What each is good at
Reinforced cement concrete is cast on site: columns, beams and slabs in a frame that can carry any number of floors, heavy machine loads and a sealed envelope. It is slower to build and better at carrying weight. A pre-engineered building is a steel portal frame fabricated off site and bolted up on a concrete base, clad in sheet or panel. It is faster, spans wider and is easier to extend along its length; it does not carry upper floors well and needs separate foundations for heavy plant.
The trade-offs
| Factor | RCC | PEB |
|---|---|---|
| Clear span | Economical to about 12 to 15 m without deep beams; long spans need post-tensioning or portal frames in concrete. | Portal frames span 30 m and more without intermediate columns. The usual answer for a wide single-storey shed. |
| Height and floors | Any number of floors. The Keshwana block is G+4 at 25 m; the Neemrana first-floor addition carried finishing and structural steel on an RCC frame. | Single-storey by default; mezzanines in steel are common, full upper floors are not. |
| Floor loading and vibration | Heavy machine foundations, presses and high floor loads sit on concrete. Vibration damping is better. | Heavy plant needs its own concrete foundations inside the shed; the frame carries roof and cladding, not machines. |
| Programme | Slower: shuttering, curing and floor-by-floor sequencing. Faster where formwork is repetitive. | Faster: frames arrive fabricated and go up in weeks. The roof is on early, which lets other trades in. |
| Fire and thermal mass | Inherent fire resistance; thermal mass steadies internal temperature. | Steel needs fire protection where the occupancy demands it; cladding decides the thermal performance. |
| Later change | Hard to extend sideways without a planned joint; easy to add floors if designed for it. | Easy to extend bay by bay along the length; hard to add a floor. |
| Cold stores | Carries a heavy insulated envelope and the plant well; suits multi-storey or multi-chamber stores on tight sites. | Common for single-storey stores; the envelope hangs inside the frame. The frame must be built true or the panels will not seal. |
What the portfolio shows
Where OEMs wanted height, load and long life, they chose concrete: the 90,000 sq ft FA Dol building at Hero MotoCorp Neemrana is RCC with a 5.5 m clear height and long-span bays; the Agro Allied complex at Keshwana has a G+4 RCC block at 25 m within 1,60,000 sq ft; the 1,00,000 sq ft first floor at RIICO Phase-II Neemrana is RCC with structural steel. Where a client wanted a wide shed up fast, they chose steel: two PEB buildings with civil and interiors for TVS Mobility at Faridabad, and a PEB industrial building for Agro Allied at Kotputli, the same client who chose RCC at Keshwana. The choice was made per building, which is the point.
Composite answers
Many plants are both: an RCC office and utility block, a PEB production shed, RCC machine foundations inside it. Warehouses with mezzanines pair a steel roof with a concrete mezzanine floor. Cold stores are most often a PEB or RCC shell with the insulated chamber built inside it; either frame works if it is built to tolerance, because the panels seal against the frame, not the other way round. Why gas-tightness is a civil problem explains why that tolerance matters.
How we decide with you
- What goes inside: machine loads, racking, crane, clear height and any future floor.
- The site: ground bearing capacity, water table, seismic zone, wind and snow.
- The programme: when the roof must be on and when production must start.
- The future: extension sideways or upwards, and whether the building will change use.
- The envelope: for a cold store, how the chamber will be hung and sealed.
We put the answer in the scope review with the reasons, so the decision is recorded and can be revisited if the brief changes.