Control of 3D Space Coordinate of Steel Space Frame

For steel space frame structure, precision instruments must be used for the spatial positioning of ball joints. Therefore, it is necessary to convert the original coordinates into polar coordinates, and to determine the spatial position of the spherical node by means of point angle ranging and elevation positioning. The theodolite, far-infrared rangefinder, and level can be used to achieve the design accuracy. Numerous data from around the world show that positioning with the center of the dot and mounting from the outer ring inward has more advantages, it can reduce the closure error. According to the hoisting capacity, we divide it into four ring belts from the outside to the center, and adopt flow operation. After the small units are prefabricated on the ground, they are assembled one by one. The small-unit ball nodes on each annular belt are provided with ball bases on the scaffolding. The three-dimensional space coordinates of this base completely correspond to the spherical nodes of the small unit after the measurement. Dimensions and coordinates should be checked and recorded. Due to the flow of water from the outside to the inside, the three-meter positioning method can be realized. The ball base on the scaffold should be made into a form that is easy to adjust, and it should be temporarily fixed after adjustment.

SAFS steel structure entrance

The above is an introduction to the control of the three-dimensional space coordinates of the steel space frame, which can help you understand the space frame structure faster. Of course, you can go to our homepage to see more related content.

How to control the quality of bolted connection construction of steel structure engineering? The high-strength bolt connection project is also one of the most important sub-items of steel structure engineering, and it is also one of the weak links in the current construction quality, mainly in:​

steel structure engineering：https://www.safsteelstructure.com

(l) Some high-strength bolts are shoddy (replace high-strength bolts with ordinary refined bolts);

(2) The surface treatment of high-strength bolts does not meet the requirements of the specification, including surface treatment, leveling and closeness, and quality of bolt holes;

(3) The tightening of high-strength bolts is not carried out according to the specifications. For example, the initial tightening and final tightening are completed at one time, no torque wrench is required, and it is entirely based on subjective estimates.

In order to ensure the construction quality of the high-strength bolted connection project, the supervising engineer must have a high sense of responsibility. While urging contractors to improve quality awareness, strengthen quality management, and implement quality assurance measures, work methods such as side-by-side supervision and parallel inspection are actively adopted. Only in this way can the construction quality of the high-strength bolted connection project be under strict control.

Introduction of four major systems in large-span steel structure engineering buildings

How many systems are there in large-span steel structure engineering buildings? Steel structure engineering is a direct reflection of the current level of construction in the construction industry. Therefore, both in industry and commerce, steel structure engineering has developed rapidly, and steel structure engineering has also attracted much attention. At present, in the field of steel structure engineering, there are mainly four kinds of structural models, the specific categories are as follows.

Image from SAFS Steel Structure Engineering Company.

1. Cold-formed thin-walled steel system. In this system, steel structural members are cold-formed with thin steel sheets into C-shaped and Z-shaped members, which can be used alone or in combination. However, self-tapping screws are used for the connection between components, and the stiffness of the joints is not easy to guarantee. It has poor lateral force resistance and is generally only used in residential buildings or villas with 1-2 floors.

2. The frame system. This kind of steel structure project is set up with steel frame both vertically and horizontally, and the doors and windows can be set flexibly to provide large bays. Therefore, it is widely used in multi-storey steel structure houses.

3. Frame support system. Under this system, steel structure engineering generally has multiple lateral force resistance systems. Beam-column connections and column foot connections can be designed as hinged semi-rigid connections. The construction structure is simple, the foundation mainly bears the axial force, and the size is small.

4. Frame-shear wall system, mainly used in low-rise residential buildings. Currently, it is widely used.

These four steel structure systems also constitute the main structural system of steel structure engineering. It also plays an excellent role in promoting the development of steel structure engineering.