SEED Works · Pre-engineered steel buildings
Pre-engineered steel buildings start at a bolt.
This is the knee of a SEED portal frame: two tapered members meeting through an end plate and high-strength bolts. Scroll, and the camera pulls back to the whole building. Then you draw your own.
Foundations
Down the column to the base.
Anchor bolts are cast into each footing to a steel template, so every column lands exactly where the drawings put it. The base plate sits on the bolts, is levelled, then grouted underneath.
- Anchor bolts set to template
- Grouted base plate
- Pinned or fixed column base
Primary frame
One frame, tapered where the load is.
Columns and rafters are welded from plate into I-sections that are deep where bending is highest, at the knee, and shallow where it is not. Rafters arrive in shippable lengths and bolt together at end-plate splices.
Frames and bays
Repeated, bay after bay.
Frames stand 6 to 9 m apart, as many as the length needs. Wider bays mean fewer frames but heavier purlins; SpanPlan lets you weigh one against the other.
Secondary steel and bracing
Purlins, girts and rods tie it into one box.
Cold-formed Z purlins span between frames on the roof and girts do the same on the walls. Purlins lap over each frame so they work as one continuous beam; sag rods and flange braces keep everything straight. X-bracing in the end bays ties the frames into one stiff box. Wind on the gable and earthquake load along the building travel through the rods to the foundations.
Openings and envelope
Then it is closed in.
Roller shutters, personnel doors and louvres get jambs, headers and canopies designed with the frame, so the girts and bracing work around them. Profiled roof and wall sheets, glasswool or sandwich panels where the building needs climate control, translucent skylights, ridge ventilation, and eave gutters with downpipes.
The building type
What a PEB is
A pre-engineered building, or PEB, is a steel building whose frames are designed for the loads on your site and made from welded plate rather than standard rolled sections. The tapered frame is sized for the forces in it; steel weight depends on the building geometry and its design loads. Every part is cut, drilled and welded in the plant, then bolted together on site, so erection is fast and the building can be extended later if the design allows for it.
SEED Works designs the frame, fabricates it in SEED’s own PEB plant and erects it on site: one contract from drawing to handover.
Planning limits
Spans and sizes
These are indicative SpanPlan planning options, not certified building or lifting capacities. SEED engineering must confirm geometry, loads, members and connections for the project site.
| Clear span option | 12 to 48 m in SpanPlanThe planner also offers widths up to 96 m using two to four spans with interior columns. |
|---|---|
| Bay spacing option | 6, 7.5 or 9 m in SpanPlanThe appropriate spacing depends on the project design. |
| Eave height | 5 to 14 mSet by racking, cranes and the use of the building. |
| Roof slope | 1 : 10Steeper slopes are engineered on request. |
| Crane provision option | 5 to 20 t per span in SpanPlanCrane loads, beams and frames require site-specific engineering. |
| Length | Choose bays in SpanPlanFuture extension requires an expandable end-wall design. |
Applications
What SEED PEBs are built for
- Dry storage6–9 m eave
General goods, FMCG and spare parts. Single-skin sheeting with daylight and ridge ventilation.
- Cold storage9–12 m eave
Chilled and frozen goods. Insulated sandwich panels and a sealed envelope.
- Factories and workshops9–14 m eave
Production, assembly and maintenance. Insulated roof; crane-ready frames on request.
- Agri and produce8–12 m eave
Grain, cotton and packing halls with strong cross-ventilation.
- Vehicle and equipment sheds5–8 m eave
Fleet parking and machinery with wide doors and a simple envelope.
Pricing
What sets the price
The price of a PEB follows its steel and its envelope. SpanPlan, the SEED Works planner on this page, measures both from the model as you design: tonnes of steel, kilograms per square metre of floor, and square metres of roof and wall. Wider spans, taller eaves and wider bays add steel. Insulated panels, more doors, cranes and mezzanines add cost. Site wind and seismic loads are designed in by SEED engineering and confirmed in the quote.
Use the indicative quantity build-up to prepare your brief, then request a project-specific quotation from SEED Works. Pricing requires an agreed scope, site loads and a dated price basis.
- Span
- Wider clear spans need deeper, heavier frames.
- Eave height
- Taller columns and more wall area.
- Bay spacing
- Fewer frames, but heavier purlins.
- Envelope
- Single skin costs least; PIR panels most.
- Openings
- Each shutter is framed into the steel.
- Site loads
- Wind, seismic zone, cranes and mezzanines.
From brief to handover
How a SEED project runs
- Brief
Size, use, doors and site. SpanPlan, the planner on this page, produces the brief in a few minutes.
- Design
SEED engineering designs the frames for your site’s loads and models the building in 3D.
- Approval drawings
General arrangement and anchor bolt plans for your sign-off and for the civil works.
- Fabrication
Plates are cut, welded into tapered members, drilled and painted in SEED’s plant.
- Delivery
Members are marked to the erection drawings and shipped in the order they go up.
- Erection
Frames, secondary steel, bracing and envelope are bolted together on site.
- Handover
As-built drawings and the building, ready for use.
Questions
PEB questions, answered
What is a pre-engineered building (PEB)?
A steel building with frames designed for the loads on its site and fabricated from welded plate, usually tapered, plus cold-formed purlins, girts and a sheeted envelope. Parts are made in a plant and bolted together on site.
How much does a PEB cost in Pakistan?
It depends mostly on steel weight and envelope. Use SpanPlan, the free planner on this page, to size your building and see the steel and sheeting quantities. Request a project-specific quotation from SEED Works based on an agreed scope, site loads and a dated price basis.
What span options can I explore in SpanPlan?
SpanPlan offers clear-span options up to 48 m and widths up to 96 m using two to four spans with interior columns. These are planning limits, not certified capacities. SEED engineering must confirm the structure for the project site.
Can a PEB carry an overhead crane or a mezzanine?
SpanPlan includes indicative crane-provision options from 5 to 20 t per span and mezzanine floors. These options are not a lifting-capacity approval; SEED engineering must confirm loads and design the frames, crane beams and floors for the project.
Is a PEB suitable for cold storage?
Yes, with insulated PIR sandwich panels and a sealed envelope without skylights or vents. SpanPlan sets these defaults when you choose cold storage.
Can the building be extended later?
Yes, if the end wall is designed as an expandable frame from the start. SpanPlan has an expandable end wall option for either end.
SpanPlan
Your turn. Start from a blank footprint.
The building above was an example. In SpanPlan you start from the floor area you need and shape it in seven steps, with steel, sheeting and quantities measured from the model as you go. A saved design can be resumed, or started again from scratch.
- 1Footprint
- 2Purpose
- 3Height
- 4Openings
- 5Interior
- 6Envelope
- 7Review
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