Factory Direct CE Q355 Prefab Portal Frame Steel Structure Warehouse Industrial Workshop Metal Building Custom Design

High-strength Q355 steel portal frame main frame with complete CE certification, stable load-bearing capacity, excellent wind, snow and earthquake resistance, suitable for long-term industrial warehouse and workshop use, meeting international building safety standards.Full prefabricated steel structure with all components finished in our factory, only bolt connection required on site, no complex welding work, greatly shorten construction period and cut labor & construction cost for buyers.Fully customizable design service: free CAD drawing support, adjustable span, height, roof slope, door & window layout, we tailor metal building size and structure according to your production and storage demands.Large clear column-free inner space brought by portal frame system, maximize space utilization rate, convenient for production line layout, goods stacking and large mechanical equipment operation inside the workshop & warehouse.Multiple anti-corrosion surface treatments available (hot dip galvanized or anti-rust paint coating), effectively avoid rust damage, extend building service life up to 50 years with low daily maintenance cost.Direct factory supply without middlemen, one-stop supporting service including structure frame, wall & roof panels, doors, windows and installation accessories, flexible delivery and professional remote installation guidance provided.