Exclusion zones around lifts exist for one reason: if something goes wrong, no one should be in the firing line. Too many sites rely on a few cones and a shouted warning. That’s not good enough when you’re swinging loads over walkways, laydown areas, or busy slabs. The aim is to design the zone, control the boundaries, and hold the line from planning through to stand-down. Do that routinely and the crane can work without surprises, even when the weather or programme tightens.
TL;DR
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– Map the load path and mark a physical no-go zone that accounts for slewing, drift and error.
– Use solid barriers and dedicated marshals; tape alone doesn’t hold under pressure.
– Brief the team on entry controls, radio calls, and stop points before the first pick.
– Keep the zone live only while the lift is live; reopen methodically once the hook is parked.
– Record deviations and near-misses; adjust the plan rather than rely on luck.
The playbook: build and hold a proper lifting exclusion zone
# Stage 1: Design the zone, not just the lift
/> Before kit is even on the hook, set out the load route and a buffer that assumes small mistakes. Plot the radius, obstructions, and any oversail of public or third-party areas. Agree the zone footprint at ground and any levels below or above the path. Good practice is to have the Appointed Person and Lift Supervisor confirm this against the lift plan and current site layout, including changes since the plan was written.
# Stage 2: Map vertical and horizontal risk
/> Lifts don’t only drop straight down. Loads can swing, tag lines can snag, and wind can drift the hook. Protect the space under, beside and beyond the arc. Mark out floors below open edges, stair cores, and scaffold lifts that could take debris if a load strikes. Where the load passes over traffic or public space, escalate controls and consider timed closures rather than hoping for a clear run.
# Stage 3: Choose boundaries that resist pressure
/> Plastic tape won’t stop a labourer with a wheelbarrow on a deadline. Use solid barriers, fence panels, lockable gates and weighted bases. Put signage at eye level at every entry point — “No entry: live lift zone.” Where access must be possible (e.g., fire routes), agree a controlled crossing procedure with a banksman holding radio comms with the Lift Supervisor.
# Stage 4: Control who’s in and who’s out
/> One person owns the boundary during the lift — typically the Lift Supervisor — but marshals hold the line at the edges. Brief the slinger/signaller, crane operator, and marshals on exactly who is allowed inside and for what tasks. If someone must enter to secure a load or manage tag lines, they do so on the Supervisor’s word, via radio, and for as short a time as required. Everyone else stays out, no exceptions.
# Stage 5: Run the lift with predetermined stop points
/> Lift only when the zone is clear and confirmed. Use agreed radio calls to start, pause, and stop, and set hold points where visibility is compromised. Apply weather hold points — especially for panel, rebar cage, or formwork lifts — with wind as a go/no-go factor. If the boundary is breached, stop the lift, make safe, and reset the zone before continuing.
# Stage 6: Stand down and reopen deliberately
/> A lift isn’t finished when the load touches down. Keep the zone closed until the hook is parked and the area is proven free of residual hazards such as loose fixings, sharp edges, or pinch points. Remove barriers in a controlled sequence and note any deviations from plan. Feed learning back into the next lift brief — don’t leave it to folklore.
Scenario: mobile crane pick over a live housing plot
/> It’s a timber-frame install on a tight residential site. A 70‑tonne mobile crane sets up on the road with outriggers on certified mats. The load path crosses a scaffolded plot entrance and a pedestrian desire line to welfare. The initial plan shows cones and tape, but the morning briefing reveals a delivery due at the same time and scaffolders working on lift three. The supervisor increases the zone to include the scaffold bay beneath the load path, replaces tape with barrier panels, and re-routes pedestrians via a signed detour. During the lift a resident approaches the gate; a marshal halts them, radios “zone compromised,” and the operator holds until the gate is closed. The pick completes, barriers stay up until the hook is stowed, and the team logs the pedestrian interface as a learning point.
Supervisor checklist: before any lift starts
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– Confirm today’s zone matches the live site — layout, trades, public interfaces and weather.
– Walk the entire boundary; replace tape with rigid barriers where people might push through.
– Verify marshals and slinger/signaller have working radios and a single agreed channel.
– Mark and brief controlled crossing points; close them during actual movements.
– Clear lower levels and openings directly below the load path; protect with signage and barriers.
– Set weather and visibility hold points; state who makes the stop call and on what trigger.
– Record the brief; ensure agency and late arrivals are captured and understand the rules.
Common mistakes
# Eyeballing the radius
/> Guessing the arc of the load or the crane’s tail swing leaves blind spots. Plot it precisely and add a buffer for human and wind error.
# Relying on cones and hope
/> Cones and barrier tape don’t withstand programme pressure. Use physical barriers with clear signage and put people on the gates.
# Letting “just one person” through
/> Allowing ad-hoc crossings normalises risk. If you must cross, do it under radio control with the lift paused.
# Forgetting the level below
/> Debris and dropped tools don’t vanish. Protect zones on levels beneath and behind hoardings where people may be out of sight.
Immediate actions to strengthen boundary control
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This week: harden lifting boundaries in five moves
– Map the next three lift routes on a plan and spray-mark the exclusion footprints on deck.
– Swap any tape-only boundaries for rigid panels with lockable gates at entry points.
– Assign a dedicated marshal for each zone edge that interfaces with pedestrians or traffic.
– Introduce a go/no-go radio script with named hold points, then practise it once before first pick.
– Add a simple breach log to the lift pack; review entries at the end of the shift and fix the causes.
Bottom line on exclusion zones
/> If you can keep people out of the drop and swing zone, most lifting incidents become property damage rather than life-changing. Treat the boundary like a temporary work: designed, installed, inspected, altered only by the competent team. Watch for creeping tolerance, especially as shifts change and programmes compress. The next enforcement focus is likely to be on planning quality and real-world control at interfaces, not glossy plans sitting in the cabin.
FAQ
# How big should a lifting exclusion zone be?
/> There’s no single size that fits every lift. Map the load path and add a sensible buffer for swing, drift and tail swing, then consider what’s below and beside. Adjust for the specific load type, weather, and proximity to the public.
# Can we keep welfare and site access open during a lift?
/> Only if you can maintain control without relying on chance. Create a signed diversion and keep welfare routes outside the zone where possible. If you need a controlled crossing, pause the lift and use a marshal with radio control.
# What if a subcontractor refuses to respect the barrier?
/> Stop the lift and escalate to the Site Manager or Principal Contractor representative. Re-brief the area, confirm the rules with the subcontractor lead, and don’t restart until the boundary is respected. Repeated breaches should trigger formal action and a review of coordination.
# Do we need a permit for every lift?
/> Many sites use a permit-to-lift or daily authorisation as part of their safe system. The important point is that each lift is planned, briefed, and authorised with today’s conditions checked. Keep it practical: a short, live document beats a perfect plan that no one reads.
# How do wind and weather affect exclusion zones?
/> Wind can increase swing and drift, so your buffer may need to grow or the lift be postponed. Rain and poor light reduce visibility and make barriers and signage less effective. Build weather hold points into the brief and give the Lift Supervisor clear authority to call it off.
