Boom Lift / AWP Operator — Certification Prep

Introduction

A boom lift does the thing a scissor lift cannot: it reaches. It puts a basket out over a stage, a set, a pit or a row of seats, twenty metres up and ten metres sideways, and it does that by deliberately putting a person outside the machine's own footprint.

Everything that makes it useful is also what makes it dangerous. The weight goes outside the wheels, so it can tip. The basket swings, so you can be thrown out of it. The boom can push you into a beam, and if you are pinned against that beam holding the joystick, the machine will keep pushing.

This book teaches the machine, the load chart, the ground under it, the harness rule that is genuinely different from a scissor lift, the entrapment accident that defines this machine, and what the standards ask for.

This Book Cannot Certify You

Operating a boom lift requires training and an evaluation on a real machine: general theory, a knowledge evaluation, familiarisation with the specific machine, and a practical evaluation by a qualified person. None of those four happens in a book.

Read this to arrive at that training already knowing the machine, and to recognise on a show floor when something is wrong. Until you are trained, evaluated and authorised, the honest answer to "take the boom up and sort that out" is that you are not trained for it.

How to Use This Book

Read it in order. The chapters on stability and on entrapment describe how people actually die on these machines. Every chapter ends with a reference table, a procedure, a failure table written symptom first, an exercise and a checklist.

Keep a notebook

Log the pre-use inspection by unit number and date, and write down what you found rather than that you looked. Booms carry more systems than a scissor — the turntable, the boom sections, the levelling of the basket, the secondary guarding — and a fault noticed twice is a fault you can get taken off the job.

Write down the anchor point you clipped to in the basket and what you clipped with. In a boom you wear a harness with a lanyard short enough to keep you in the basket, attached to the manufacturer's anchor — not to the guardrail, and not to something outside the machine.

Note the wind. These machines have a maximum wind speed on the plate, commonly 12.5 m/s (28 mph), and outdoors that number arrives without warning. An anemometer reading written down at the time is the difference between a judgement and an argument.

A note on the words

Two families, and the crew names them by shape. A telescopic boom — the straight stick — goes out and up in a line. An articulating boom — the knuckle boom — bends, so it can reach up and over an obstruction. Both are Group B machines in the ANSI A92 family, and both are called "a boom", "a manlift", "an AWP" or "a cherry picker" depending on who is speaking.

The controls have two names too. The platform controls are the ones you use. The base controls, or ground controls, are for bringing somebody down who cannot bring themselves down, and everybody on the crew should know where they are before anybody goes up.

A note on safety

In a boom the fall hazard is not falling out of the basket so much as being thrown out of it. A boom that catches its basket on structure and then releases will catapult the occupant — this is why the harness and lanyard in a boom are restraint, keeping you inside, rather than arrest, catching you after. OSHA has not accepted a body belt for fall arrest since 1 January 1998, and a full body harness is what you will be handed and what you should expect to wear.

The other hazard comes from above and behind. Crushing an operator between the basket rail and overhead steel is common enough that manufacturers now sell secondary guarding for it — JLG's SkyGuard, Genie's Lift Guard, Snorkel Guard, Skyjack's Secondary Guarding, Niftylift's SiOPS. Treat a machine that has it as a machine that still needs you to look up.

This book prepares you for training and evaluation. It is not that training, and no book can watch you operate a boom.

Where this book sits

This book assumes you have read Scissor Lift Operator — Certification Prep, or that you already know what is in it.

Experience counts instead. If you have time on load-ins where boom lifts are used and you have held the ground, watched the basket and seen how differently the machine behaves, start here.

If none of that is true yet, read Scissor Lift Operator — Certification Prep first.

What pairs with this

• Personal Fall Arrest Systems (PFAS) — Certification Prep — the harness worn in the basket, and why it is restraint

Where it leads

These are not steps in an order. Take whichever one fits.

