Pre-Engineered Buildings (PEB) | WSB Infra & Crafts

What Are Pre-Engineered Buildings?

A Pre-Engineered Building (PEB) is a steel building system where structural members are designed, fabricated, and coated in a factory, then shipped to site for rapid bolted assembly. Unlike conventional steel construction where every beam is cut and welded on-site, PEB components are pre-engineered using advanced software (STAAD Pro, Tekla) and manufactured with CNC precision — resulting in up to 30% lighter structures and 40% faster project timelines.

PEBs use high-tensile steel (IS 2062 E250–E350 / ASTM A572 Grade 50) for primary frames, cold-formed Z/C sections for purlins and girts, and roll-formed profiled sheets for roofing and cladding. The entire system is designed as an integrated unit using finite element analysis, ensuring optimum material usage at every joint.

PEB Structure — Components

Every PEB consists of precisely engineered subsystems that work together as a unified structural system.

01

Primary Framing

Built-up I-sections (tapered or uniform) for columns and rafters, rigidly connected to form portal frames. Sizes range from 300 mm to 1500 mm depth, fabricated from high-tensile steel plates on automated beam welding lines.

02

Secondary Members

Cold-formed Z-section purlins (roof) and C-section girts (walls), roll-formed from pre-galvanized high-tensile steel. Spacing typically 1.5 m to 2.5 m. Designed as per AISI S100 / IS 801.

03

Roof & Wall Cladding

Profiled sheets in Galvalume (AZ150) or pre-painted steel, roll-formed on-site or factory-cut. Profiles: trapezoidal (RB-28, 35), standing seam. Insulation options: glass wool, rockwool, PUF.

04

Bracing System

Rod, angle, or pipe bracing in roof and side planes to transfer lateral loads (wind, seismic) to the foundation. Designed per IS 875 (wind) and IS 1893 (seismic).

05

Anchoring & Foundation

Anchor bolt cages embedded in RCC pedestals — size and quantity derived from column base reactions. Typically M24–M36 bolts in Grade 4.6 or 8.8, with 50–75 mm projection.

06

Accessories

Turbo roof ventilators, polycarbonate skylights, ridge vents, downpipes, gutters, walkway doors, roll-up doors, louvers, bird mesh, and crane girders for EOT crane support.

Technical Specifications

Our PEB structures are engineered to meet the highest design and material standards.

Parameter	Specification
Material Grade	IS 2062 E250 / E350 (Fe 410 / Fe 490), ASTM A572 Grade 50, ASTM A36
Design Standards	IS 800 (LSM), AISC 360, MBMA, IS 875 (wind), IS 1893 (seismic)
Secondary Members	IS 801 / AISI S100 cold-formed steel, pre-galvanized Z/C sections
Welding Standards	AWS D1.1, IS 9595
Coating System	Hot-dip galvanized (HDG) or Zinc-rich primer + epoxy + polyurethane (for corrosive environments)
Cladding	Galvalume AZ150 (0.47–0.60 mm) or pre-painted steel (0.50–0.80 mm)
Clear Span	Up to 90 metres (single-span); multi-span unlimited with intermediate columns
Eave Height	Up to 30 metres (customisable)
Crane Capacity	Up to 50 T EOT cranes (underslung or top-running)
Wind Speed Design	Up to 55 m/s (as per IS 875 Part 3 wind zone map)
Seismic Zone	Up to Zone V (IS 1893)

Applications

PEB structures are used across a wide range of industries and building types.

Warehouses & Logistics

Large clear-span storage facilities with dock levellers, mezzanine floors, and multi-bay layouts for distribution centres.

Factories & Manufacturing Plants

Production halls with integrated crane systems, machine foundations, and partitioned office mezzanines.

Aircraft Hangars

Wide-span hangars (up to 90 m) with massive sliding doors, aircraft maintenance pits, and CAT-I lighting provisions.

Cold Storage

Insulated PEB envelopes with PUF panels, vapour barriers, and refrigeration-ready structural supports.

Commercial Complexes

Showrooms, shopping malls, sports arenas, indoor stadiums, and convention centres with architectural cladding.

Oil & Gas / Process Plants

Pipe-rack structures, equipment shelters, compressor houses, and blast-resistant control rooms.

Advantages Over Conventional Construction

Why PEB is the preferred choice for modern industrial and commercial projects.

40% Faster Delivery

Factory fabrication and bolted site connections reduce construction time from months to weeks. A 50,000 sq.ft. warehouse can be erected in 8–10 weeks.

20–30% Cost Savings

Optimised steel weight (up to 30% lighter), reduced foundation costs, minimal on-site labour, and zero material wastage from precision manufacturing.

Flexible Spans & Heights

Clear spans from 15 m to 90 m without intermediate columns. Eave heights up to 30 m. Easy future expansion by extending the frame or adding bays.

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