A Clear Span Rigid Primary Steel Frame is a high-performance structural system engineered for large column-free spaces (span ≥24m), integrating rigid connections, load-bearing optimization, and spatial flexibility. Manufactured with Q355B/Q460 high-strength steel (beams, columns) and Q355B connection plates, this product features a monolithic rigid-frame design—with fully welded or bolt-welded rigid joints between beams and columns—ensuring efficient transmission of vertical loads (dead load + live load) and lateral forces (wind, seismic action) without intermediate columns. The main beams adopt optimized I-shaped or box-section cross-sections (customizable from 500×200mm to 1200×400mm) with yield strength ≥345MPa, while columns use box-section or H-beam profiles (300×300mm to 800×400mm) to resist bending and axial compression, limiting structural vertical deflection to ≤L/500 (L=span length) and lateral displacement to ≤H/600 (H=frame height). Key features include rigid joint design (moment-resisting capacity ≥800kN·m) for enhanced stability, finite element analysis (FEA)-optimized section size to reduce material consumption by 15-20% compared to traditional frames, and factory prefabrication rate ≥95% (dimension error ≤±0.8mm) to minimize on-site construction time by 50%. The surface is treated with hot-dip galvanizing, epoxy paint, or fluorocarbon coating, providing salt spray resistance ≥1200 hours and adapting to indoor, outdoor, and industrial environments. It complies with GB 50017-2017 and AISC 360 structural standards, supporting span customization (24m-60m) and roof slope adjustment (5%-15%) to meet architectural and drainage needs. Professional services include wind tunnel testing, seismic performance simulation, BIM-based design integration, and on-site installation supervision, ensuring the frame meets the strict safety and spatial requirements of large-span projects.
Clear Span Rigid Primary Steel Frames are ideal for projects requiring unobstructed large spaces, widely used in industrial, commercial, and public buildings. Certified by GB 50017-2017, AISC 360, and ISO 9001, they meet international large-span structural standards. Typical applications include industrial workshops (automotive manufacturing, machinery processing), large-scale warehouses and logistics centers (span 30m-50m), public buildings (exhibition halls, stadiums, airport terminals), agricultural facilities (large greenhouses, livestock barns), and special structures (aircraft hangars, stage backdrops). They are particularly essential for projects where intermediate columns would hinder equipment layout, cargo handling, or public circulation—such as assembly line workshops and large-scale retail stores. The minimum order quantity is 1 set (customized per project), with full tailoring based on span size, load conditions, and architectural design. Competitive project-based pricing and flexible delivery terms (25-50 workdays based on complexity) support large-scale construction schedules, while a monthly supply capacity of 40 project sets ensures timely delivery. Customization options include corrosion-resistant upgrades (316L stainless steel, weathering steel) for coastal or industrial environments, fire-resistant coating (fire resistance ≥2 hours) for public buildings, and ultra-high-strength Q690 steel for super-large spans (≥40m) to reduce structural weight.
