Steel market
A £100/tonne movement in reinforcement purchase cost typically changes the installed rate by about £105–£115/tonne after allowances and margin.
Bar diameter
Predominantly small-diameter bars can increase fixing cost by £250–£600/tonne because many more bars and intersections are required.
Congestion
Dense laps, links and intersecting cages commonly add 15%–35% through slower placing and tying.
Couplers
Mechanical connections can add £100–£400/tonne overall, depending on coupler type, bar diameter and frequency.
Quantity and continuity
Small, intermittent pours may attract £200–£500/tonne compared with continuous work offering stable gang utilisation.
Access and handling
Restricted craneage, double handling or remote workfaces can add 10%–25% to the fixing element.