Pre-Engineered Steel Buildings

PEB efficiency depends on tuning geometry to the load. We optimize frame spacing, eave height and roof slope together, adjust web taper and flange sizes along each rafter, and select purlin depth and gauge to suit the bay. Multi-span frames with interior columns are compared with clear-span options where the use permits. Standardizing door and opening framing, and limiting the variety of secondary profiles, reduces fabrication setups and simplifies site installation.

Primary frames are built up from plate with automated or semi-automated welding of flanges to tapered webs, typically using single-sided or double-sided fillet welds to the AWS D1.1, AS/NZS 1554.1 or EN 1090 requirements specified. Purlins and girts are roll-formed to profile with punched holes for bolting and bridging. End plates are drilled to templates to keep frame alignment consistent.

Every frame, purlin and bracing member is marked with its gridline and position so that site crews can assemble the building quickly. Knee and ridge splices are drilled as matched pairs to avoid site reaming. Framed openings, door jambs and canopy brackets are fabricated with the primary steel, so the complete building kit, including flange braces and sag rods, leaves the shop as a coordinated set.

Our inspection and test plan covers plate and coil receipt, web-to-flange welding, end plate flatness and hole positions, and coating thickness. Mill certificates for plate, coil and bolts are retained and linked to production batches. Visual inspection is applied to all welds, with ultrasonic or magnetic particle testing at end plate and knee connections as specified. Dimensional checks confirm member length, taper geometry and hole alignment, and the records are compiled into a quality dossier for each building.

Primary frames usually receive a shop primer or a full ISO 12944 system suited to the internal environment, commonly C2 or C3. Agricultural buildings, fertilizer stores or coastal warehouses may require C4 or C5 systems, or hot-dip galvanizing to ISO 1461. Secondary members are commonly supplied in pre-galvanized coil. Fire protection is applied only where the building code or insurer requires it, and we coordinate that early to avoid late changes.

PEB components are compact and well suited to export. Frames are nested, purlins and girts are bundled by length, and bolts, anchor bolts and accessories are boxed by building and gridline, so most buildings ship in standard containers. Loading is planned so that anchor bolts and the first frames arrive first. Each shipment includes packing lists keyed to erection drawings, plus the commercial and customs documents required for import at destination.

We supply anchor bolt plans, erection drawings and bolt schedules that show every frame, purlin and bracing member in position. Our engineers provide input to method statements covering frame lifting, temporary bracing of the first braced bay and purlin installation order. Remote advisory support or site technical supervision can be arranged when agreed. The building is erected by the contractor appointed by the client.