• Advanced Rigging — the rigging the machine usually exists to reach
• Staging & Crew Chief — running a floor that machines and crews share

Boom Lifts & AWPs

Start with the machine and with the one fact that everything else follows from: a boom lift puts the platform outside the wheels.

Machines that lift workers to height.

Working at height with lifts

A boom lift -- also called an aerial work platform, a cherry picker or, in the standards, a Group B mobile elevating work platform -- lifts a basket on an arm rather than on a vertical stack. That arm can extend out sideways as well as up, which is the entire point of the machine and the source of every rule in this book.

Group A machines like scissor lifts keep the platform inside the tipping line: the weight stays over the wheels. Group B machines deliberately put it outside. Stability then depends on counterweight, on the machine's geometry, on the ground under it and on the operator staying inside a defined envelope.

That is why a boom lift has a load chart, why it often has outriggers, why it needs level firm ground, and why it is the one machine where the harness is not optional.

The hazards of lifts

Five patterns, and they are not the same five as a scissor lift. Tip-over, because the weight goes outside the wheels. Being thrown from the basket, because the boom can move suddenly or be deflected. Entrapment and crushing, where the operator is pinned between the basket and structure with the controls still held. Struck-by and tail swing on the ground. And stranding, where the machine stops with the basket high and far out.

Each has a specific answer, and the rest of this book is those answers.

The three families

• Telescopic boom, the straight stick: a single boom that extends straight out. The greatest reach and the least ability to get around anything in the way.
• Articulating boom, the knuckle boom: jointed sections that fold, so the basket can go up and over an obstacle and come back down the other side. The AV favourite, because sets and staging are in the way.
• Trailer-mounted and towable: a light machine towed behind a van, set on outriggers. Common in smaller venues, corporate rooms and houses of worship.

All three are Group B, all three follow the same rules, and all three have their own manual that outranks any generalisation in this book.

Where AV uses them

• Reaching over a stage, a set or a pit that a scissor lift cannot drive on to.
• Arena roof and catwalk access where there is no house route.
• Rigging and focusing where the position is out over seating.
• Outdoor stages, festival sites and anything on grass or gravel.
• Banner, drape and signage work in large halls.

In every one of those cases the machine was chosen because it can reach over something. That something is usually also what makes the rescue plan and the ground assessment harder.

The parts of the machine

• Chassis and drive: wheels or tracks, and the counterweight.
• Turntable: the rotating base the boom sits on, which is what makes tail swing possible.
• Boom sections: telescopic or articulating, sometimes with a jib at the end for fine positioning.
• Basket or platform: with rails, a gate, a control box and the designated anchor points.
• Base controls: the station at ground level that overrides the platform.
• Auxiliary power: a secondary system that can retract and lower the boom when the main engine or battery fails.
• Outriggers or stabilisers, on the machines that have them.

Group A against Group B

The class of the machine decides the rules that apply to it.

Three families, compared

AV uses all three, for different reasons.

How to do it

1. Identify which family it is and what that means for reach and setup.
2. Find the plate and the load chart, and read both.
3. Identify the base controls, the auxiliary power and the emergency descent.
4. Find the designated anchor points inside the basket.
5. Ask who is trained, authorised and familiarised on this machine.
6. Do not operate it until that familiarisation has happened.

What goes wrong

Practice it

With a machine on site.

Reach, Capacity and the Envelope

A scissor lift has a capacity. A boom lift has a chart, because what it can carry depends on how far out you have gone.

The plate and the basic numbers

The plate gives the rated capacity, the maximum number of occupants, the maximum platform height, the maximum horizontal reach, the wind rating and the slope the machine may be driven and operated on. As with any machine, if the plate is missing or unreadable the machine does not get used.

Capacity counts everybody and everything in the basket: people in boots, tool belts, a fixture, a drill, a coil of cable. Baskets are small and it is easy to be at the limit without feeling heavy.

