3D Scanning (LiDAR) Safety

LiDAR (Light Detection and Ranging) scanning creates detailed 3D models of structures, terrain, and excavations.
Scanners emit laser pulses — most construction-grade units use Class 1 or Class 3R lasers.
Class 3R lasers can cause eye injury if the beam is viewed directly at close range for extended periods.
LiDAR scanning often requires the operator to position equipment in hazardous locations for optimal coverage.
Scanning from height on scaffolds, rooftops, or elevated platforms introduces fall-from-height risks.
Equipment is valuable and heavy — a typical scanner with tripod weighs 15–25 kg requiring careful handling.
Scanning in live traffic areas, near excavations, or at rail sites requires location-specific risk controls.
Survey targets and reference spheres placed around the scan area must not create trip hazards.
Data processing does not need to happen on site — minimise time in hazardous locations by scanning efficiently.
Battery-powered scanners eliminate trailing cable hazards but require charged spare batteries.

Laser safety	Direct eye exposure to Class 3R laser beams can cause temporary or permanent retinal damage.
Hazardous locations	Achieving comprehensive scan coverage requires positioning equipment in areas with falls, traffic, or plant hazards.
Manual handling	Carrying heavy scanning equipment across uneven site terrain causes musculoskeletal injuries.

Do

Don't

Check the laser classification of the scanner and follow the safety precautions for that class
Avoid looking directly into the laser beam or directing it towards other workers' eyes
Complete a risk assessment for each scan location considering falls, traffic, and plant
Use safe working platforms or MEWPs for elevated scan positions rather than improvising
Carry scanning equipment using appropriate bags or cases with shoulder straps
Place survey targets where they will not create trip hazards for other site workers
Wear high-visibility clothing and coordinate with site management when scanning near plant
Minimise time spent in hazardous scan positions by planning scan setups efficiently
Secure the scanner tripod on level ground to prevent it toppling in wind
Brief nearby workers that laser scanning is in progress and to avoid looking at the beam

DON'T stare directly into the laser beam output of any scanning device
DON'T position the scanner where the beam could sweep across other workers at eye level
DON'T access elevated scan positions without fall protection and safe access equipment
DON'T carry the scanner and tripod simultaneously across rough ground — make two trips
DON'T set up in live traffic areas without traffic management or an escort in place
DON'T leave the scanner unattended on a tripod in windy conditions — it can blow over
DON'T place reference targets in walkways where they become trip hazards
DON'T scan near reflective surfaces without warning others about potential beam deflection
DON'T ignore site-specific induction requirements when scanning at unfamiliar locations
DON'T rush setup in hazardous locations — plan the scan to minimise exposure time

See also: Surveying Safety Awareness | Laser Level and Rotating Laser Safety

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