Powered Access Equipment Inspection: MEWPs, Cradles and BMUs
Third-party inspection of scissor lifts, boom lifts, mast lifts, suspended cradles and building maintenance units, with emergency descent tested.
Powered access equipment puts people at height on a machine, which changes what an inspection has to establish. A load-carrying failure damages equipment; a failure here drops or traps an operator. itmad inspects scissor lifts, boom lifts, vertical mast lifts, suspended cradles and building maintenance units, examining structural condition, stability systems and emergency descent on that basis. itmad operates across the Middle East, Asia and Europe.
Equipment inspected
Electric and rough terrain scissor lifts, articulated and telescopic boom lifts, vertical mast lifts and personnel lifts, trailer and vehicle mounted platforms, spider and tracked platforms, suspended access cradles, building maintenance units (BMU), mast climbing work platforms, and personnel baskets and man cages.
Mobile elevating work platforms
The chassis, turntable and boom structure are examined for cracking, distortion and weld condition, with NDT of critical welds and pivot pins where condition requires, and scissor pack arms, pins and bushes are checked for wear and elongation. Outriggers, stabilisers and their deployment interlocks are examined, tilt and level sensing is verified, and the machine's response to an out-of-level condition is tested. Load sensing and the overload cut-out are function tested with a known load.
The platform, guardrails, toe boards, gate and harness anchor points are checked, as are hydraulic cylinders, hoses and holding valves, including creep under a held load, and drive, steer and braking, including operation on a gradient where applicable. Ground and platform controls, the deadman and the emergency stop are tested. Emergency lowering is function tested from the ground with the machine elevated: it is the control that matters when an operator is incapacitated at height, and it is frequently found untested. Capacity, wind rating and slope markings must be legible and correct.
Suspended cradles and BMUs
For suspended equipment, the inspector examines the roof rig, davit arms, monorail or trolley track and their fixings to the structure, and counterweight condition, correct mass and secure retention. Suspension and safety wire ropes are assessed against ISO 4309 discard criteria, and primary hoists and their brakes are tested for holding under load. Secondary or fail-safe devices, including the activation of the safety lock on overspeed or slack rope, are function tested and not inspected visually, and overload detection and slack rope sensing are checked.
The cradle structure, platform, guardrails and anchorage points are examined, as are limit switches and upper and lower travel stops, emergency descent and manual lowering arrangements, and the electrical supply, trailing cable condition and isolation. The inspection also looks at the rescue arrangements for an occupant stranded at height.
Load testing
Proof load testing is carried out on new installations, after structural repair or modification, after relocation or re-rigging of suspended equipment, and at the intervals that the client's specification requires. The load is applied at the percentage above rated capacity that the applicable standard states, with overload cut-outs, brakes and secondary devices verified and the structure examined after the test.
Standards applied
Inspection follows the standard that the contract or governing authority specifies. The most commonly applied are EN 280 for mobile elevating work platforms, the ASME A92 series for aerial work platforms, EN 1808 for suspended access equipment and BMUs, and ISO 4309 for wire rope discard criteria. The manufacturer's inspection and maintenance schedules are applied alongside the standard, since they set model-specific checks and component life limits.
Inspection intervals
Equipment used to lift persons is examined more often than equipment lifting loads: six months is the common baseline, and shorter in offshore, coastal or high-duty-cycle service. Inspection is also needed after transport and re-erection, after any structural repair, and following an incident or overload, and suspended equipment is re-examined after each re-rig to a new position on a building.
Rescue planning
An inspection that confirms the machine is serviceable does not confirm that someone can be recovered from it. Where a permit system or client specification requires a rescue plan, itmad verifies that the emergency descent controls actually function and are accessible from the ground, and reports where they are not. This is among the most common findings on otherwise well-maintained equipment.
What the client receives
An inspection certificate in the format that the governing authority requires, and a report that identifies each unit by serial number, capacity and location. Findings are recorded component by component with photographic evidence, defects are classified by severity, and load test results record the applied load and post-test condition. Units are tagged on site with colour coding, and the equipment register is updated where itmad holds it. Inspection can be scheduled alongside crane, lifting gear and fall protection inspection in one attendance.
Frequently asked questions
Why is powered access equipment inspected differently?
A load-carrying failure damages equipment, but a failure on powered access equipment drops or traps an operator. The inspection therefore focuses on structural condition, stability systems and emergency descent.
Why is emergency lowering tested from the ground?
It is the control that matters when an operator is incapacitated at height, and it is frequently found untested. itmad function tests it with the machine elevated and reports where it is not accessible from the ground.
What equipment is inspected?
Scissor lifts, boom lifts, vertical mast lifts, trailer and vehicle mounted platforms, spider and tracked platforms, suspended cradles, building maintenance units, mast climbing work platforms and personnel baskets. Each is inspected for structural condition, stability systems and emergency descent.
Which standards apply?
EN 280 for mobile elevating work platforms, the ASME A92 series for aerial work platforms, EN 1808 for suspended access equipment and BMUs, and ISO 4309 for wire rope. The manufacturer's inspection and maintenance schedules are applied alongside.
How often is powered access equipment inspected?
Six months is the common baseline, and shorter in offshore, coastal or high-duty-cycle service. Inspection is also needed after transport and re-erection, structural repair, an incident or overload, and after each re-rig of suspended equipment.
How are suspended cradles checked?
The roof rig and its fixings, counterweights, suspension and safety wire ropes, hoist brakes and the safety lock are checked, with the secondary devices function tested and not just inspected visually. Rescue arrangements for a stranded occupant are also examined.