The load chart, and why capacity falls with reach

Extending the boom moves the load away from the machine and multiplies its leverage on the chassis. To stay stable, the machine has to carry less the further out it goes -- exactly like holding a weight at arm's length rather than against your chest.

The load chart, usually a decal on the turntable or in the basket, shows this as an envelope: an unrestricted zone close in where the full capacity applies, and a restricted zone further out where capacity drops, often to one person and no materials.

Many machines enforce it. Platform load sensing and envelope control will cut functions, sound an alarm, or refuse to extend further when the combination of load and reach leaves the envelope. That refusal is the machine doing its job.

Wind, and the rating on the plate

Wind matters more on a boom than on anything else in this series, because the basket is high, far out, and on the end of a lever. The plate carries the machine's wind rating, commonly 28 miles an hour for a wind-rated MEWP, and wind at platform height is stronger than the breeze you feel on the ground.

Anything that catches wind makes it worse. A banner, a sheet of ply, a drape or a large panel in the basket is a sail on the end of a long arm, and the standard treats carrying them at height as its own hazard.

Measure rather than guess. A handheld anemometer costs less than an hour of crew time, and on an outdoor stage somebody should have one and be reading it.

Reach, and what is underneath it

The reason to hire a boom is to get out over something: a stage, a set, a pit, seating, a water feature, a truck. That something is underneath the basket and sometimes underneath the boom, and it changes both the rescue plan and who must be kept out of the way.

Before extending out over anything, ask what is below, who is below, whether a rescue machine could reach the basket where it will be, and whether anything can be dropped from the basket onto what is underneath.

The numbers on a boom lift

More than a scissor lift, because reach changes the answer.

Inside and outside the envelope

Read the chart before planning the position.

How to do it

1. Establish the height and the horizontal reach the work actually needs.
2. Weigh or estimate the people, tools and materials going up.
3. Read the load chart for that reach, not just the plate.
4. Confirm the combination sits inside the unrestricted zone if you can.
5. Check the wind rating and measure the wind if outdoors.
6. Ask what is under the basket and under the boom.

What goes wrong

Practice it

With a real machine and a real job.

Safe Setup & Stability

Everything about a boom lift's stability comes back to the ground it stands on and the discipline of setting it up properly.

Set up the lift safely so it won't tip.

Inspection and setup

The pre-use inspection is the same discipline as any MEWP: tyres or tracks, hydraulic hoses and cylinders, boom sections and wear pads, the turntable, the basket, its rails, gate and anchor points, the outriggers and their pads, decals and the plate, fluids and the battery.

Then the function test: from the base controls first, then from the platform. Raise, extend, rotate, drive and steer. Test the emergency stops at both stations, the horn and alarms, the tilt alarm, and the auxiliary power -- the one that will matter if the machine dies with the basket out.

Setup follows: position the machine, deploy outriggers or stabilisers onto firm ground with pads, and confirm the machine is level before the boom comes off its rest.

Stability and tip-overs

A boom lift tips when the combined centre of gravity leaves the footprint defined by its wheels or outriggers. The ways that happens are specific: driving elevated over slope or a hole, extending beyond the envelope, operating on ground that gives way, wind on a raised basket, an outrigger not deployed or set on soft ground, and side-loading -- pulling or pushing something with the basket.

Side-loading deserves its own sentence, because it does not feel dangerous. Dragging a cable, pushing a truss into position or pulling on a fixture applies a horizontal force at the end of a long lever, and the machine was not designed for it.

The tilt alarm is not advice. If it sounds, stop, retract, lower and re-establish the setup. Continuing because the work is nearly finished is how the reports begin.

Ground conditions and what is under the slab

A boom lift concentrates a great deal of weight into a small number of contact points, and when the boom swings the loading moves. What matters is not just whether the ground looks solid but what is under it: basements, service voids, drains, cellars, backfilled trenches, and the loading dock edge.

Outdoors on a festival site the answers are worse -- soft ground, rain, buried services and temporary trackway. Outriggers get pads, pads get bigger than you think they need to be, and somebody with authority confirms the ground will take it.

