LOLER and Lifting Equipment —
What Mechanical Engineers
Need to Know

Lifting equipment sits at an uncomfortable intersection for mechanical engineers. The structural calculations are generally straightforward — a pad eye, a lifting beam, or a spreader frame is not a complex structural problem. What is less straightforward is the regulatory framework that surrounds it: which regulations apply, what documentation is required, who is competent to certify the equipment, and how the design responsibility interacts with LOLER, CDM, the Machinery Directive, and the client's own lifting procedures. Getting this wrong does not produce a structural failure — in most cases the equipment is adequately designed. It produces a compliance failure, which in a notifiable incident investigation is treated as seriously as the technical failure it might have prevented.

This article covers what a mechanical engineer designing lifting points, pad eyes, lifting beams, and spreader frames needs to know: the legislative framework, the design requirements, the certification obligations, and the interaction with the broader compliance landscape.

The Legislative Framework

LOLER 1998 — The Lifting Operations and Lifting Equipment Regulations

LOLER places duties on employers and the self-employed in respect of lifting equipment used at work. The principal requirements relevant to the design and specification of lifting equipment are:

• Regulation 4 — Strength and stability: Every item of lifting equipment must be of adequate strength and stability for the load and conditions of use. This is the basic structural adequacy requirement — the equipment must be designed to carry the intended load with an appropriate margin.
• Regulation 6 — Thorough examination: Lifting equipment must be thoroughly examined by a competent person before it is first used (if it has not previously been in service and its safe condition cannot be verified from a declaration of conformity), after assembly at a new location, periodically thereafter (every 6 months for equipment used to lift persons, every 12 months for other lifting equipment, or at intervals specified in an examination scheme), and following any exceptional circumstances that may have affected its safe condition.
• Regulation 7 — Reports of thorough examination: The competent person must produce a written report of every thorough examination. The report must contain specific information including the safe working load, any defects, and a declaration of whether the equipment is safe to continue in use.

LOLER defines lifting equipment broadly: "work equipment for lifting or lowering loads, and includes its attachments used for anchoring, fixing or supporting it." This definition captures not only cranes and hoists but lifting beams, spreader frames, lifting frames, vacuum lifters, and any item of lifting tackle. Crucially, it includes lifting points and pad eyes that are permanently attached to equipment or structures — if they are intended to be used for lifting, they are within scope.

PUWER 1998 — The Provision and Use of Work Equipment Regulations

PUWER underpins LOLER. All lifting equipment is also work equipment under PUWER, and the general requirements of PUWER (suitability for purpose, maintenance, inspection, safe use) apply in addition to the specific LOLER requirements. PUWER Regulation 4 requires that work equipment be "so constructed or adapted as to be suitable for the purpose for which it is to be used or provided." This is the statutory basis for the design adequacy requirement.

Machinery Directive 2006/42/EC (UK MDR 2008 post-Brexit)

The Machinery Directive (retained in UK law as the Supply of Machinery (Safety) Regulations 2008 and the Machinery Regulations 2008) applies to machinery placed on the market. A lifting beam or spreader frame manufactured and supplied commercially is machinery within the scope of the Directive and must be CE marked (UKCA marked in Great Britain post-Brexit) with a Declaration of Conformity. The essential health and safety requirements (EHSRs) of Annex I to the Directive define the design requirements for machinery, including specific requirements for lifting accessories and non-guided load lifting equipment.

The practical implication: if you design and supply a lifting beam to a client, you are placing machinery on the market and you carry the Machinery Directive obligations. If you design a pad eye or lifting point that is permanently welded to equipment you have also designed, the lifting point is part of that equipment and its compliance is covered by the equipment's own Machinery Directive or PED declaration. The distinction matters for what documentation you must produce.

Safe Working Load and Design Load

Every piece of lifting equipment must be marked with its Safe Working Load (SWL) — the maximum mass it is designed to lift under normal operating conditions. The SWL is not the ultimate load capacity of the equipment. It is the capacity after application of the design safety factor, which accounts for dynamic effects, material variability, and the consequences of failure.

The design safety factors applied in lifting equipment design vary by code and by whether the equipment is considered a lifting accessory (tackle, spreader beams, lifting frames — typically safety factor 4:1 on proof load, or 5:1 on breaking load, as required by BS EN 13155 and similar standards for below-the-hook equipment) or structural lifting equipment designed to BS EN 1993 (Eurocode 3) where load factors are applied to the design loads per the standard.

