Exclusion zones are the only thing standing between a routine lift and a person under a swinging load. They are not just cones and tape; they are a controlled space that is defined, briefed and actively policed from set-up to hand-back. On busy UK sites with multiple trades overlapping, delivery traffic and shifting weather, a token barrier won’t survive the first hour. The discipline is to set the zone based on the real lift envelope and then keep it intact when the programme pushes and attention drifts.
TL;DR
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– Draw the zone from the actual lift envelope, not the crane’s footprint, and include the worst-case slew and load swing.
– Use solid barriers and marshals as the default; tape and signs on their own won’t hold a live zone.
– Lock interfaces: deliveries, pedestrian routes, scaffold access and nearby work at height must be paused or diverted.
– Brief who can enter, who can stop the job and how to escalate; keep radio channels clear and agreed.
– Treat hand-back as a step: only remove barriers after “all-clear” from the lift controller and a quick walk-through.
A staged playbook to set and hold lift exclusion zones
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Define the envelope and the no-go
Start with the lift plan and draw the true lift envelope on a scaled plan: crane radius, slew path, load path, landing area, and potential drop zone if a tag-line slips. Add a margin for wind-induced swing and operator error; this is a risk allowance, not a comfort blanket. Convert that drawing into a measured zone on the ground using spray, pins and chainage references so the team can see the lines before barriers go in.
# Build physical boundaries that withstand site reality
/> Default to solid, stable barriers that resist nudging and wind: pedestrian barriers, Heras panels, weighted Chapter 8 barriers. Keep tape for inner line-of-sight reinforcement, not the perimeter. Gate the entry point and staff it when live. Use clear, simple signs with the lift identifier (“Tower A steel lift – no entry except slinger/supervisor”). If the zone crosses a roadway, install a proper stop and divert route with banksmen and cones at taper lengths that make sense in the space you have.
# Lock down interfaces before the crane arrives
/> Walk the adjacent workfaces with trade leads the shift before the lift. Can scaffold access be paused? Is there a MEWP planned to work under the slew? Are deliveries booked through the same gate? Pre-empts like moving a skip, altering a pedestrian walkway, or pausing rebar tying for an hour typically save you from stand-offs once the crane is rigged and the clock is running.
# Brief roles, radios and the right to stop
/> Run a targeted briefing: appointed person, crane supervisor, slinger/signaller, traffic marshal, and any trade leads affected. Agree who controls the gate, which radio channel is primary, and what the stop-call is. Make it explicit that anyone inside the zone can halt the lift if they’re not happy. Visitors and unbriefed operatives simply don’t enter; treat the zone like a confined space from an access perspective.
# Operate the zone, not just the lift
/> During lifting windows, the supervisor’s eyes are on the perimeter as much as on the hook. Keep the gate attended, challenge drift, and reposition barriers if wind or plant movement shifts them. Manage the temptation to “just nip through” with confident, consistent language. If the programme demands overlapping access, split the work into windows and announce them; don’t attempt partial barriers with people working directly beneath the slew.
# Hand back with a positive confirmation
/> When the last load lands and the hook is parked, hold the zone until the crane supervisor confirms all is safe and the load path is clear of residual hazards (straps, sharp edges, debris). Walk the area with the traffic marshal, remove temporary controls methodically, and reinstate normal routes. Update the site board if the lift sequence continues the next day so people don’t assume the route is permanently reopened.
A site-day scenario: where the zone saved the shift
/> On a mixed-use refurbishment in Manchester city centre, a mobile crane is set to lift plant to a roof. The exclusion zone runs across a busy loading bay and clips the pedestrian route to the welfare cabins. At 09:15, a delivery artic arrives unannounced and tries to nose into the bay, nudging a barrier and asking to “just tip quick”. The traffic marshal holds the line and diverts the truck to a holding area agreed at the pre-start. Ten minutes later, a roofer attempts to access the scaffold stair within the zone for a tape measure he’s left. The gate marshal stops him, and the crane supervisor pauses the lift for one minute while a slinger retrieves the item. The lift completes in sequence, and normal routes reopen at 10:30. Without the manned gate and the holding area, the lift would have been compromised or stopped in a standoff with logistics.
