ISA Aerial Lift Specialist cheat sheet

Risk assessment sequence: identify hazards, evaluate exposure severity and likelihood, control (eliminate, substitute, engineer, administrate, PPE), re-evaluate before work starts and after any change in conditions.

Site survey items for lift work: overhead lines and their voltage, slope and grade, drop-offs and trenches, soft or uncompacted fill, buried utilities, floor/deck load ratings, door and beam clearances, pedestrian and vehicle traffic, wind exposure.

Ground bearing pressure rises sharply with lift weight plus rated load; a fully loaded boom lift can impose several times the pressure of the empty machine, so verify slab, deck, or soil capacity before travel.

Overhead power lines are the leading cause of fatal aerial lift incidents; treat any line as energized until the utility confirms de-energized and grounded status in writing.

Wind is a live hazard: manufacturer-rated wind speed is a maximum, not a target; stop when gusts exceed the rating or when the load or canopy catches wind and the platform becomes hard to control.

Pinch and crush points: platform control box versus structure, basket rail versus branch or beam, and the lift's own boom-to-chassis articulation during stowing.

Record the assessment: date, site, hazards, controls, names, and re-assessment triggers (weather change, new trade on site, shift change).

Boom lifts (MEWP group A, type 1/2/3) articulate or telescope to reach up and over obstructions; scissor lifts (group B, type 1/2/3) move vertically only and must not be driven elevated unless the manufacturer permits it.

Type 1 = cannot travel when elevated except within the footprint; type 2 = travel allowed elevated with controls at the platform; type 3 = travel allowed elevated with controls at the base (chassis).

Bucket truck (insulated aerial device) uses a boom with an insulating boom section and bucket liner; it is rated by class and voltage, and the insulating value depends on cleanliness and dryness of the boom and liner.

Key components: base/chassis, turntable, riser, boom sections, jib, platform with gate and anchor point, outriggers or stabilizers, leveling system, tilt sensor, overload sensor, and emergency lowering system.

Selection inputs: working height (platform height plus reach), horizontal reach at height, platform capacity, machine weight and ground pressure, transport width/height, power source, and required travel while elevated.

Working height in most manufacturer literature equals platform height plus roughly 1.8 m (6 ft) of reach above the platform; do not confuse working height with platform height when planning.

Articulating booms fit tight canopy work; telescopic booms give longer straight reach; scissor lifts suit level slab interior work with multiple occupants and tools.

Pre-start walkaround: structural cracks, weld cracks, bent or dented members, hydraulic leaks, hose chafing, tire or track condition, wheel lug torque, battery condition and electrolyte, and placard/decals legible.

Fluid and power checks: engine oil, hydraulic oil level, coolant, fuel, battery charge, and any manufacturer-specified grease points.

Function test at the start of each shift: all platform and ground controls, emergency stop, horn, tilt alarm, overload alarm, leveling, steering, brakes, travel speed limits, and emergency lowering.

Fall protection anchor point inspection: verify the designated anchor, lanyard condition, and that the harness is inspected per manufacturer intervals.

Outrigger/stabilizer function check: full extension, pad condition, interlock that prevents boom operation when outriggers are not set, and level indicator within tolerance.

Defects: tag out and remove from service; never operate a lift with an inoperative safety device, and record the defect in the maintenance log.

Inspection intervals: pre-use each shift, frequent (typically monthly or per manufacturer), and annual comprehensive inspection by a qualified person, plus inspection after any incident or repair.

Never exceed the platform rated capacity; capacity includes occupants, tools, materials, and any attachments, and it decreases with platform extensions or jib use on many models.

Occupant limits are set by the manufacturer; scissor lifts commonly allow more occupants than boom lifts, but each person must remain inside the guardrails with feet on the platform floor.

Keep the platform gate closed and latched; do not climb on or over guardrails, and do not use planks, ladders, or other devices inside the platform to gain height.

Travel rules: lower the boom before travel unless the machine is rated for elevated travel; keep the platform over the chassis footprint when driving; watch tail swing and overhead clearance.

Set the parking brake, chock wheels on slopes if required, and use wheel or outrigger pads to spread load on soft ground.

Maintain three points of contact when entering or exiting, and use the manufacturer's entry gate or step rather than climbing the structure.

Controlled descent: if controls fail, use the auxiliary/emergency lowering system per the manufacturer's procedure; do not attempt to climb down the boom.

OSHA 1910.269 Table R-6 and 1926.960 define minimum approach distances by voltage; for 50 kV and below the phase-to-phase MAD is 10 ft (3.05 m) for a qualified employee, with additional distance for voltages above that.

