STE/General/TBT-STE-006

Steel Erection Sequence Planning

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Steel Erection Sequence Planning

Toolbox Talk Record

Ref: TBT-STE-006  |  Issue: 1  |  Date: March 2026
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What?

  • Steel erection must follow a planned sequence to maintain structural stability at every stage.
  • An unplanned sequence can leave partially completed frames vulnerable to collapse.
  • The erection sequence is defined by the structural engineer and must be followed exactly.
  • Temporary bracing must be installed at each stage until permanent connections are made.
  • Wind loading on partially erected frames is a major risk — incomplete structures are vulnerable.
  • The CDM 2015 construction phase plan must address the erection sequence at each stage.
  • Column bases must be grouted and bolt connections torqued before releasing cranes.
  • The appointed person must coordinate crane positions with the erection sequence plan.
  • All connection bolts must be installed and tightened before moving to the next bay.
  • Deviation from the planned sequence requires written approval from the structural engineer.

Why?

Prevent collapseUnbraced or incorrectly sequenced steel frames collapse under wind or self-weight.
Structural integrityEach stage must be stable before the next is started.
Legal requirementCDM requires a planned approach with temporary stability at every step.
Worker safetyOperatives on unstable steel risk falls and crushing.
Do Don't
  • Follow the erection sequence plan exactly as specified by the engineer.
  • Install temporary bracing at each stage before releasing the crane.
  • Verify column bases are grouted and holding down bolts are torqued.
  • Check all connections are bolted and tightened before the next bay.
  • Coordinate crane positions and lifts with the planned sequence.
  • Monitor wind conditions and stop erection if speeds exceed safe limits.
  • Brief the erection team on the planned sequence at the start of each day.
  • Record completion of each stage including bracing and connection checks.
  • Get written approval from the engineer before deviating from the sequence.
  • Inspect previously erected steelwork for movement or distortion each morning.
  • DON'T erect steel in a different sequence without the engineer's written approval.
  • DON'T release the crane from a member until temporary bracing is secured.
  • DON'T leave connection bolts untightened and move on to the next bay.
  • DON'T remove temporary bracing until permanent connections are fully complete.
  • DON'T erect steel in high winds above the method statement limits.
  • DON'T skip the morning inspection of previously erected steelwork.
  • DON'T allow uncontrolled access to partially erected steel frame areas.
  • DON'T load steelwork with materials before the engineer confirms it is safe.
  • DON'T assume the team knows the sequence — brief them every day.
  • DON'T proceed if column bases show movement or inadequate grouting.

See also: Steel Erection Safety | Temporary Bracing and Stability
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