Supervisor prompts: before and during the lift
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– Walk the full lift envelope and mark the outer line with spray or pins before barriers go in.
– Relocate any pedestrian route or scaffold stair that falls inside the zone; don’t rely on “mind the lift” briefings.
– Position a staffed gate with a clear view line to the hook and the landing area; confirm radio handsets are charged and on the agreed channel.
– Stand down adjacent noisy or distracting tasks during the live window so slingers and marshals can hear calls.
– Verify wind conditions against the plan’s limits and reassess the margin if loads have large sail areas.
– Confirm a holding area for unexpected deliveries, with contact numbers posted at the gate for quick coordination.
Where lift zones fail in practice: common mistakes
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Drawing the zone from the crane feet, not the load path
Basing the barrier on outriggers ignores the true risk area. People end up walking under the hook because the lift slews over a live route.
# Leaving tape as the only control
/> Tape flutters and gets moved for convenience. By mid-morning the zone is a suggestion, not a boundary.
# Assuming everyone heard the briefing
/> Subcontractor swaps and late starters miss the talk. Unbriefed people then test the zone at the worst time, mid-lift.
# Letting logistics bend the rules
/> A “quick tip” or a “two-minute pass” destroys the perimeter. Once one vehicle’s allowed through, the zone loses credibility.
Keeping momentum without drift
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Tighten the lift zones this week: five moves
– Map near misses from recent lifts and physically adjust zone size or position where pressure points showed up.
– Re-site one pedestrian route permanently if it crosses regular slew paths, even if it means extra barriers and signage.
– Brief delivery partners and the gate team on a firm holding procedure, including where drivers wait and who authorises access.
– Deploy a second marshal during high-traffic periods and rotate them to keep concentration high.
– Close out each lift with a two-minute huddle capturing any encroachments and a single action to prevent a repeat tomorrow.
Bottom line on exclusion zones
/> Exclusion zones work when they’re designed from the real lift envelope, built to resist daily site pressures, and actively guarded by people with the authority to say no. If the boundary relies on tape and goodwill, it won’t last the morning. The next tightening we’ll likely see on UK sites is greater scrutiny on interface control and lift briefings that genuinely cover site logistics. Three questions to take to your next pre-lift: where will people try to cut through, who is manning the gate, and what’s our plan for the unbooked delivery?
FAQ
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How big should an exclusion zone be for a lift?
Start with the lift plan and draw the area the load will travel through, including its worst-case swing, plus a sensible margin. Consider wind, tag-line control and the potential for mis-slew. If you are unsure, err on the side of making the zone larger and refining it after a dry run.
# Can other trades work inside the zone if they’re not directly under the hook?
/> As a rule of good practice, keep all non-lift activity out during live operations. Even if they are off to the side, distractions and unexpected movements complicate communication and increase risk. Split the programme into windows so adjacent tasks can proceed when the hook is parked.
# Do I need a permit for every lift to enforce the zone?
/> Many UK sites use a simple permit-to-lift or authorisation step tied to the lift plan. It’s a practical way to control who can start a lift and confirm that the zone, radios and briefings are in place. Keep it proportionate for repetitive low-risk lifts, but don’t skip the point-of-work confirmation.
# What should the gate marshal focus on?
/> The marshal should control entry, maintain sightlines to the hook or communicate with the slinger, and challenge anyone attempting to pass through. They should keep the agreed radio channel clear, log any encroachments, and know the escalation route if someone refuses to comply. Rotating marshals helps avoid fatigue and complacency on longer lifts.
# How do we handle unplanned deliveries during a lift?
/> Have a designated holding area and a clear instruction at the site gate that no vehicles enter the exclusion zone during lifting windows. The traffic team should know who can authorise a delay or re-sequence the lift if the delivery is business-critical. Good coordination the day before reduces surprises, but the holding plan is your safety net.