Indoors, ask the venue about floor loading before driving a boom lift on to a stage, a sprung floor, a raised platform or anything over a void.

Tail swing and the ground crew

The turntable rotates, which means the counterweight behind the machine sweeps a circle. People standing behind a boom lift are standing in the path of several tonnes of steel that gives no warning.

This is a specific reason for an exclusion zone around the whole machine rather than just in front of it, and for a ground person on a busy show floor. The operator is looking at the work, twelve metres away and above.

What takes a boom lift over

Six causes, all of them preventable at setup.

How to do it

1. Inspect the machine and function test from both control stations.
2. Test the auxiliary power before the boom leaves its rest.
3. Assess the ground, including what is under it, and confirm floor limits.
4. Position the machine allowing for tail swing and for the rescue route.
5. Deploy outriggers onto pads and confirm the machine is level.
6. Set an exclusion zone around the whole machine, not just the front.

What goes wrong

Practice it

On a real setup.

Fall Protection & Safe Operation

This is the chapter where a boom lift differs most from a scissor lift, and where the difference is a legal requirement rather than a policy.

Tie off and operate within limits.

Fall protection in a lift

In an aerial lift, a harness is worn and a lanyard is attached to the boom or the basket. That is the rule, it applies at any height, and it is not conditional on how high you are going or how long you will be up there.

What is worn has changed over time. Body belts have not been acceptable as part of a fall arrest system since the start of 1998, and current practice is a full body harness with a short lanyard. A belt may still appear in restraint or tethering arrangements, but on a show site the harness is what you will be handed and what you should expect.

The lanyard is short on purpose. It is there to keep you in the basket, not to catch you outside it.

Operating safely within limits

• Both feet on the basket floor. Never climb on or sit on the rails.
• Never add a ladder, step or case in the basket to gain height.
• Gate closed and latched; nothing propped in the opening.
• Move the controls smoothly; a boom amplifies every jerk at the basket.
• Never pull, push or drag anything with the machine.
• Keep the basket tidy; anything dropped lands a long way away.
• Watch the whole machine, not just the basket -- boom, turntable and tail.
• Come down and reposition rather than reaching for the work.

Smoothness deserves a note. A movement that feels small at the controls is a large, fast movement twelve metres out on the end of a boom, and that is the movement that throws people against rails and into structure.

Why the tie-off is restraint rather than arrest

This is the part people get wrong, and understanding it changes how the equipment is rigged.

Guardrails stop a standing person casually falling over the edge. They do nothing about the thing that actually throws people out of baskets: a sudden jolt. The boom is deflected by structure and springs back, the machine is struck by a vehicle, a control is moved hard, the basket catches and releases. The person is launched upward and outward over the rail.

The lanyard is there so that cannot happen: short, attached to the machine's designated anchor, holding you inside the basket. That is restraint. A long lanyard with an energy absorber, which is correct for arrest on a structure, is wrong here -- it would let you leave the basket before it did anything.

Anchoring to the basket, never to the structure

Attach only to the designated anchor points provided in the basket. Never belt off to adjacent structure -- the truss you are working on, a beam, a catwalk handrail, a pipe.

The reason is brutal and simple. If the machine moves, drifts, tips or is driven while you are attached to the building, the basket leaves and you do not. People have been pulled out of baskets exactly this way.

The same logic bans climbing out of the basket at height onto a structure unless the machine, the site and your training all specifically permit and plan it, with its own fall protection.

The harness rule, compared

The two machines genuinely differ, and crews mix them up.

What throws people out of baskets

None of these is a fall in the ordinary sense.

How to do it

1. Put on a full body harness and check its fit before entering.
2. Enter the basket and close and latch the gate.
3. Clip the short lanyard to the designated anchor point in the basket.
4. Keep both feet on the floor and your body inside the rails.
5. Move the controls smoothly, especially at reach.
6. Reposition the machine rather than reaching for the work.

