Q235B Prefabricated Primary Steel Frame Modular Structural System For Rapid Construction

Product Description
A Prefabricated Primary Steel Frame is an efficient, modular structural system engineered for rapid construction, precision assembly, and consistent quality, integrating fully prefabricated components and standardized connections. Manufactured with Q355B/Q460 high-strength steel (beams, columns, node plates) and 10.9-grade high-strength bolts, this product features 95%+ factory prefabrication—all components are CNC-cut, welded, and precision-machined to dimension error ≤±0.5mm, ensuring seamless on-site "plug-and-play" assembly without custom fabrication or on-site welding. The main beams and columns adopt optimized I-shaped, box-section, or H-beam profiles (beams: 300×150mm-800×300mm; columns: 250×250mm-600×300mm) with yield strength ≥345MPa, providing lateral stiffness ≥1.2×10⁵ kN/m and anti-seismic performance for zones 6-8 degrees, while limiting vertical deflection to ≤L/500 (L=span length). Key features include standardized modular interfaces for rapid assembly (construction time reduced by 60% vs. traditional frames), minimized on-site waste (≤5% material loss), and compatibility with BIM-based modular design. The surface is treated with hot-dip galvanizing, epoxy powder coating, or fluorocarbon paint, offering salt spray resistance ≥1200 hours and adapting to indoor, outdoor, and industrial environments. It complies with GB 50017-2017, EN 1090, and AISC 341 standards, supporting customization of span (10m-30m), column spacing (6m-12m), and frame configuration (clear span, multi-span). Professional services include factory pre-assembly testing, BIM installation simulation, on-site training, and quality inspection, ensuring efficient, safe, and high-quality construction.
Applications
Prefabricated Primary Steel Frames are ideal for fast-track construction, modular buildings, and large-scale projects requiring consistency and efficiency. Certified by ISO 9001, EN 1090, and GB 50017-2017, they meet strict prefabrication and structural standards. Typical applications include prefabricated industrial workshops (rapidly built production facilities), modular commercial complexes (office pods, retail centers), public buildings (schools, hospitals, disaster relief shelters), logistics warehouses (large-scale storage with phased construction), and residential buildings (steel frame modular houses). They are particularly suitable for projects with tight schedules (e.g., emergency construction, fast-track development), remote sites (no on-site fabrication capacity), or large-scale developments (uniform quality control). The minimum order quantity is 5 sets for standard modules, with full customization based on project layouts and load requirements. Competitive modular pricing and bulk discounts enhance cost-effectiveness, while short delivery times (10-20 workdays for standard modules) support urgent schedules. Customization options include corrosion-resistant upgrades (304/316L stainless steel), fire-resistant coating (≥1.5 hours), and lightweight aluminum alloy modules for ultra-portable applications.
2. Crane-Support Primary Steel Frame - 吊车承重主钢框架
Product Description
A Crane-Support Primary Steel Frame is a heavy-duty structural system engineered specifically to withstand crane-induced loads (vertical lift load, horizontal braking force, lateral sway), integrating enhanced load-bearing capacity, anti-fatigue performance, and stability. Manufactured with Q460/Q690 ultra-high-strength steel (main beams, columns) and QT450 ductile iron (crane rail supports), this product features reinforced main beams (box-section or double I-beam, 600×300mm-1200×500mm) with yield strength ≥460MPa, and columns (box-section, 400×400mm-800×800mm) reinforced by stiffeners to resist axial compression and bending from crane operations. The frame is optimized via finite element analysis (FEA) to distribute dynamic loads (5-200 ton crane capacity) evenly, with vertical deflection limited to ≤L/600 (L=beam span) and lateral displacement ≤H/800 (H=frame height). Key features include crane rail support nodes with shockproof rubber pads (Shore hardness 60-70) to absorb vibration, 12.9-grade high-strength bolts with double-nut anti-loosening design, and factory prefabrication rate ≥95% to ensure precision (dimension error ≤±0.8mm). The surface is treated with hot-dip galvanizing (zinc layer ≥100μm) or fluorocarbon coating, providing salt spray resistance ≥1500 hours and adapting to industrial environments (dust, oil fumes). It complies with GB 50205, AISC 360, and EN 1993-1-6 standards, supporting customization of crane capacity (5-200 tons), span (15m-40m), and rail type (QU70-QU120). Professional services include load calculation, fatigue life simulation, on-site installation supervision, and crane operation performance testing.

Applications
Crane-Support Primary Steel Frames are specialized heavy-duty solutions for industrial facilities requiring crane operations, trusted for their load-bearing capacity and durability. Certified by GB 50205, AISC 360, and ISO 9001, they meet strict industrial structural standards. Typical applications include heavy industrial workshops (steel mills, forging plants, machinery manufacturing), logistics and warehousing centers (container yards, port cargo terminals), power generation facilities (coal-fired power plants, wind turbine assembly), and special engineering projects (bridge fabrication yards, offshore equipment workshops). They are particularly essential for facilities with overhead cranes, gantry cranes, or jib cranes, where dynamic loads and repeated operations demand anti-fatigue and high-stiffness structures. The minimum order quantity is 1 set (customized per project), with full tailoring based on crane capacity, span, and load conditions. Competitive project-based pricing and flexible delivery terms (25-50 workdays) support industrial construction schedules, while a monthly supply capacity of 40 project sets ensures timely delivery. Customization options include corrosion-resistant upgrades (super duplex stainless steel), fire-resistant coating (≥2.5 hours) for power plants, and vibration-damping components for high-frequency crane use.