Lifting is the biggest risk: HR for precast concrete makers

A precast element is lifted more often than most owners count. The gantry takes it out of the mould. A forklift or crane moves it to the stack yard. Later it goes onto a trailer, and at the site a mobile crane swings it into place. Each of those moves hangs a heavy piece of concrete from a hook, with people standing nearby.

So when the precast concrete makers page puts lifting at the top of its strains, it is not talking about cranes as machines. It is talking about who hitches the sling, who gives the hand signal and who says the piece is ready to move.

• The wrong hitch. A choker used where a basket was needed, or one leg of a two-leg sling carrying most of the load.
• Tired or damaged gear. Wire rope with broken strands, a shackle pin replaced with a bolt, webbing slings with cut edges from a sharp concrete arris.
• Lifting points not used. Cast-in loops ignored because the crew finds it faster to wrap the sling round the element.
• Early stripping. A slab de-moulded and lifted before it has gained strength, so a corner or a loop pulls out.
• No single signaller. Two people waving at the crane operator, or nobody, when the piece swings near the stack.
• People under the load. Helpers steadying a panel with bare palms in place of a tagline, inside the swing zone.

Hardly any of these is a crane fault. Each is a habit picked up from whoever trained the person, often a senior who learnt on a site years ago.

Most precast yards hire helpers for concreting and curing, then pull the willing ones into rigging when the gantry needs hands. Nobody issues an authorisation. The gear register, if it exists, sits with the stores clerk. And because lifts happen dozens of times a day without trouble, the risk feels smaller than it is.

Project dates add pressure. When a builder wants hollow-core slabs on site by Friday, the yard is tempted to strip moulds early and load the trailer the same evening. The person best placed to say no is usually the most junior, and the person pushing is the project lead.

1. 1

   List every lift in the yard

   Mould to stack, stack to trailer, turning panels, loading drains. Note the gear and crane used for each, so training covers real lifts.

2. 2

   Name riggers and signallers

   Write down who may hitch and who may signal on each shift. Only one signaller per lift, wearing something the crane operator can see.

3. 3

   Train on your own elements

   Teach hitches, sling angles, lifting loops and taglines using the beams and slabs you actually cast. Assess each person on a real lift before sign-off.

4. 4

   Check gear at shift start

   Slings, shackles, hooks and spreader beams looked at by a named rigger, with a tag or mark for anything withdrawn. A short register sits at the gantry.

5. 5

   Separate the ready-to-lift call

   The quality inspector or a named senior signs that an element may be stripped and lifted, against its casting date and curing log. The project lead cannot sign it alone.

6. 6

   Reassess on a calendar

   Repeat the practical check for each rigger and signaller at a fixed interval, and after any near miss on their lift.

Who holds each of these duties belongs on a written duty sheet, the precast role descriptions. The point is to make authority visible. A helper who knows he is not on the rigging list has a reason to step back.

Shift and date.
Authorised riggers on this shift, with last assessment date.
Authorised signaller for this shift.
Crane operator on duty.
Gear checked this morning: slings, shackles, hooks, spreader beam.
Items withdrawn and tagged, with reason.
Elements cleared to strip and lift today, with signature of the inspector.
Near misses or abnormal lifts during the shift.
Signed by the shift supervisor at close.

The board is a daily habit, not a file for audits. Read it at the morning briefing and close it at shift end. The safety routine behind it, from gear checks to toolbox talks, is described on the precast health and safety page.

A rigging list only works if the yard supervisor backs it when the trailer is waiting. That takes a particular skill: telling the project lead the panels will go tomorrow, and explaining why, without a shouting match. Most precast supervisors were bar benders or shuttering carpenters, promoted for their trade. A short manager development programme on holding a safety line under pressure beats another lecture on crane parts.

Riggers and signallers carry the yard's worst risk, yet many are still paid as general helpers. Give them a named grade, an allowance once authorised and a route to rigging lead. Site contractors are always hunting for hands who can manage a suspended load. Comparing your rigger pay with nearby yards, through compensation benchmarking, tells you whether your best hands are underpaid for the trust you place in them.

• Ask the gantry crew who may rig today. If three people give three answers, start there.
• Pick up two slings and a shackle from the gantry and see whether anyone could say when they were last checked.
• Find the last element stripped under deadline pressure and see who agreed to the lift.
• Ask your erection team leader how riggers are chosen on site, away from the yard.
• Compare what your most trusted rigger earns with a concreting helper.

Lifting sits beside drawing control and scarce bar benders as the big people issues in precast. The building materials group overview shows how they connect. To plan the rigging list, grades and supervisor coaching for your casting yard, outline it for us through our enquiry page.