Structure & Site
Reinforcement and Rebar Estimating Services in New Zealand
Reinforcing steel quantities by bar diameter, shape and element, plus mesh, laps, chairs and accessories, in tonnes and counts.
Reinforcing steel is easy to underestimate. A slab plan shows mesh and a few edge bars, but the real tonnage includes laps, starters, ligatures, trimmer bars at openings and the chairs that hold it all in place. Each of those adds weight and fixing time.
We take off reinforcing element by element from the structural drawings and bar schedules where they exist. Bars are listed by diameter, grade and shape, with laps and hooks allowed for as detailed. Mesh is measured by sheet type with laps. Chairs, spacers and tie wire are included so the steel fixer's full scope is visible.
For fixers and suppliers, we can produce a summary by diameter and grade that is ready for pricing or cutting.
Scope
What we measure in a reinforcement and rebar takeoff
| Item | Unit | What it covers |
|---|---|---|
| Straight bars | t / no. | By diameter, grade and length. |
| Shaped bars | t / no. | Ligatures, stirrups, L-bars and cranked bars. |
| Mesh | sheets / m² | By mesh type, with laps allowed. |
| Laps and anchorage | t | As detailed or to stated lap lengths. |
| Starter bars | no. / t | Starters and dowels at joints. |
| Chairs and spacers | no. | Bar chairs and spacers at a stated spacing. |
| Couplers | no. | Mechanical couplers where specified. |
Deliverables
What you receive
Rebar takeoffs include a summary by diameter and grade plus an element breakdown, so you can price supply and fixing separately.
| Itemised quantity sheet | Excel + PDF |
| Marked-up plans | Colour-coded PDF |
| Material and labour schedule | Excel |
| Assumptions and exclusions list |
Who it is for
Built for the people who price the work
- Builders
- Check reinforcing quantities before ordering for a commercial slab.
- Subcontractors
- Steel fixers can quote fixing time by element and bar size.
- Developers
- Understand reinforcing tonnage on foundations for difficult ground.
- Architects
- See the reinforcing effect of a thicker or more heavily loaded slab.
Process
How a reinforcement and rebar estimate runs
STEP 01
Upload plans
Upload structural drawings, bar schedules if available, and reinforcing notes.
STEP 02
Scope confirmation
We confirm lap lengths, chair spacing, grades and whether mesh or bar is used.
STEP 03
Takeoff and review
Reinforcing is measured element by element and checked against kilograms per cubic metre of concrete.
STEP 04
Delivery
You receive the rebar schedule, summary by diameter, PDF and marked-up drawings.
New Zealand context
Standards and practice
Reinforcing steel in New Zealand must comply with AS/NZS 4671. Grades such as 300E and 500E are commonly specified, with the E indicating ductility suited to seismic design. Grade affects price, so we report quantities by grade.
Seismic detailing under NZS 3101 often means closer-spaced ligatures and longer anchorages in columns, beams and walls than designers outside New Zealand might expect. We measure the detailing shown rather than standard ratios.
We measure and price to the drawings. Design compliance and building consent remain with your designer and building consent authority.
Cost drivers
What drives the cost of reinforcement and rebar work
01
Bar size mix
Many small bars take longer to fix than fewer large ones of the same weight. Ligature-heavy elements such as columns and beams cost more per tonne to fix than slab bars.
02
Grade
Ductile seismic grades and higher-strength bars carry different prices. Mixing grades on one job also adds handling and checking on site.
03
Laps and couplers
Long laps add weight; couplers reduce weight but add hardware and fixing time. The engineer's choice affects both supply and labour.
04
Prefabrication
Pre-tied cages and cut-and-bent supply can shorten time on site. Quantities by element help suppliers quote for prefabrication.
Where reinforcement and rebar estimates go wrong
Reinforcing is underestimated when laps, starters and trimmers are left out. These can add a significant percentage to the straight bar weight, and more in heavily detailed seismic elements.
Accessories are the other gap. Bar chairs, spacers, tie wire and couplers are needed on every job, and missing them leaves the steel fixer short on site. We include them with stated assumptions.
Fixing time at congested joints is also easily underestimated. Where beams, columns and walls meet, bars from several directions cross in a small space, and fixing them in the right order takes far longer than placing open slab mesh. We identify these congested zones in the estimate so labour can be allowed for them specifically.
FAQ
Reinforcement and Rebar Estimating questions
Do you prepare bar bending schedules?
We prepare quantity schedules by diameter and shape. Detailed bending schedules for fabrication are usually prepared by the supplier or a reinforcing detailer.
How do you allow for laps?
We use the lap lengths in the drawings or, where not shown, a stated lap length you can adjust.
Do you include chairs and tie wire?
Yes. Chairs, spacers and tie wire are included at stated rates.
Can you separate mesh from bar?
Yes. Mesh is reported in sheets and bar by diameter, so each can be priced separately.
Do you measure reinforcing for masonry?
Yes. Reinforcing in block walls can be measured here or with the masonry package.
Related services
- Concrete Estimating
Concrete volumes in m³, formwork in m² and reinforcing in tonnes, measured element by element from your structural drawings.
- Structural Estimating
Structural quantities measured straight from the engineer's drawings and schedules, across concrete, steel and engineered timber.
- Steel Estimating
Structural steel quantities by member and section, with tonnage, connections, coatings and erection items measured.
- Masonry Estimating
Block, brick and stone quantities by unit and wall type, with grout, reinforcing, ties and lintels counted alongside.
Get a quote
Send your plans for a reinforcement and rebar estimate
Upload your drawings and we will reply with a fixed fee and turnaround before any work starts. No obligation.
- — PDF, DWG and ZIP accepted
- — Fees in NZD, excluding GST
- — Prefer email? Use the link in the footer