Key points for seismic design of high-rise steel structures
Steel structure projects typically have a shorter construction period compared to reinforced concrete projects. Most steel components are fabricated in factories, often taking more than one hour per unit. In recent years, the number of steel fabrication manufacturers in China has increased significantly. However, only a few of them possess real technical expertise and the capability to handle large-scale or complex steel projects. These qualified manufacturers are mainly located in southern provinces and cities. The quality of steel components produced in the factory is crucial for on-site installation and the overall structural safety and stability. Therefore, it's essential to have a qualified supervising engineer stationed at the factory to oversee the entire production process. This supervision is an indispensable part of the project management.
The main focus of the supervision work includes three key areas:
1. Selecting reliable manufacturers for steel component production. This involves evaluating the following aspects:
- 1.1. The company’s qualification level and certifications.
- 1.2. The company’s business management model and operational efficiency.
- 1.3. The company’s processing capacity, including:
- • The level of advanced manufacturing equipment available.
- • The experience and skill level of technical personnel and skilled workers.
- • Past performance in completing similar projects.
- • The company’s ability to perform detailed design work.
- • Annual production capacity (in tons) and the proportion of the current project relative to that capacity.
- 1.4. If the manufacturer is far from the construction site, the logistics and temporary storage of materials during transportation should be considered carefully.
2. Developing an effective and practical supervision plan. This plan serves as a guiding document for the entire supervision and construction process. It should include the following key elements:
- • Review of bidding documents, processing contracts, and design specifications.
- • Reference to relevant technical standards and industry regulations.
- • Scope of supervision covering all stages: manufacturing, pre-assembly, packaging, and transportation.
- • Clear objectives for quality, schedule, and cost control.
- • Detailed procedures and measures, including pre-, during, and post-control phases.
- • Key supervision points such as personnel qualifications, inspection of main equipment, review of processing methods, on-site supervision of welding processes, ultrasonic testing of welds, stud welding checks, high-strength bolt inspections, and monitoring of component assembly at the factory.
This content is based on common issues encountered by professionals in the field. It is intended for reference only. If you find any inaccuracies or need further clarification, feel free to reach out and discuss. Your feedback is always appreciated.
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