A steel package's programme is a chain of stages: drawing approval, steel procurement, detailing, fabrication, surface treatment, delivery and erection. There's no fixed duration; the real drivers are tonnage, complexity, how fast drawings are approved and mill lead times, and most of those you can influence.
The stages, in order
- Drawing approval: design drawings and connections signed off
- Detailing: shop drawings and the 3D model produced and approved
- Procurement: steel ordered, subject to mill and stockholder lead times
- Fabrication: cutting, drilling, welding and assembly
- Surface treatment: galvanising, paint or intumescent protection
- Delivery and erection: steel to site and the frame stood up in sequence
What actually drives the timeline
Two jobs of the same tonnage can have very different programmes. The biggest variables are:
- How quickly the design team turns around drawing approvals
- Steel procurement and mill lead times, which move with the market
- Detailing complexity, which rises with connection design and the number of unique pieces
- The surface treatment specified, as galvanising and intumescent add steps
- Site readiness and the erection sequence
What compresses the programme
Complete, early information shortens everything downstream. So does ordering steel early against a firm design, and taking fabrication and erection as one package, which removes the hand-off between separate suppliers and keeps the whole job on one schedule.
What extends it
Late or changing approvals, design changes after detailing has started, special or long-lead materials, and constrained sites that limit deliveries or craneage all stretch the programme. Flagging these early lets us plan around them rather than re-plan mid-job.
Plan it against your project
The only honest timeline is one built against your drawings and programme. Send them over and we'll come back with a realistic fabrication and erection programme, not a generic number.
Common questions
- How long does structural steel fabrication take?
- There's no single answer. The programme depends on tonnage, complexity, how fast drawings are approved and steel mill lead times. The reliable way to get a timeline is to have it built against your actual drawings.
- What's the biggest cause of steel programme delays?
- Late or changing drawing approvals, and steel procurement lead times. Both sit early in the chain, so a slip there pushes everything downstream. Complete information and early sign-off are the best protection.
- Can fabrication start before all drawings are approved?
- Sometimes, through phased release: approved packages can proceed while others are finalised. It needs careful sequencing, but it can keep a programme moving when later areas are still being designed.