Key points for seismic design of high-rise steel structures
Steel structure projects typically have a shorter construction period compared to reinforced concrete projects. A significant portion of steel fabrication is done in factory workshops, which helps speed up the overall project timeline. In recent years, many manufacturers in China have entered the steel structure processing industry, but only a few possess genuine technical capabilities and can handle large-scale or complex projects. Most of these qualified manufacturers are concentrated in southern provinces and cities.
The quality of steel components produced in the factory directly affects the on-site installation and the structural safety and stability of the entire building. Therefore, it is crucial to have a qualified supervising engineer stationed at the factory to oversee the entire production process. This supervision plays an essential role in ensuring the success of the project and must be an integral part of the construction management plan.
Supervision work primarily focuses on three key areas:
1. Selecting high-quality manufacturers for steel component production. The evaluation should include the following aspects:
- Enterprise qualification level
- Business management model
- Production capacity of the company, including:
- Level of advanced processing equipment
- Quality of technical staff and skilled workers
- Previous experience with similar projects
- Ability to perform detailed design work
- Annual production capacity (in tons) and the ratio of the current project’s volume to that capacity
- If the manufacturer is far from the construction site, the logistics and temporary storage of materials during transportation should also be considered.
2. Developing an effective and feasible supervision plan. This plan serves as a guiding document for the entire project and should cover the following key areas:
- Review of bidding documents, processing contracts, and design specifications
- Relevant technical standards and regulations
- Scope of supervision: covering all stages from manufacturing, pre-assembly, packaging, to transportation
- Supervision objectives: clearly define and implement quality, schedule, and cost control goals
- Supervision procedures and measures: include a flowchart of the supervision process, along with pre-, during, and post-control measures
Key points to focus on during the supervision process include:
- Qualification review of personnel involved in the production
- Inspection of major processing equipment
- Assessment of process assurance measures
- On-site supervision during welding process evaluation
- Ultrasonic testing of full-penetration first and second welds
- Testing of stud welding
- Inspection of high-strength bolt installation
- Monitoring of component assembly at the factory
This content has been compiled based on common challenges faced by professionals in the field. It is intended for reference purposes only. If you find any inaccuracies or have further questions, feel free to reach out and discuss for clarification and improvement.
Stainless Steel One-piece Ball Valve
WENZHOU FOREVER CLASSIC TECHNOLOGY CO.,LTD , https://www.fosicvalve.com