STE/Specific/TBT-STE-018
Temporary Bracing and Frame Stability
Steel Erection › Specific › Temporary Bracing and Frame Stability
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Temporary Bracing and Frame Stability
A steel frame is at its most vulnerable during erection before permanent connections, floor decking, and cladding provide full structural stability. Temporary bracing holds the frame in position and prevents progressive collapse. Premature removal of bracing, failure to install it in the correct sequence, or using underrated components has caused fatal frame collapses on UK construction sites. Every operative working on or near a steel frame must understand the critical role of temporary bracing.
Key Hazards
Progressive frame collapse from inadequate or missing temporary bracing
Individual column or beam instability before permanent connections are made
Wind loading on the partially erected frame exceeding the bracing design capacity
Unauthorised removal of bracing elements by other trades needing access
Control Measures
- Install temporary bracing strictly in the sequence specified in the erection method statement.
- Ensure all bracing connections are made to the designed specification before releasing the crane.
- Never remove or alter any temporary bracing without written approval from the structural engineer.
- Monitor wind speed continuously and stop erection if it exceeds the limits in the bracing design.
- Inspect all bracing connections at the start of each shift for tightness and condition.
- Brief all trades working near the steel frame on the bracing locations and the prohibition on removal.
- Ensure bracing components are the correct specification, not substituted with lighter alternatives.
- Maintain the temporary works register showing the status of every bracing element.
- Obtain formal sign-off from the engineer before any bracing is removed during the permanent works.
Remember
- Temporary bracing is the only thing preventing the steel frame from collapsing during erection.
- Removing or loosening a single bracing member can trigger a progressive collapse of the entire frame.
- Bracing must be installed in the correct sequence as specified in the method statement.
- Wind is the most significant loading on a partially erected frame and must be monitored constantly.
- No trade may remove temporary bracing for access without the structural engineer's written approval.
- Bracing components must be the exact specification in the design — substitutions are not permitted.
Applicable Legislation: CDM Regulations 2015 · BS 5975 (Temporary Works) · BS EN 1090 (Execution of Steel Structures) · Health and Safety at Work etc. Act 1974
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