Steel is a fast way to cover space: a car porch shed, a rooftop shade, a warehouse on an industrial plot or a mezzanine inside a shop. Because these structures carry wind, roof sheets and sometimes people and goods, they should be designed, not guessed. In Lahore, monsoon storms put light sheds under real wind load.
What's included
| Structure | What it is | Typical components |
|---|---|---|
| Car porch / canopy shed | Light frame covering parking | Columns, purlins, roof sheet, gutters |
| Rooftop shed | Shade or covered area on a roof | Light frame anchored to slab |
| Warehouse / industrial shed | Portal frame building | Foundations, columns, rafters, bracing, cladding |
| Mezzanine floor | Intermediate floor inside a building | Beams, columns, decking, stairs, railing |
| Pre-engineered building | Factory-designed frame assembled on site | Built-up sections, bolted connections |
A complete scope also covers foundations or anchor bolts, roof and wall sheeting, gutters and downpipes, painting and erection.
When you need it
- Covering parking or open areas
- Building a factory, warehouse or cold store
- Adding storage space inside a shop or warehouse
- Temporary or semi-permanent structures for events or sites
Step-by-step process
- Define use and size – span, height, loads (people, goods, cranes), roof type.
- Check rules – confirm whether your scheme allows the structure and how it counts towards covered area.
- Structural design – a PEC-registered structural engineer designs members, connections and foundations.
- Shop drawings and quote – fabricator prepares drawings and prices them.
- Foundations – built and cured before steel erection.
- Fabrication – cutting, welding or bolting in the workshop.
- Surface treatment – cleaning and primer before delivery.
- Erection – lifting, aligning, bolting, bracing.
- Sheeting and finishing – roof and walls, gutters, final paint.
- Handover – with drawings for your records.
Approvals and rules in Lahore
- DHA Lahore: covering an open area or pergola with steel, fibreglass or similar sheets counts toward covered area; sheds and pergolas of any material are prohibited on green rooftops; commercial plans need a stability certificate from a PEC-registered consulting engineer (DHA Construction Regulations).
- LDA: industrial buildings and complexes on plots of 20 kanals or more need an EIA and EPA NOC, and the regulations include proposed rules requiring structural stability certificates for temporary marquees (LDA Building and Zoning Regulations).
- Structural steel is covered by Pakistan Standard PS 4798 on PSQCA's compulsory certification list (PSQCA).
For other schemes and industrial estates, check with the relevant office.
What affects the cost
There is no published standard rate. Sheds and structures are commonly priced per square foot of covered area or per kg (or ton) of steel. Factors:
- Span, height and loads
- Steel sections and total tonnage
- Roof and wall sheet type and thickness
- Foundations and civil work
- Paint system or galvanising
- Crane and erection access
- Steel market price on the order date
Questions to ask
- Who is the structural engineer, and what is their PEC number?
- Do you work from the engineer's drawings?
- What sections and plate thickness will be used?
- How are columns anchored to the foundation?
- What wind load was the design checked for?
- Are gutters, downpipes and sheet overlaps included?
- What paint system, and how many coats?
Red flags
- No drawings or engineer, just "we have built many like this"
- Undersized purlins that sag under sheets
- Columns bolted to a slab without checking the slab can take it
- No bracing on tall or long sheds
- Price per kg quoted without a weight estimate
- Erection without safety harnesses or proper lifting
FAQs
Do I need an engineer for a small car porch shed? For a light canopy, an experienced fabricator may manage, but any shed exposed to storm wind benefits from an engineer's check of sections and anchoring.
Does a steel shed count as covered area? In DHA Lahore, yes, covering an open area with steel or similar sheets counts toward covered area.
Bolted or welded? Both are used. Bolted connections are easier to inspect and dismantle; welded ones depend heavily on weld quality.
How long do steel sheds last? It depends on paint system, maintenance and drainage. Repaint rusted areas early and keep gutters clear.