A practical working approach for designed lifting equipment in the UK process and manufacturing industries:

• Design load = SWL × dynamic amplification factor (DAF). The DAF accounts for the dynamic effects of lifting — acceleration, deceleration, sway. For manually controlled crane lifts in sheltered conditions, the HSE guidance suggests a DAF of 1.3 is a reasonable starting point. For offshore or harsh environment lifts, DNVGL-ST-N001 applies higher factors.
• Structural adequacy: calculated stresses at design load must not exceed the material's design strength per the applicable standard (BS EN 1993-1-1 for steelwork, BS EN 1993-1-8 for connections and welds).
• Proof load: lifting equipment should be proof-tested at 1.25× SWL (for lifting accessories) or 1.1× SWL (for larger structural lifting equipment) before first use, per BS EN 13155 and HSE guidance.

Pad Eyes and Lifting Points — Design Requirements

The pad eye is the most common lifting point designed by mechanical engineers — a steel plate with a circular hole, welded to a vessel, structure, or piece of equipment to allow crane attachment. Simple in appearance, but several design requirements are frequently missed:

Hole sizing

The shackle pin must be able to enter the hole freely and seat fully. Undersized holes — common when the pad eye plate is sized for strength but the pin diameter is not checked against the hole — prevent the shackle from seating correctly, producing point loading on the hole edge rather than distributed bearing on the pin. BS EN 13155 and generic lifting tackle standards specify that the hole diameter should be the pin diameter + 3mm for shackles up to 25mm pin, and pin diameter + 5mm for larger pins.

In-plane loading

Pad eyes are designed for in-plane loading — the lifting force acts in the plane of the plate, through the hole. Out-of-plane loading (side loading) produces bending in the plate that the standard calculation does not account for. Where side loading is possible — angled slings, lifts where the crane cannot be directly above the lifting point — the pad eye must be designed for the actual loading direction, not the idealised vertical. This typically requires either a thicker plate with side-load analysis or the use of a swivel pad eye or a shackle that can accommodate angular movement.

Weld design

The weld between the pad eye plate and the parent structure carries the full lifting load. Weld design to BS EN 1993-1-8 must account for the full load vector including any eccentricity between the load application point (the hole centre) and the weld group centroid. The HAZ in the parent material must also be checked — thin-walled vessels and structures may require reinforcement pads around pad eye attachments to distribute the load into the parent material without overstressing the shell at the weld toe.

Orientation

Every pad eye should be clearly marked with its SWL and, where the design is orientation-specific, with the permitted loading direction. A pad eye designed for vertical in-plane loading only should be marked as such — "SWL 2.0t — VERTICAL LOAD ONLY" prevents field personnel from rigging an angled sling to a pad eye that has not been assessed for that condition.

Lifting Beams and Spreader Frames

A lifting beam is a rigid beam suspended from a single crane hook at its centre, with two or more attachment points below for rigging to the load. A spreader frame is a structural frame that distributes the load from a single crane hook to multiple attachment points, maintaining a fixed geometry of rigging. Both are used to lift loads that cannot be rigged to a single point — either because the load geometry requires multiple attachment points, or because vertical rigging above each attachment point is required (to avoid horizontal sling forces that would damage the load or the lifting points).

Design considerations

A lifting beam in service sees its primary loading in bending — the load applied at the attachment points below the beam creates bending moments that must be carried by the beam section. The load above is applied at a single point (the master link or crane hook attachment). This is a simply supported beam with a central point load for a single upper attachment, or a more complex distribution for multiple attachment geometries.

Critical design checks for lifting beams:

• Bending moment and shear force at all sections under the design load (SWL × DAF)
• Lateral-torsional buckling — lifting beams are typically slender I-sections or RHS members loaded in the weak axis of their support configuration. LTB check to BS EN 1993-1-1 Clause 6.3.2 is required.
• Deflection — excessive deflection under load changes the rigging geometry and the load distribution between attachment points, and may cause the load to tilt
• Attachment point design — the upper and lower attachment points are pad eye or plate designs per the guidance above, plus the local stress at the beam web and flanges at each attachment
• Proof load testing — the beam must be proof tested at 1.25× SWL before first use

The Thorough Examination and Certification

Before any lifting equipment is used, it must be thoroughly examined by a competent person. LOLER defines a competent person as someone who "has such appropriate practical and theoretical knowledge and experience of the lifting equipment to be thoroughly examined as will enable them to detect defects or weaknesses and to assess their importance in relation to the safety and continued use of the lifting equipment." This is a functional definition — it does not specify a qualification — but in practice, thorough examination of designed lifting equipment is carried out by chartered engineers or inspection bodies (typically Lloyd's Register, Bureau Veritas, Intertek, or similar) with experience in structural lifting equipment assessment.