For unqualified persons, OSHA 1926.1408 Table A requires 20 ft for lines up to 350 kV and greater distances above that; the lift operator is generally treated as unqualified unless trained and qualified.

The MAD is measured from the energized part to the closest part of the lift, the load, and the operator; conductive tools and branches extend the effective reach.

Insulated bucket truck booms protect only when maintained: the insulating section, bucket liner, and any covers must be clean, dry, and undamaged, and tested per the required interval.

Never allow any part of the lift or load to contact a line; if contact occurs, the operator should stay in the platform and warn others away until the line is de-energized.

If a lift contacts a line and fire forces exit, jump clear without touching the machine and the ground at the same time, then shuffle or hop away.

Assume induced voltage and step potential near downed lines; establish an exclusion zone and call the utility.

Boom lift occupants must wear a full-body harness with a lanyard attached to the manufacturer-designated anchor point; the lanyard should be short enough to prevent falling over the guardrail.

Scissor lift occupants typically do not need fall arrest when the gate is closed and the platform is within guardrail height, but the manufacturer's manual governs; a restraint system may be required.

Fall protection equipment inspection: webbing cuts, fraying, UV damage, hardware cracks, and lanyard stitch integrity; remove damaged gear from service immediately.

PPE for aerial work: hard hat with chin strap, safety glasses, gloves, high-visibility clothing, and hearing protection where required; footwear with slip resistance.

Rescue plan: pre-plan the retrieval method, identify the rescuer and equipment, and ensure a means to lower an incapacitated worker exists before the lift goes up.

Suspension trauma can develop quickly; a worker hanging in a harness must be rescued promptly and treated by medical personnel.

Emergency lowering from the ground is the first-line rescue for a platform failure; practice it during function testing.

Set up on firm, level ground; check the manufacturer's slope limit (often around 5 degrees or less) and use the tilt indicator to confirm before elevating.

Outriggers and stabilizers must be fully extended and set on pads sized to the ground bearing capacity; never operate with a partially extended outrigger.

Keep clear of excavations, trenches, and un-compacted fill; a lift can tip or drop when the ground gives way under a wheel or outrigger.

Maintain clearance from overhead lines, structures, and traffic; use cones, barricades, and a spotter when the lift encroaches on a roadway or pedestrian path.

Spotter duties: guide travel, watch for overhead obstructions and pedestrians, and maintain communication with the operator; the spotter stays out of the lift's path.

Wind and weather: stop operations when wind exceeds the manufacturer's limit, during lightning, or when visibility is reduced.

Traffic control: use flaggers or signs, maintain a safe buffer from moving vehicles, and ensure the lift's travel path is clear of other equipment.

Position the lift so the boom travels through a clear path to the work area; avoid pushing branches with the basket and avoid side-loading the boom with rigging forces.

Never tie off rigging lines or attach a load to the platform or boom; the lift is not a rigging anchor and side loads can tip or damage it.

Use the lift for positioning and access, and rig from the tree or a separate anchor; keep rigging forces off the lift.

Canopy hazards: deadwood, hangers, bee or wasp nests, poison ivy/oak, and unstable leaders; inspect before entering the canopy.

Keep the platform clear of the saw's kickback path and never operate a chainsaw one-handed; use a lanyard or saw strop to secure the saw.

Tree-side positioning: account for the tree's lean, root flare, and soil disturbance; avoid setting outriggers on roots or near the stump where the ground may be weak.

Emergency plan for tree work includes aerial rescue of a climber and lowering an incapacitated worker from the platform.

OSHA 29 CFR 1926 Subpart L covers aerial lifts in construction; 1910.67 covers vehicle-mounted elevating and rotating work platforms in general industry; 1910.269 covers power generation and distribution work.

ANSI/SAIA A92 standards define lift design, safe use, and training: A92.20 design, A92.22 safe use, A92.24 training, and A92.2 for vehicle-mounted rotating work platforms.

OSHA requires training for each type of lift the operator uses, including familiarization with the specific model's controls, capacity, and limitations.

The operator is responsible for the pre-use inspection, function test, and stopping work when conditions become unsafe; the employer must provide training, maintenance, and a compliant rescue plan.

Recordkeeping: maintain inspection logs, training records, and maintenance records; retraining is required after an incident or when the operator demonstrates unsafe operation.

Employer program elements: hazard assessment, trained operators, equipment maintenance, rescue plan, and a process to remove defective equipment from service.

When a standard and the manufacturer's manual differ, follow the more protective requirement; the manual is part of the required operating instructions.