What goes wrong

Practice it

With a machine on site.

Entrapment and Crushing

This is the accident that defines boom lifts, and the one that most surprises people who have only worked with scissor lifts.

How entrapment happens

The operator is working close to structure -- a roof beam, a catwalk, a truss, a doorway, a low ceiling. The boom moves them into it, or they move it, and they are caught between the basket rail or the control console and something solid above or beside them.

Incidents have happened while driving, while moving into a position, and while working at height near obstructions. The machine is powerful and precise, and it will keep applying that power against a beam.

Sustained involuntary operation

This is the phrase the industry uses for the worst version, and it is worth knowing because it explains why the accident is fatal rather than painful.

If the operator is pushed onto the control console by an overhead obstruction, their own body holds the joystick over. The machine continues the movement that is crushing them, and it continues until something gives way. A person in that position cannot release the control, because the control is what they are being pressed against.

That is why the answers are engineering and attention rather than strength or presence of mind.

Secondary guarding devices

Manufacturers responded with devices that detect the operator being pressed against the controls and stop or reverse the machine. They usually take the form of a pressure-sensitive bar or cable above the console. When something presses it, the machine stops, an alarm sounds, and on some systems the movement is briefly reversed.

They are sold under names worth recognising on a hire list: JLG's SkyGuard, Genie's Lift Guard Contact Alarm, Snorkel Guard, Skyjack's Secondary Guarding System, and Niftylift's SiOPS, which was developed after regulators raised concerns about crushing deaths on these machines.

Ask for a machine with one. It costs nothing to specify at the point of hire, and it is the only control in this chapter that works when attention has already failed.

Attention, planning and the ground

The habits are the same as everywhere else in this series and they matter more here. Know what is above and beside the basket before you move it. Move in stages and look before each one. Approach structure slowly and stop short of it. Position the machine so you work away from obstructions rather than into them.

And keep somebody on the ground who is watching the basket rather than the job, who knows the base controls, and who is close enough to use them. In an entrapment, the person at the base station is the rescue.

Getting somebody down

The base controls override the platform and can retract and lower the boom. Auxiliary power will do the same when the main power has failed. Both are on the machine, both are used from the ground, and both need to have been shown to the crew before the boom went up.

A rescue plan names the method, the equipment, the people, the access and the time. On a boom lift the access part is not a formality: a basket high and far out over a set may be unreachable by another machine, and that has to be known before the work rather than during it.

Why entrapment is different

It is not a fall, and presence of mind does not fix it.

Secondary guarding, by name

Specify one at the point of hire.

How to do it

1. Identify everything above and beside the intended basket position.
2. Plan the approach so you work away from obstructions, not into them.
3. Post a ground watch who knows the base controls and stays near them.
4. Move in short stages, looking before each one.
5. Stop short of structure and reposition rather than squeezing in.
6. If contact happens, the ground watch uses the base controls immediately.

What goes wrong

Practice it

Before the next boom lift job.

Driving, Travelling and Loading

A boom lift spends part of its life being moved rather than worked, and the moving is where a surprising share of the damage happens -- to the machine, to the venue, and to people walking past.

Driving with the boom raised

Many boom lifts can be driven from the platform while elevated, and the rule for doing it is the same as for every other machine in this series: only where it is genuinely necessary, only over ground that has been checked, only slowly, and only with somebody watching the wheels.

Raised, the machine is tall and its weight is out on a lever. A slope, a cable ramp, a floor pocket, a drain or a soft patch is no longer a bump but a tipping force, and the drive speed cut-out exists because the manufacturer knows that.

The regulator is explicit that an aerial lift must not be moved with somebody in an elevated platform unless the machine is designed for it. On most AV jobs the honest answer is to bring the boom in and down and drive the machine, which takes a minute.

The route, and what is above it

Driving a boom lift through a venue is a path problem in three dimensions. The machine is wide, long, heavy, and stowed it is still tall. Doorways, corridors, ramps, thresholds, floor limits, turns and the height of the roller door all decide whether the route works.

