33
Total hazards mapped
AI-ASSISTED
Hazards generated from the Output 02 Task Sequence and the Output 01 Job Intake against Built AI's task-hazard knowledge base. Controls drafted by AI from the controls library and reviewed by a competent person before issue. No generic templates were used in the production of this matrix.
8
Tasks in sequence
12
Initial · high or VH
0
Residual · high or VH
30
Residual · low
Task sequence at a glance — Output 02 reference
T01Setup & segregation
T02Strip-out
T03Penetrations & first-fix containment
T04Partition install
T05Suspended ceiling
T06M&E first fix
T07Floor finishes
T08Commission & handover
Matrix — task by task
T01
Site setup, segregation & welfareEstablish work area, install barriers and signage, agree access routes with building manager.
4 HAZARDS
ID
Hazard
Persons at risk
Initial
Control measures
Residual
H1.1
Slips, trips and falls on shared circulation routesCable trailing, materials in walkways
Operatives, building tenants, visitors
9 · MED
Daily housekeeping, cable management plan, defined material laydown areas, protected walkways, end-of-shift sweep.
3 · LOW
H1.2
Manual handling — initial materials dropPartition track, plasterboard sheets, ceiling grid
Operatives
12 · HIGH
Mechanical handling aids, team lifts for awkward items, planned route in advance, manual handling brief at induction.
4 · LOW
H1.3
Live environment interface — tenant accessWorking area adjacent to occupied tenant floors
Operatives, tenants, visitors
12 · HIGH
Heras / hoarding to full perimeter, agreed access routes, pre-notified disruptive activity, daily liaison with building manager.
4 · LOW
H1.4
Unauthorised access to work zonePupils / public / tenants entering work area
Operatives, tenants, public
9 · MED
Lockable hoarding, signage, end-of-day site secure-down, reception briefed, no contractor signage on tenant routes.
3 · LOW
T02
Strip-out of existing partitions, ceiling & floor finishesControlled removal of Cat A partitions, suspended ceiling tiles, carpet and floor finishes — segregated waste.
5 HAZARDS
ID
Hazard
Persons at risk
Initial
Control measures
Residual
H2.1
Asbestos disturbance — pre-2000 constructionRisk in plasterboard, ceiling tiles, vinyl tiles
Operatives, building occupants
20 · VH
Asbestos refurbishment survey reviewed pre-start, all suspect materials assumed ACMs until tested clear, stop-work and Estates referral if encountered, ACM register held on site.
8 · MED
H2.2
Hidden services strike during partition removalPower, data, comms within partition voids
Operatives
12 · HIGH
Service drawings reviewed pre-start, services traced and isolated where required, controlled dismantling, cable detection scan before cutting.
4 · LOW
H2.3
Falling debris from ceiling tile removalCeiling tiles, broken grid, residual fixings
Operatives, persons below
9 · MED
Exclusion zone below dismantling, hard hats, tiles bagged at source, no tools at height left unattended, suspended ceiling brief.
3 · LOW
H2.4
Manual handling — repetitive partition panel removalAwkward postures, panel weight, height handling
Operatives
9 · MED
Mechanical aids, planned dismantling sequence, rest breaks, two-person lift for panels, MH brief refresher.
3 · LOW
H2.5
Sharp edges from removed metalwork & studworkStudwork, broken plasterboard edges, fixing residue
Operatives
6 · MED
Cut-resistant gloves Level C, prompt skip disposal, controlled dismantling sequence, area swept hourly.
2 · LOW
T03
Penetrations, builders work & first-fix containmentCore drilling and cutting for new services penetrations, M&E containment first-fix.
4 HAZARDS
ID
Hazard
Persons at risk
Initial
Control measures
Residual
H3.1
Hidden services strike — drilling and cuttingLive cabling, water pipes, gas not anticipated
Operatives, occupants
15 · HIGH
Drawings reviewed, cable detection scan before every penetration, controlled drilling, both sides of slab inspected where possible, supervisor sign-off.
5 · MED
H3.2
Silica dust from concrete drillingSlab penetrations, concrete cutting
Operatives
12 · HIGH
Wet drilling or M-class extraction at point of cut, FFP3 RPE, exposure time controls, no dry sweeping, area damp-down.
4 · LOW
H3.3
Falling debris through penetrationsDrilled cores, debris through new openings
Persons below
9 · MED
Catch trays / bagging at penetration, exclusion zone below, sequenced working — no concurrent below.
3 · LOW
H3.4
Working at height — containment installationCeiling void cable tray, conduit
Operatives
12 · HIGH
Podium steps or mobile tower, IPAF/PASMA where applicable, three-point contact, tool tethering.
4 · LOW
T04
Partition installation — metal stud, plasterboard, taped jointsNew partition build to revised floor plan — full-height stud + plasterboard, acoustic infill.
5 HAZARDS
ID
Hazard
Persons at risk
Initial
Control measures
Residual
H4.1
Manual handling — plasterboard sheetsRepetitive lifts, awkward sheets
Operatives
9 · MED
Mechanical board lift / plasterboard hoist, two-person lift, planned cutting station, MH refresher.
3 · LOW
H4.2
Power tool injury — drop saws & chop sawsCutting metal stud and plasterboard
Operatives
12 · HIGH
Trained operatives only, guards in place, PPE (eye, hearing), fixed cutting station with extraction, pre-use inspection.
4 · LOW
H4.3
Dust from plasterboard cutting & finishingCutting, sanding, joint finishing
Operatives, occupants
9 · MED
Local extraction at saw, M-class vacuum on sander, isolation hoarding, no dry sweeping, FFP3 RPE during sanding.
