Multi Span Primary Steel Framing Structural System Designed For Large Area Buildings

Product Description
A Multi-Span Primary Steel Frame is a scalable and efficient structural system designed for buildings requiring extended floor areas (2-10 spans), integrating modular rigid connections, uniform load distribution, and architectural adaptability. Manufactured with Q355B/Q460 high-strength steel (beams, columns, and purlins) and 10.9-grade high-strength bolts, this product features a series of interconnected single-span rigid frames (span per unit: 12m-30m) linked by tie beams and cross bracing, forming a continuous structural system that distributes vertical and lateral loads evenly across all spans. The main beams adopt I-shaped or box-section cross-sections (300×150mm to 800×300mm) with yield strength ≥345MPa, while columns use H-beam or box-section profiles (250×250mm to 600×300mm) to resist multi-directional forces, limiting vertical deflection to ≤L/500 (L=single span length) and lateral displacement to ≤H/600 (H=frame height). Key features include standardized modular design for easy expansion (adding spans without modifying existing structures), rigid joints between beams and columns for enhanced overall stability, and factory prefabrication rate ≥92% (dimension error ≤±1mm) to reduce on-site construction time by 45%. The surface is treated with hot-dip galvanizing or epoxy paint, providing salt spray resistance ≥1000 hours and adapting to indoor, outdoor, and industrial environments. It complies with GB 50017-2017 and EN 1993 structural standards, supporting customization of span number (2-10), single span size (12m-30m), and column spacing (6m-12m) to match diverse project layouts. Professional services include BIM-based modular optimization, load distribution analysis, on-site installation training, and quality inspection, ensuring the frame balances structural efficiency, scalability, and cost-effectiveness.

Applications
Multi-Span Primary Steel Frames are versatile structural solutions ideal for large-area buildings requiring flexible layout and expansion, widely used in industrial, agricultural, and commercial projects. Certified by GB 50017-2017, EN 1993, and ISO 9001, they meet strict structural safety standards. Typical applications include industrial complexes (multi-span workshops, production lines with different functional zones), large warehouses and logistics parks (span 15m-25m per unit), agricultural facilities (multi-span greenhouses, grain storage barns), commercial buildings (supermarkets, shopping malls with extended floor areas), and public buildings (schools, hospitals with interconnected functional areas). They are particularly suitable for projects with phased construction (e.g., warehouse expansion) or diverse functional requirements (e.g., workshops combining production and storage). The minimum order quantity is 1 set (customized per project), with full tailoring based on span number, single span size, and load conditions. Competitive project-based pricing and flexible delivery terms (20-40 workdays based on complexity) support phased construction schedules, while a monthly supply capacity of 60 project sets ensures timely delivery. Customization options include corrosion-resistant upgrades (304 stainless steel) for humid environments, fire-resistant coating (fire resistance ≥1.5 hours) for commercial/public buildings, and lightweight design for projects in remote areas (easy transportation).

Qingdao Zhuolu Construction Engineering Co., Ltd. enhances project quality through detail-oriented management, ensures timely project progress with diligent work, and adds value and efficiency to projects through innovation and continuous learning. The company currently holds a second-level professional contracting qualification for steel structure engineering, a second-level professional contracting qualification for building decoration and renovation, as well as construction labor qualifications and other relevant certifications.