Look up on the route too. A stowed boom clears less than people assume, and low pipework, lighting bars, sprinkler heads and door frames are all things a machine has been driven into on a load-in.

Walk the route first, move anything that has to move, and have somebody walk ahead of the machine on a busy floor.

Rough terrain and outdoor ground

Rough terrain machines exist because festival sites are not car parks. They have larger tyres, more ground clearance and often four-wheel drive, and they are still limited by what the ground will carry.

Wet grass, fresh backfill, trackway edges, cable crossings and the lip where hardstanding meets field are all places machines get stuck or tip. Drive across a slope as little as possible, keep the boom stowed, and get a machine towed out rather than driven out when it bogs in.

Loading, unloading and transport

Getting the machine on and off a truck or trailer is a serious operation on a slope, usually done at the end of a long day by tired people in a car park.

Use the machine's own loading procedure from its manual, keep everybody clear of the ramp, and never let anybody stand below or beside a machine being driven onto a trailer. Chain or strap it down at the manufacturer's tie-down points, with the boom stowed and the turntable locked.

Then check the route home: overall height matters on a trailer as much as it does in a corridor.

Moving the machine

The default answer is boom stowed and down.

How to do it

1. Bring the boom fully in and down onto its rest.
2. Walk the route, checking width, height, floor limits and turns.
3. Move or flag anything on the route that cannot be driven over.
4. Have somebody walk ahead on a busy floor and watch the wheels.
5. Drive slowly, and stop rather than squeeze through anything tight.
6. Park clear of exits, fire routes and other departments' working areas.

What goes wrong

Practice it

At your next venue.

Boom Lifts on a Show

What changes when the site is a show: the room is shared, the air above you belongs to the riggers, and outdoors the weather has a vote.

Reaching over a stage or a set

The reason a boom was hired is usually that something is in the way, and that something is expensive, fragile, or full of people later. Scenery, LED wall, a sprung stage, a pit, seating, a water feature.

Before extending out over it, agree what is underneath, get the people out from under, and control what can drop. Tether tools, keep the basket tidy, and take nothing up that does not need to be up there.

Then remember the machine itself: the boom passes over things at a lower height than the basket, and a boom swinging through a lighting position or a set piece does more damage than anything you could drop.

Working with riggers overhead

AV boom work often happens directly in the air a rigging crew is using. Motors run, truss moves, and a basket parked under a moving load is the worst place in the venue.

Coordinate before the boom leaves its rest. Find out when motors are running and where, and agree that nobody works under a moving load. When the riggers call motors, the basket comes out of that air -- not later, then.

Talk on the radio the riggers are actually using, and make sure the ground watch has one too.

Wind, weather and outdoor stages

Outdoor AV work is where boom lifts meet their limits. A festival site adds wind on a raised basket, soft ground that changes with the rain, buried services, trackway, and vehicles moving in the same field.

Somebody should be measuring wind rather than estimating it, and the decision to come down should belong to a named person before the day starts rather than to whoever is in the basket when it gets uncomfortable.

Rain adds its own problems: slippery basket floors, reduced visibility from the ground watch, and ground that was firm in the morning and is not by the afternoon.

The shared floor

Exclusion zones on a show floor last until another department needs to cross them. Maintain them anyway, brief the neighbouring crews, and use a person rather than cones where the floor is busy.

Tail swing is the part outsiders never expect. Anybody used to scissor lifts assumes the danger is in front of the machine, and walks behind it.

The end of the day

Bring the boom fully in and down onto its rest, retract the outriggers, park clear of exits and fire routes, and put it on charge or fuel it as the machine requires. Report any fault found during the day in writing rather than mentioning it to whoever is nearest.

A machine parked with the boom out is both a hazard and a sign that the last person ran out of time, which is exactly the state in which the next shortcut gets taken.