3 · LOW
H4.4
Acoustic insulation handling — fibre exposureMineral wool, glass wool
Operatives
6 · MED
Long sleeves, gloves, FFP3 RPE during installation, post-task washing, COSHH brief.
2 · LOW
H4.5
Working at height — partition headsStud installation at slab soffit
Operatives
9 · MED
Podium steps to within 0.5m of soffit, IPAF if mobile tower required, three-point contact.
3 · LOW
T05
Suspended ceiling installationGrid installation, tile drop-in, perimeter trims, integration with M&E.
4 HAZARDS
ID
Hazard
Persons at risk
Initial
Control measures
Residual
H5.1
Working at height throughoutGrid installation, tile drop, perimeter trim
Operatives
12 · HIGH
Podium steps, mobile towers, edge protection, controlled access — no climbing on grid, IPAF where required.
4 · LOW
H5.2
Falling tools & materialsHand tools, grid sections, ceiling tiles
Persons below
9 · MED
Tool tethering, exclusion zone below, no overhead concurrent working, hourly housekeeping.
3 · LOW
H5.3
Eye injury from drop-in installationDust, particles, sharp edges
Operatives
6 · MED
Eye protection mandatory, lighting maintained, controlled cutting at floor level only.
2 · LOW
H5.4
Coordination clash with M&E first-fixSequence dependencies
Programme risk; H&S incident if rushed
8 · MED
Pre-installation coordination meeting, agreed sequence, no working over live M&E activity, weekly programme review.
3 · LOW
T06
M&E first fix — power, data, lightingCable pulling, lighting suspension, power point first fix, data containment population.
4 HAZARDS
ID
Hazard
Persons at risk
Initial
Control measures
Residual
H6.1
Electrical hazard — adjacent live circuitsLive distribution boards, existing circuits
Operatives, electricians
16 · VH
NICEIC competent persons, safe isolation procedure, prove dead, lock-off/tag-off, permits to work for any live working, no novices on live work.
6 · MED
H6.2
Working at height — lighting installationPendants, recessed luminaires, emergency lighting
Operatives
12 · HIGH
Podium steps, IPAF where required, no climbing on ceiling grid, three-point contact, tool tethering.
4 · LOW
H6.3
Manual handling — cable drums, containmentHeavy drums, awkward installation
Operatives
9 · MED
Mechanical drum stand, team lifts, planned route, MH brief, breaks.
3 · LOW
H6.4
Energisation before mechanical completionPremature live testing
Operatives, occupants
9 · MED
Formal hold point — no energisation until all containment closed, joints checked, panel signed off.
3 · LOW
T07
Floor finishes — raised access floor & carpetLift, modify and reset raised access tiles; new carpet tile installation; grommets and floor boxes.
4 HAZARDS
ID
Hazard
Persons at risk
Initial
Control measures
Residual
H7.1
Open void at floor — tile liftedWorking area with open access voids
Operatives, others on site
12 · HIGH
One tile at a time, immediate replacement, lift sticks visible, void hazard signage, end-of-day no open voids.
4 · LOW
H7.2
Manual handling — repetitive tile liftsRepetitive lifting, awkward postures
Operatives
9 · MED
Mechanical lift assist, two-person on heavy tiles, rotation of tasks, MH brief refresher.
3 · LOW
H7.3
Adhesive fumes during carpet installSolvent-based adhesives if used
Operatives, occupants
8 · MED
Low-VOC products specified, ventilation, work in unoccupied areas only, COSHH on file, RPE if confined.
3 · LOW
H7.4
Sharp tools — knives & cuttersCarpet trimming, knife cuts
Operatives
6 · MED
Safety knives with retracting blade, cut-resistant gloves, controlled cutting against straight edge, sharps bins.
2 · LOW
T08
Final commissioning, snag close-out & handoverM&E commissioning, lighting commissioning, snag close, deep clean, client handover.
3 HAZARDS
ID
Hazard
Persons at risk
Initial
Control measures
Residual
H8.1
Live energisation for commissioningFirst start-up, lighting test, power-up
Operatives, occupants
9 · MED
Controlled start-up sequence, NICEIC certification before energisation, area cleared during live test, supervisor authority to abort.
3 · LOW
H8.2
Slips on cleaning chemicalsWet floor during deep clean
Operatives, client reps
6 · MED
Wet-floor signage, cleaning out of hours where possible, area cordoned during wash, low-VOC products.
2 · LOW
H8.3
Incomplete handover documentationO&M / certificates missing at handover
Client; risk to subsequent operation
6 · MED
Output 10 (Evidence Pack Checklist) signed off before handover, documentation pack assembled, witness walk-around.
2 · LOW
Risk methodology
Likelihood × Severity = Risk score. Residual risk reviewed after controls are in place. Initial scores indicate the inherent risk of each hazard before controls; residual scores demonstrate the effectiveness of the controls. Dynamic risk assessment is undertaken daily; this matrix is the baseline and is reviewed if site conditions, scope or programme change.
Conclusion
After implementation of the listed controls, all 33 hazards reduce from initial high or very-high in 12 cases to a maximum of medium residual risk. The matrix is task-specific, controls are actionable, and residual risks are within the agreed acceptance threshold for occupied-building Cat B fit-out works.
Prepared by — Built AI
Matrix author confirmation
This matrix has been generated from the approved Output 01 Intake and Output 02 Task Sequence, drafted with AI assistance and reviewed by a competent person. It is task-specific and ready for client / approver review.
Author + role Signature + dateApprover — competent person
Approval for issue
I confirm I am the competent person responsible for approving this matrix as part of the wider RAMS pack. The hazards and controls are appropriate, task-specific and demonstrate ALARP. Approved for issue.
Approver + competency Signature + date