The erection sequence for a steel frame determines the structural stability at every stage of construction. An incorrect sequence can leave sections of the frame unstable, vulnerable to wind loading, or relying on connections that have not yet been made. The sequence is designed by the structural engineer and must be followed without deviation. This talk explains why the erection sequence matters and what every operative needs to know.
Key Hazards
Frame collapse from erecting steel members in an unplanned or incorrect order
Temporary instability during erection before bracing connections are completed
Wind loading overturning partially erected bays that lack permanent stability
Crane operations conflicting with erection activities due to poor sequence planning
Control Measures
Obtain and review the erection sequence drawing before the first steel is lifted on site.
Erect steelwork in the exact order specified — do not skip bays or advance ahead of the plan.
Install temporary bracing at every stage specified in the sequence before moving to the next section.
Confirm all permanent connections in each completed bay before erecting the next adjacent bay.
Monitor wind conditions and cease erection when speeds exceed the limits set in the method statement.
Brief the erection team on the day's planned sequence, connections, and bracing requirements.
Coordinate crane positions and lift plans with the erection sequence to avoid conflicts.
Record the actual erection sequence daily and note any deviations approved by the engineer.
Ensure the temporary works coordinator is informed whenever bracing or propping is part of the sequence.
Remember
Follow the erection sequence drawing exactly — do not skip bays or deviate from the plan
Install temporary bracing at every stage specified before moving to the next section
Confirm all permanent connections in each bay are complete before erecting the next bay
Monitor wind conditions and cease erection when limits in the method statement are exceeded
Brief the erection team on the planned sequence, connections, and bracing each morning
Record the actual sequence daily and document any deviations approved by the engineer
Applicable Legislation: CDM Regulations 2015 · BS EN 1090-2 (Execution of Steel Structures) · BS 5975:2019 (Temporary Works) · Health and Safety at Work etc. Act 1974