What a show adds

The machine is the same; the room is not.

How to do it

1. Agree who owns the machine for the call and who is trained on it.
2. Coordinate with the rigging crew about motors and moving loads.
3. Clear and control whatever is under the intended reach.
4. Post a ground watch with a radio, covering tail swing.
5. Measure wind if outdoors and name who calls the stop.
6. Stow it boomed in and down, clear of exits, on charge.

What goes wrong

Practice it

On your next outdoor or arena call.

Regulations & Certification

Which document says what, and what it actually takes to be an operator.

The rules — and why training is required.

Regulations and the certification requirement

In the United States the legal duty for these machines sits in the aerial lift rule, 29 CFR 1926.453, which is where the requirement to wear fall protection and attach a lanyard to the boom or basket comes from (the rule's text still says "body belt"; current practice is a full body harness), along with the ban on belting off to adjacent structure and on moving a machine with somebody elevated unless it is designed for it.

The consensus standards are the ANSI/SAIA A92 suite: A92.20 for design, A92.22 for safe use -- including the documented risk assessment, the site-specific rescue plan, and training for operators, occupants and supervisors -- and A92.24 for what training must contain.

Above both sits the manufacturer's manual for the specific machine. It is binding on the user, and it is the only document that knows where the auxiliary power switch is on that model.

This book is awareness/prep only

This book is not an operator qualification and cannot be. The framework requires general training, a knowledge evaluation, familiarisation on the specific machine, and a practical evaluation by a qualified person.

Use it to arrive at that training already fluent, and to recognise on site when something is wrong. Then get trained, evaluated and authorised for Group B machines specifically, and keep the record.

Who has to be trained

Three roles, as with every MEWP. The operator, trained, evaluated and authorised. The occupant, who shares the basket and must know the hazards, the fall protection, the rescue plan and what to do if the operator cannot operate. And the supervisor, who selects the machine and plans the work.

On a boom lift the occupant matters more than on any other machine, because entrapment can disable the operator instantly while leaving the occupant unharmed and standing next to them.

Familiarisation, and why a card is not enough

Training makes you an operator; familiarisation makes you an operator of this machine. Control layouts, envelope behaviour, load chart, alarms, where the auxiliary power is and how the emergency descent works all differ between manufacturers and models.

Ten minutes with the machine and its manual, every time you are handed one you have not used, and the whole crew present for the part about getting somebody down.

Where the rules live

The manufacturer's manual binds on top of all of them.

Group A and Group B qualifications

Training for one is not training for the other.

How to do it

1. Ask your employer which MEWP groups their training covers.
2. Take training that covers Group B and includes a practical evaluation.
3. Ask for familiarisation on every machine you are handed.
4. Keep your own copy of the record and diarise its expiry.
5. Book the refresher before it lapses.

What goes wrong

Practice it

On your own situation.

Lift Awareness & The Path

What to keep, and how to turn it into the card that lets you take the machine up.

Understand lifts and get properly certified.

Lift operation understood

A boom lift is a Group B machine: it puts the platform outside the wheels, which is why it has a load chart rather than a single capacity, why the ground under it matters so much, and why the harness rule is not optional.

Capacity falls as you extend. Outriggers go on pads, on ground somebody has actually assessed. The lanyard is short and clipped to the basket, because it is restraint against being thrown out rather than arrest after a fall, and it is never clipped to the structure you are working on. Tail swing puts the danger behind the machine as well as in front of it.

And entrapment is the accident that defines this machine: if you are pressed onto the controls, the machine keeps going. Ask for secondary guarding, stage every approach to structure, and keep somebody at the base controls.

Getting certified to operate lifts

Find training that covers Group B machines and includes a practical evaluation -- through your employer, a rental company with a proper programme, or an accredited provider. Expect theory, a written evaluation, real machine time and an assessor watching you operate.

If you also use scissor lifts, get Group A as well. Most AV crew need both, and one card does not cover the other.

