precautions for steel structure installation.
Steel structure installation for column foot
During the column foot installation, there may be a problem that the bolt cannot be tightened due to the insufficient thread length of the anchor bolt. To prevent such problems, the top of the anchor bolt’s elevation must be reviewed during construction, and the thread length must be sufficient.
For the column foot with a shear key at the bottom of the column, it is necessary to reserve the shear groove according to the size during construction, and there should be no debris such as stones in the shear groove.
Steel beam segment
The reasonable span of the portal steel frame is about 24-30m, and the steel beam within the reasonable span should not be segmented into more than four sections. Suppose the original design does not consider the convenience of site construction. In that case, the steel beam is divided into six sections when the design is made, and the structural engineer can carry out the verification review according to four sections. The review can greatly reduce the site workload if it is passed.
Precautions for splicing bolts
The number of bolts in the beam-column and beam-beam splicing joints is often relatively large, and there is a stiffening plate near the bolts. The bolt space should be reviewed in advance during construction to ensure that the electric torque wrench is smoothly tightened.
Pipe Strut Installation
The bolts connecting the pipe strut and the beam and column should not be in the beam and column’s flange. Otherwise, it is not easy to construct; besides, the pipe strut on top of the column top with a gutter often needs to be moved to the outside to ensure that the downpipe can fall smoothly.
Gutters are an important part of preventing water leakage in the steel building. Before the fabrication of the steel structure, the engineer should verify the purlin’s height to meet the gutter’s depth requirements and whether the gutter’s height meets the drainage requirements for the middle gutter. Besides, consideration should be given to the need for gutter brackets to consider the gutter thickness and drainage.
Steel structure installation for crane beam
When installing the crane beam, in addition to paying attention to whether the net distance between the top of the crane and the roof beam has enough space, it should also be noted that there is a column bracing bay. The bolts at the beam-column connection nodes should be high-strength bolts or ordinary bolts, and there is no column bracing in the bay; the bolts adopt ordinary bolts.
Column brace installation
For the column brace composed of angle steel, when installing a short brace, to ensure a smooth installation, the angle steel strips near the connecting plate of the brace should be welded on-site after installation; the connection plate in connecting the bracing to the steel column should also be moved outward by 2mm each.
Steel structure installation for Purlin
There are often a large number of wall girts and roof purlins in portal rigid frames. To minimize component numbers and reduce construction difficulty, all the holes for sag rod, flange bracing should be set and unified.
The installation of door and window openings
In the construction drawing review stage, in addition to checking whether the structure is consistent with the positions of the doors and windows, reserved openings, gutters, and cornices in the building drawings, it is also necessary to check whether the door openings conflict with the column bracing; besides, the sag rod should not go deep Into the door and window opening.
Steel structure installation for Ladder
As an important subsidiary structure of the steel structure building, the maintenance ladder must consider the starting height, landing height, and the connection with the roof purlin. Since the ladder has a thin cross-section and is easy to deform, the workers must pay special attention to the ladder’s protection before installation.