Position, support, anchorage, and constructability
Place the designed arrangement
Reinforcement quantity and reinforcement position are both important. Confirm layer order, face designation, bar orientation, hooks, splice zones, and continuation through supports. Moving a bar away from its detailed depth can change the structural relationship even if the bar count is unchanged. Cover is measured to the specified outermost steel, which may be a stirrup or another outside component rather than the main-bar centre. A bar touching the form cannot be assumed to gain the required cover when concrete arrives.
Keep it stable throughout construction
Chairs, spacers, bolsters, ties, and temporary bracing must suit the assembly and the loads it will encounter. An arrangement that looks correct before workers enter it may move under access loads, pumping, discharge, or consolidation. Check whether supports can sink, overturn, or slide. Plan travel routes and material storage so that the mat is not subjected to unassessed loading. A freestanding cage needs an appropriate temporary-stability arrangement; a worker's hands or ordinary tie wire are not universal structural bracing.
Understand connection functions
Ordinary tying wire holds bars in position during construction. It is not assumed to transfer the designed force of a structural lap or to replace confinement reinforcement. A lap splice works through the specified interaction of bars and surrounding concrete, so length, location, spacing, and confinement must follow the approved detail. A mechanical coupler depends on matched components, correct bar preparation, engagement, and the specified installation method. Do not replace its requirements with a universal number of turns or a torque remembered from a different system. Welding also needs a permitted material and approved procedure.
Coordinate before concealment
Check that reinforcement and embedded services can coexist while preserving the required concrete passage and consolidation access. Do not cut a main bar or move a sleeve simply because the other component is inconvenient. Resolve conflicts through the authorized project process. During placement, respond to displaced bars or failed supports using the safe approved method before the wrong position becomes buried. Check mesh orientation, elevation, and laps as carefully as bars. The finished arrangement must satisfy the coordinated design, not merely be dense enough to look convincing.