The Step-by-Step Pre-Engineered Building (PEB) Manufacturing Process

The primary advantage of Pre-Engineered Buildings is the speed and precision achieved by shifting structural fabrication from the construction site to a controlled factory environment. This article outlines the manufacturing workflow at Deepika Builtech's units, displaying how raw steel is processed into columns and rafters. Our expertise in pre-engineered building (PEB) construction in Chennai ensures high dimensional accuracy. Step 1: Engineering Detailing (Tekla and CAD) Before fabrication begins, our design team creates a 3D model using Tekla Structures. This software generates exact shop drawings, bolt hole locations, and Bill of Materials (BOM). The digital files are loaded directly into our CNC machinery. Step 2: CNC Plate Cutting At our modern CNC fabrication facilities in Ambattur, Chennai, components are produced to IS 800 specifications. Fabrication of a standard 20,000 sq.ft PEB frame is completed within 4 to 6 weeks, costing around ₹400 to ₹700 per sq.ft for primary steel fabrication. We utilize Grade 345 MPa steel for primary framing. Step 3: Flange and Web Assembly The cut flange and web plates are aligned to form H-beams or tapered sections. We use automatic assembly machines to tack-weld the plates into position, ensuring squareness and alignment. Step 4: Automated Submerged Arc Welding (SAW) The assembled beams are processed through automated submerged arc welding lines. SAW provides deep penetration welds with minimal heat distortion, ensuring structural integrity under high loads. Step 5: Connection Plate Fitment and Drilling End plates, stiffeners, and base plates are welded to the beams. Connection bolt holes are pre-drilled using CNC multi-spindle drills, ensuring alignment during on-site erection. Step 6: Shot Blasting and Paint Protection The fabricated members are shot-blasted to SA 2.5 standard to remove rust and scale. They are then painted with zinc-rich epoxy primers and protective topcoats to resist corrosion, conforming to strict steel structure fabrication standards.