Lifting equipment design

Practical Engineering specialises in the design and certification of lifting equipment.

We also offer a 10 & 25 year crane inspection service as well as API Cat 3 & 4 Rig Inspections.

Our qualified engineers are recognised under relevant State and Australian legislation to perform crane inspections and issue certificates. 

The industry sectors service and equipment we design and certify include:

  • Re-certification upon modification
  • Modification of load cases
  • Re-certification of repairs
  • OH&S Certification of lifting equipment
  • Re-certification after relocation of equipment and parts (e.g. second hand cranes)
  • RPEQ (Registered Professional Engineer Queensland)
  • CPEng (Chartered Professional Engineer) qualified certifications
  • NPER (National Professional Engineers Register)
Certification and design of:
  • Monorails
  • Gantries
  • Jibs
  • Winches
Certification and design
  • Lifting beams
  • Cee hooks
  • Pallet hooks
  • Lifting frames
  • Bull horns
  • Lifting yolks (drilling equipment)
  • Grabs
  • Scissor hooks

Designed in consultation with the client to completely meet the specialist lifting requirement

Design of all types of lifting equipment, including
  • Cranes
  • Hoists
  • Winches
  • Slings and cradles
  • Man boxes

We certify custom lifting equipment – including lifting lugs and pad eyes.  We offer advice on testing, maintenance schedules and inspection periods and provide guidance and design.

A lifting lug must be certified if used
  • In a lifting, hoisting or a winching action;
  • In an application where its failure could result in serious injury or death; or
  • In an application which could result in any injury – the situation needs to be at least checked by a qualified engineer.

If in doubt, seek guidance.

Applicable standards

There are no Australian Standards specific to lifting lugs and pad eyes, however there are a number of standards that discuss the lug requirements and safety considerations.  The following is provided as an indication of some of the applicable standards and not as a comprehensive list.

  • AS4991 Lifting Devices
  • AS1891  Industrial Fall Arrest
  • AS1418 Cranes, Hoists and Winches (Crane Code)
  • AS4380 Cargo Restraint Systems
  • AS4744 Steel Shoring and Trench Lining Equipment

The specifics of the lug should be certified against AS3990 Mechanical Equipment – Steel Work and AS4100 Steel Structures.

What we need to know
  • The material of the lug
  • Service – what does it do, expected load, frequency and duration of use (duty cycle), direction of load in relation to the mounting of the lug.
  • Basic dimensions of the lug.
  • The weld and quality of the weld.
  • Most importantly, the structure the lug is connected to.
  • Lifting lugs should be permanently marked with the applicable information
    • For lifting, hoisting or winching – either WLL (Working Load Limit) or SWL (Safe Working Load).
    • For lugs used for lashing – LC (Lashing Capacity)
  • It is good practice to assign a lug number to each lug – for the future identification of the lug (quality control measure).
  • The centre hole on a lifting lug should never be flame cut as if the lug needs to undergo NDT (Non Destructive Testing) the flame cut may leave flaws in the material.

In most instances, it is also a good idea to examine the structure the lug is connected to – as there is no use having a certified lug attached to an unsuitable structure.

Certification of
  • Masts
  • Padeyes and lifting lugs
  • Custom lifting equipment (for example: Clam shells, nubbins, subs, elevators)
Design of:
  • Rigs (Exploration, CBM, Oil & Gas)
  • Drill base
  • Pony base
  • Sub bases
  • Rig matts
  • Rig Jacks
Specialist machinery:
  • Rod and Collar loaders
  • Pipe tub trailers
  • Rod sloops
  • BOP (Blow Out Protection) Handling systems
  • Drafting of site plan/rig map
  • Lug/padeye registers
  • Design and manufacture of test weights and test beds
  • Recommendations on correct testing procedures and methodology
  • Analysis of the test and results