Ask for familiarisation on every machine, keep the record, diarise the expiry, and take the refresher before it lapses.

Practical sign-off

This book builds lift awareness and prepares you to understand it. It does not certify you to operate a lift — that requires training with a practical evaluation by a qualified person, familiarisation on the specific machine and your employer's authorisation, as well as fall protection and following the regulations and manufacturer instructions.

• Understood boom lifts/AWPs and their hazards
• Understood safe setup, stability, and fall protection at an awareness level
• Understood safe operation within limits at an awareness level
• Understands that operating a lift requires being trained, evaluated and authorised by your employer

The failures that repeat

Boom lift incidents are not a long and varied list. The same few go wrong, in the same order, on jobs that were going fine until they were not — and every one of them announces itself before it finishes.

The recurring one is contact with structure. A basket driven up into a truss, a beam or a sprinkler main either traps the occupant against the rail or loads the boom and then releases it, which is the catapult. It repeats because the machine goes up faster than a person looks up, and because the last bit of height always feels like the cheap one.

The second is the unclipped occupant. A harness worn but not attached, or attached to the guardrail instead of the manufacturer's anchor, is the commonest finding after somebody comes out of a basket. It repeats because clipping on is the step with no immediate consequence for skipping it.

The third is reaching. Somebody decides on just one more inch rather than coming down and repositioning — leaning out over the rail, standing on the mid-rail, or pulling the machine toward the work with a hand on the structure. It repeats because repositioning costs four minutes and the reach costs none, right up until it costs everything.

The fourth is the ground. Driving elevated across a change in grade, a floor box, a cable ramp or soft fill puts a tall machine past the point where it comes back, and the operator six metres up is the last person able to see the ground they are crossing.

The fifth is being alone. No ground person means nobody watching the boom's path, nobody at the base controls, and nobody to bring you down. It repeats because a crew that is short always shortens this first.

Every one of these has a near miss version that happens far more often than the injury version — the basket that touched the truss, the lanyard found unclipped at the end of the shift, the machine that dipped and settled. A near miss is the same incident with the ending removed, and the only thing that makes it useful is somebody saying it out loud and writing it down. A crew where near misses are reported is a crew that gets to learn the cheap way.

What to do on Monday

• Find the load chart on the boom lift you use most and read the capacity at full reach.
• Find the auxiliary power and the base controls, and show one colleague.
• Ask your hire company which of their machines have secondary guarding.
• Ask who is named to call the stop for wind on your next outdoor job.
• Look at where people walk behind the machine on your next call.

Each takes minutes, and each is the kind of question that prevents the accidents the rest of this book describes.

Awareness against qualification

The difference matters legally and practically.

How to do it

1. Ask your employer which MEWP training they provide and when.
2. Confirm it covers Group B and includes a practical evaluation.
3. Attend, and treat the machine time as the real content.
4. Ask for familiarisation on each machine afterwards.
5. Keep the record and diarise its expiry.

What goes wrong

Practice it

This week.

Glossary

What the gear actually looks like

Every device named in this book, in one place. Recognition is the whole point of Chapter 4 — use this page to attach a picture to each name before you meet it on a dock at six in the morning.

Audio

Dynamic microphone

Condenser microphone

Wireless handheld

Radio rack

Mixing console

Stage box / snake

Power amplifier

Main loudspeaker

Subwoofer

Stage monitor wedge

In-ear monitors

DI box

Video

Camera

Video switcher

Scaler / processor

Projector

LED wall panel

Confidence monitor

Lighting & control

Conventional fixture

Moving-head fixture

Lighting console

Dimmer

Show controller

Media server

Networking & infrastructure

Network switch

Patch bay

Equipment rack

Power distribution

Cable tester

A properly coiled cable

Connectors, close up

XLR

TRS / TS ¼-inch

SDI on BNC

HDMI

Cat5e / Cat6 (RJ45)

Fiber optic

DMX (5-pin XLR)

AC power — not signal