If your project needs cut and bent reinforcement, the short answer is yes: a bar bending schedule is what the supplier actually works from. Without one, you are guessing at quantities, shapes and lengths, and steel that arrives wrong is expensive to put right. Here is what Birmingham homeowners and small builders need to know before placing an order.
A bar bending schedule, usually shortened to BBS, is a table listing every bar in your reinforced concrete element. It is prepared from the structural engineer's drawings and follows BS 8666, the standard that sets out how reinforcement is scheduled, cut and bent.
Each line tells the fabricator exactly what to produce, so the steel turns up bundled and tagged, ready to be fixed in the right place.
If you are ordering cut and bent bar for ground beams, pile caps, a raft foundation, a retaining wall or a basement, you need a schedule. Fabricators around Birmingham and the Black Country will ask for it before they quote, because their price is based on tonnage, bar sizes and the number of bends.
You can often manage without one for simple jobs. A garage slab or extension floor reinforced with standard mesh sheets, such as A142 or A193 in 4.8 m by 2.4 m sheets, can be ordered by the sheet. The same goes for a handful of straight stock lengths, typically supplied at 6 m or 12 m.
Bear in mind that Birmingham sits largely on clay, and many plots in areas such as Harborne, Moseley and Sutton Coldfield have mature trees close to the house. That often pushes Building Control and engineers towards deeper trench fill, piled foundations or reinforced rafts rather than plain strip footings. Once an engineer has designed reinforcement, a schedule follows naturally.
The structural engineer may issue a schedule with the drawings, but on domestic work they often supply drawings only. In that case the schedule is produced by a detailer, the rebar supplier or your steel fixing contractor.
Costs depend on the size and complexity of the job. For a domestic extension or a small raft, scheduling from clear drawings typically falls somewhere between £100 and £400, and some suppliers absorb it into the steel price if you order from them. Larger or more intricate work, such as a basement with walls, slabs and starter bars, costs more because there are far more bar marks to detail.
Whoever prepares it, make sure it is checked against the latest drawing revision. A schedule taken from a superseded drawing is one of the most common causes of wrong steel on site.
Ordering by guesswork or by rough tonnage usually leads to one of a few problems, all of which cost more than the schedule would have.
Start with the engineer's reinforcement drawings and ask whether a schedule is included. If not, send the drawings to your fixer or supplier and ask for one to BS 8666.
Allow lead time. Local fabricators commonly turn cut and bent orders round in two to five working days, though this stretches in busy periods. Check delivery access too: many terraced streets in Birmingham will not take an articulated lorry carrying 12 m bars, so say so when you order and ask for shorter lengths or a smaller vehicle.
Finally, ask for bundles to be tagged by bar mark. It makes fixing quicker and the pre pour inspection far simpler.
Yes, if you only need standard mesh sheets or straight stock lengths. For any cut and bent reinforcement, suppliers will need a schedule to quote and fabricate accurately.
It depends on the appointment. Some structural engineers include it, but on domestic projects it is often prepared by the rebar supplier, a detailer or the steel fixing contractor from the engineer's drawings.
Once the schedule is approved, cut and bent steel is typically delivered within two to five working days in the Birmingham area. Allow longer for large orders or busy periods, and confirm vehicle access for your street.
Tell us the project, programme and scope, and whether you need supply, fix or both. We will come back to you.