The competent person's thorough examination for a new item of designed lifting equipment typically includes:

• Review of the design calculations and confirmation that the design is adequate for the declared SWL
• Review of the material certificates for the primary structural components
• Review of the weld procedure qualifications and inspection records for welds in primary load paths
• Visual inspection of the completed equipment
• Witness or review of the proof load test
• Issue of the written report of thorough examination, including the SWL marking requirement

The report of thorough examination is the document that legally permits the equipment to be used. It must be retained by the owner for the life of the equipment plus two years (for non-person-carrying equipment) or for the life of the equipment (for equipment used to carry persons).

Marking Requirements

LOLER Regulation 7 and the Machinery Directive both require lifting equipment to be marked. The minimum marking for a lifting beam, spreader frame, or pad eye is:

• Safe working load (SWL) in kg or tonnes
• Identification mark (serial number or unique reference that links the equipment to its thorough examination report)
• For lifting accessories: CE / UKCA mark where applicable (i.e. where the item is placed on the market rather than manufactured for own use)
• For orientation-specific items: the permitted loading direction or configuration

Marking should be by stamping, engraving, or a permanently attached plate. Painted markings are not acceptable — they are obscured by repainting or contamination and are not durable for the life of the equipment.

Interaction with CDM 2015

Where lifting equipment is designed as part of a construction project to which CDM 2015 applies, the Principal Designer has a duty to ensure that the design takes account of the health and safety risks associated with lifting operations — including the provision of adequate and properly located lifting points on structures and permanent plant. This means that pad eyes and lifting points on structures designed under CDM should be identified in the design drawings, their SWL should be specified, and this information should be passed to the Principal Contractor for inclusion in the construction phase plan and ultimately to the client for inclusion in the Health and Safety file.

A common failure: lifting points are designed for the installation lift (to position a piece of equipment during construction) but are not specified or communicated to the client as permanent maintenance lifting points. The maintenance team subsequently uses them for the maintenance lift without knowing the design intent, SWL, or certification status of the points they are using. The H&S file should document every permanent lifting point: its location, its SWL, its certification reference, and whether it is intended for construction use only or for ongoing maintenance.

What the Designer Must Produce

For a designed lifting beam, spreader frame or set of pad eyes, the minimum documentation package is:

1. Design calculation — structural analysis at design load (SWL × DAF), all sections checked, weld design, LTB check for beams. Referenced to the applicable standard (BS EN 1993-1-1, BS EN 1993-1-8).
2. General arrangement drawing — dimensioned, with material specification, weld specification, and SWL clearly marked. The drawing the fabricator works from and the thorough examiner reviews.
3. Material specification — grade, standard, and certificate requirement (EN 10204 3.1 minimum for primary structural elements).
4. Weld procedure specification — WPS for all welds in primary load paths, with qualified backing PQR.
5. Proof load test procedure — how the proof test will be conducted, at what load, and what acceptance criteria apply.
6. Declaration of Conformity (where required by the Machinery Directive) — confirming compliance with the applicable EHSRs.

These six documents, along with the competent person's report of thorough examination and the proof load test record, constitute the certification package for a piece of designed lifting equipment. Any client operating in a regulated or certified environment (aerospace, nuclear, offshore) will require all of these as a minimum condition of acceptance.

Summary

Lifting equipment designed by mechanical engineers — pad eyes, lifting beams, spreader frames — sits within a clear and non-optional compliance framework. LOLER requires structural adequacy, thorough examination before use, and periodic re-examination. The Machinery Directive requires CE/UKCA marking and a Declaration of Conformity for equipment placed on the market. CDM requires that permanent lifting points are documented in the H&S file. The design itself — the structural calculation — is typically the straightforward part. The compliance package — the calculation, the drawing, the material certificates, the weld qualification, the proof load test, the thorough examination report, and the SWL marking — is what turns a structurally adequate piece of equipment into one that is legally fit for use.