Category 5
| 5.M.1 | Assembling (n.e.s.). |
| 5.M.2 | Constructional boilermaking and/or constructional pipe fitting and/or constructional steelwork (n.e.s.), including: |
| 5.M.2.1 | Setting out, setting up, levelling, aligning of steelwork, pipe-work and machinery using theodolites and/or dumpy gauges and/or micrometers. |
| 5.M.2.2 | Marking-off and marking-out. |
| 5.M.2.3 | Fabrication, modification and/or rectification of steelwork and/or pipework. |
| 5.M.3 | Internal combustion engine fitting. |
| 5.M.4 | Jig and/or template making and/or repairing. |
| 5.M.5 | Mechanical fitting (n.e.s.). |
Category 4
| 4.M.1 | Alignment of machinery using straight edge. |
| 4.M.2 | Assembly of preprocessed and/or pre-marked items forming the following finished components, where no adjustments or modifications are required, under supervision of Category 5 employee: |
| 4.M.2.1 | Rolled clauses and profiles (as supplied by mills) with welded and/or bolted end connections and stiffeners, shelf angles and plates. |
| 4.M.2.2 | Plate girders, with welded and/or bolted end connections and stiffeners, shelf angles and plates. |
| 4.M.2.3 | Latticed structural components, with welded and/or bolted fittings and/or connections including latticed columns. |
| 4.M.2.4 | Built up clauses, with welded diaphragms, stiffeners and end connections. |
| 4.M.2.5 | Pipes: Assembling of pre-prepared piping and/or pre-manufactured pipe fittings. |
| 4.M.2.6 | Plate work: Assembly of pre-assembled parts for the final assembly of bins, tanks or ducting. |
| 4.M.3 | Installation and/or expanding of boiler tubes. |
| 4.M.4 | Installation of pre-assembled mechanical components limited to mass of 5 tonnes, using power hoists and/or cranes including utilising general arrangement and/or location drawings, under supervision of Category 5 employee. |
| 4.M.5 | Installation of pre-prepared piping and/or pipe fittings (n.e.s.) under supervision of Category 5 employee. |
| 4.M.6 | Levelling and alignment of steelwork, pipework and machinery with lines and spirit levels from predetermined beacons. |
| 4.M.7 | On site modification, excluding marking off or out, under supervision of Category 5 employee. |
| 4.M.9 | Scarfing and/or ending by machine. |
| 4.M.10 | Supervising employees employed in classes of work below Category 4. |
Category 3
| 3.M.1 | All operations in dismantling, cleaning and re-assembly of welding machines under supervision of Category 5 employee. |
| 3.M.2 | Arc and/or gas cutting (n.e.s.). |
| 3.M.3 | Assembly to jigs and/or fixtures requiring no modifications and/or adjustments (confined to workshops). |
| 3.M.4 | Attending and/or operating sawing machines including marking off and/or setting of stops. |
| 3.M.5 | Bending and/or forming of tubes and/or clauses. |
| 3.M.6 | Dismantling of steelwork and/or structures and/or pipe installations and/or mechanical components including use of gas and/or electric torch. |
| 3.M.7 | Drilling and/or counter-sinking and/or reaming including sharpening of drills. |
| 3.M.8 | Installation of pre-manufactured galleries, casings, handrails, kickplates, flooring and stairtreads where no alteration is required. |
| 3.M.9 | Installation of pre-prepared flanged and screwed pipes and/or pipe fittings, including making of joints, under supervision of Category 5 employee. |
| 3.M.10 | Marking off and/or out to templates and/or template sketches. |
| 3.M.11 | Operating power driven or hydraulic press (n.e.s.) including affixing and/or removal of dies. |
| 3.M.12 | Operating single and/or multi-head oxyacetylene cutting machines and/or profiling and/or flame planing and/or bevel cutting machines including measuring and setting up (n.e.s.). |
| 3.M.13 | Repetition roller bending and/or forming of plate using pre-set rolls (excluding setting of rolls) (n.e.s.). |
| 3.M.14 | Riveting and/or caulking (n.e.s.). |
| 3.M.15 | Sawing and/or cropping and/or shearing and/or guillotine shearing and/or punching, including measuring and/or setting up. |
| 3.M.16 | Setting and aligning pipe and plate joints, using jigs and/or fixtures, prior to welding. |
| 3.M.17 | Straightening and/or flattening (n.e.s.). |
| 3.M.18 | Supervising employees employed in classes of work below Category 3. |
| 3.M.19 | Supervising sheeting work, including marking off. |
| 3.M.20 | Supervising the torqueing of bolts. |
Category 2
| 2.M.1 | Affixing sheeting under supervision. |
| 2.M.2 | Cutting and/or grinding to marks and/or gauges, using abrasive discs or wheels. |
| 2.M.3 | Heating and holding for riveting. |
| 2.M.4 | Installation and tightening of bolts in accordance with specification requirements, including torqueing of bolts. |
| 2.M.5 | Operating gas cutting equipment for trimming materials. |
| 2.M.6 | Operating mechanical bevelling machine. |
| 2.M.7 | Reaming, using handheld machines. |
| 2.M.8 | Rough straightening and/or bending steel members under supervision. Where heat is required for straightening such operations shall be done under supervision of Category 5 employee. |
| 2.M.9 | Sand and/or shot and/or hydro and/or grit blasting. |
| 2.M.10 | Stamping and/or affixing metal labels and/or nameplates. |
| 2.M.11 | Stripping and cleaning of mechanical components as instructed by, and under supervision of Category 5 employee. |
| 2.M.12 | Threading and/or tapping. |
| 2.M.13 | Receiving, locating, preparing and issuing materials, tools and/or stock and/or consumables from requisition lists in stock and/or materials stores on a construction site. |
Category 1
| I.M.1 | Application of anti-corrosive and anti-fouling and/or protective coatings (n.e.s.). |
| I.M.2 | Attending a cleaning and/or degreasing and/or acid and/or rinsing bath. |
| I.M.3 | Cutting, dressing and/or deburring by hand and/or by grinding and/or portable power tools and/or rotary wire brush and/or wire brushing by hand to marks and/or gauges. |
| I.M.4 | Descaling by chipping and/or scraping. |
| 1.M.5 | Gas cutting of scrap. |
| I.M.6 | Rough straightening. |
| 1.M.7 | Installation and tightening of bolts under supervision, excluding tor-queing. |
| I.M.8 | Oiling and/or greasing. |
| I.M.9 | Operating a hoist and pendant controlled lifting equipment, eg semi-goliath cranes, etc. |
| I.M.10 | Operating hand hoist. |
| I.M.11 | Removal of rust and/or coatings. |
| 1.M.12 | General labouring, including packing, stocking, loading, unloading and cleaning duties in a stock and/or materials store on a construction site. |
Category 1(a)
I.M.1(a) Basic labouring during first nine months’ service.
