Steel erection is a high-risk activity combining working at height, heavy lifting, and the inherent instability of partially connected structural frames. Steel members are heavy, awkward, and affected by wind. The structure is at its most vulnerable during erection before permanent connections and bracing are completed. Falls from steelwork, dropped members during lifting, and frame collapse from inadequate temporary bracing have all caused fatal incidents on UK sites.
Key Hazards
Falls from height during connection work on partially erected steelwork
Frame collapse from inadequate temporary bracing during the erection sequence
Crush injuries from steel members swinging or being dropped during lifting
Hand injuries from bolt-up operations and sharp steel edges
Control Measures
Follow the approved erection sequence and method statement without deviation at any stage.
Install temporary bracing as specified in the design before releasing any member from the crane.
Ensure all steel erectors are trained, competent, and wearing full fall arrest harnesses where required.
Use tag lines to control steel members during lifting and prevent uncontrolled swinging.
Establish exclusion zones beneath all lifting and erection activities with physical barriers.
Inspect all lifting accessories, bolts, and connection equipment before each shift.
Monitor wind speed continuously and stop erection work when limits specified in the plan are reached.
Ensure adequate anchor points are available for harness attachment before commencing connection work.
Brief all erection team members on the lift plan, sequence, and their specific responsibilities.
Remember
Steel frames are most vulnerable during erection — temporary bracing must be installed immediately.
The erection sequence in the method statement exists to maintain structural stability at every stage.
Fall arrest harnesses are essential for steel erectors and must be attached to rated anchor points.
Wind is the biggest variable in steel erection and has caused numerous frame collapses.
Exclusion zones beneath lifting and erection must be maintained to protect ground-level workers.
Never release a steel member from the crane until it is secured with the specified temporary connections.
Applicable Legislation: CDM Regulations 2015 · Work at Height Regulations 2005 · LOLER 1998 · BS 5975 (Temporary Works)