A decision you can check
- 01
Define reinforcement purpose
Clarify whether the design addresses temperature and shrinkage, concentrated loads, edge conditions or structural spanning.
- 02
Record size and spacing
Write the bar designation or mesh specification, spacing, laps and edge clearances. A generic note such as 'add rebar' cannot produce a takeoff.
- 03
Plan chairs and cover
Support reinforcement at the specified elevation and maintain concrete cover. Pulling mesh upward during placement is difficult to verify.
- 04
Coordinate joints and openings
Map control joints, isolation joints, thickened edges, penetrations and dowels so reinforcement does not conflict with the intended movement plan.
Write a specification someone else can check
Fibres, welded wire and bars are not automatically interchangeable because they distribute reinforcement differently.
More steel cannot correct poor subgrade, inadequate thickness, uncontrolled water or missing curing.
- Define reinforcement purpose
- Record size and spacing
- Plan chairs and cover
- Coordinate joints and openings
Convert the decision into quantities
Enter the measured geometry in the Concrete Calculator, replace defaults with the selected product coverage and round only at the final purchasable unit. List accessories and preparation materials separately so a coverage change does not silently scale unrelated items.
Cutting, bending and placing steel exposes workers to sharp ends and handling hazards; plan the work and protective controls.
Verify at order and delivery
Check the exact local designation or product code, performance class, size, colour or batch where relevant, stated coverage, yield, density or capacity, ordered quantity and accessory compatibility on the written order. Inspect delivered concrete system before installation and isolate damaged or mismatched material while return and replacement options remain open.
What usually throws the order off
- Choosing strength from price alone
- Adding water without supplier control
- Leaving reinforcement on the subgrade
- Treating reinforcement as a replacement for joints
Frequently asked questions
What must the concrete system specification identify?
Make the scope checkable against these decisions: define reinforcement purpose; record size and spacing; plan chairs and cover; coordinate joints and openings. Record the exact local designation or product, performance class, dimensions, finish where relevant, accessories and controlling technical document.
Which calculator default changes after product selection?
Replace whichever default the exact concrete system controls—coverage, yield, density, dimensions, package quantity or capacity—while keeping the verified project geometry unchanged.
Who should approve a substitution?
The owner and responsible designer or installer should confirm in writing that the substituted concrete system preserves required performance, appearance, compatibility, installation method and documented supplier or project acceptance criteria.
Technical references
These references support the measurement and planning method. Product instructions, the site and applicable local requirements control the final installation.