Steel structure installation technology and safety points

In recent years, the gradual improvement of national steel production, the characteristics of steel structure buildings and the abundance of steel raw materials have made steel structure technology develop rapidly. Especially in such an emerging province, the steel structure industry has been vigorously developed. A large number of steel structure workshops, long-span steel structure workshops and high-rise buildings have been built, and steel structure buildings are characterized by simple construction, short construction period, long service life, and low carbon and environmental protection. But the installation of steel structure buildings does determine the key to the success or failure of a project. Today, Xirong Steel Structure uses 16 years of steel structure installation experience to tell you the key points of steel structure installation technology and safety precautions.

Technical points of steel structure installation

1. Positioning measurement

According to the design drawings and construction drawing data, the horizontal elevation, axis and column spacing of the foundation are retested. The cross-line of the vertical and horizontal axes is marked on the top surface of the foundation as the positioning reference for the installation column.

2. Column installation

In order to eliminate the influence of errors in the manufacture of column length on the column elevation, before hoisting, 1m from the upper plane of the corbel should be measured downward as the section of the theoretical elevation, and obvious marks should be marked as a reference for adjusting the column elevation. On the upper surface of the column base, the cross-line of the vertical and horizontal axes through the center of the column is marked as a reference for the positioning of the column installation. When installing, the column coincides with the cross line on the foundation, first use the level to correct the elevation of the column based on the mark at the theoretical elevation on the column, and then use the pad pad to tighten the anchor screws.

Finally, the verticality of the column is corrected from the direction of the two axes with a theodolite and the bolt is tightened with a double nut after the requirements are met. For single columns with unstable structures, temporary protective measures can be taken with the help of wind cables. For columns designed with inter-column supports, the structural stability can be enhanced by installing inter-column supports.

3. Roof beam installation

The roof beam should be inspected before the ground assembly, and when the component deformation does not exceed the limit, the high-strength bolt connection friction surface is free of sediment and other debris, and the friction surface is confirmed to be flat and dry, it can be assembled on the ground. When assembling, oil-free sleepers are used to pad the components, and the two sides of the components are supported by wooden bars to enhance stability. The assembly of the roof beam of the steel structure house is between the two columns as a unit, and the unit should be inspected after splicing:

(1) The straightness of the beam;

(2) The spacing size of the bolt hole connected to other components (such as columns). After adjusting the inspection to meet the requirements, tighten the high-strength bolts.

4. Crane beam installation

Before the crane beam is installed, it should be inspected, and it can only be installed when the deformation does not exceed the limit. After the crane beam single piece is hoisted in place, it should be connected with the corbel with bolts in time, and the connecting plate between the upper edge of the beam and the column should be connected, adjusted with a level and Jingweiyi, and the bolt should be tightened after meeting the requirements.

5. Accessory installation

Finally, the installation of

building accessories, the installation of roof purlins and wall purlins is carried out simultaneously. Before the installation of the purlin, check the deformation of the component, and remove the oil, sediment, etc. on the surface of the component if there is an overrun. Several purlins are hoisted together as a group, and after the installation of one span, check the slope of the purlins. The straightness of the purlins is required to be controlled within the allowable deviation, otherwise the connecting bolts (plus pads if necessary) are used to adjust.

Key points of safety management of steel structure installation

The engineering installation of steel mechanism is outdoor work based on high-altitude work, and the safety risk of personnel is greater. In recent years, both countries and enterprises have put safety as a top priority. Safely completing the project installation and achieving zero harm to on-site personnel is the most basic goal of our Xirong steel structure in every steel structure project and steel structure project.

Key points of personnel safety protection for steel structure installation:

First, the lifting equipment has a full-time driver and command

The crane is a necessary lifting equipment for the installation of steel structure. When hoisting, the crane should have a special personnel command, so that within the line of sight of the crane driver, the whole process of hoisting can be seen clearly;

The lifting command gesture should be accurate, and the driver should follow the command.

A

cordon is set up in the hoisting area, and non-staff are strictly prohibited from entering to avoid injuries to personnel caused by components in the lifting.

Second, prevent electric shock

On-site construction electricity should be protected by one machine, one box, one gate, and one leakage. Set up standing doors, locks, and number management on the electrical box. The on-site construction power supply should also be arranged according to the general plan of the construction site, and the main power box should be connected according to the area. Arrange full-time personnel to inspect the construction site before commuting to work to eliminate potential safety hazards. Full-time personnel shall hold a work permit, and shall not arbitrarily arrange unlicensed personnel to manage electricity consumption. When the cable crosses the construction site, heightening measures should be taken to avoid damage to the cable on the ground or immersion in a puddle and causing leakage.

3. Avoid falling objects

When high-altitude construction requires the use of wrenches, pistol drills and other tools, it is strictly forbidden for construction personnel to throw tools and materials downward at high altitude to prevent injury to people; Cross-construction is strictly prohibited. In the area of high-altitude operation, a warning line is set up on the ground, safety warning signs are set up to pay attention to falling objects at height, and special personnel are arranged to patrol at the same time.

4. Prevent fire and explosion

On-site construction should be equipped with fire extinguishers, and professionals should be assigned to supervise them. Set up a spark hopper and close the lower area during high-altitude welding and cutting to prevent the molten beads from splashing out and injuring people. When the acetylene and oxygen cylinders need to be handled, do not throw, do not fall violently, avoid sun exposure, avoid contact with fire sources, etc. Fire fighting equipment, tools, set up special fire personnel, so that problems can be found in time and dealt with in time.

The quality and safety of a

building runs through every step of its life, and likewise, quality and safety run through every minute and second of a construction enterprise, so do not ignore these basic technical points, let alone underestimate these most basic safety management regulations. Sometimes the most basic is the most useful, now the domestic steel structure industry situation is very good, I hope that all colleagues can develop and grow rapidly, the pace is more stable, our steel structure development and growth, let us go further, let us walk more steadily!