O
Open-Graded Aggregate
Porous aggregate mix encouraging binder penetration and retention.
Optical Wet Film Gauge
Gauge for wet film in transparent coatings.
Overhead Boom Mount
Structural mount supporting the gully-suction boom at roof level. Designed to pivot for stowage and includes a safety-locking pin.
Open-Nozzle Pattern
Fan shape of spray pattern with specific overlap.
Outgassing (Substrate)
Vapour release causing bubbles/voids under markings.
Overhead Clearance Alarm
Warns before tipping hopper under bridges or cables.
Operator Access Step
Folding step giving safe access to fuel or water filler points. Features anti-slip surface and handholds to meet safety standards.
Outrigger Brush
Side brush mounted on extendable outrigger.
Overhead Obstruction Sensor
Ultrasonic sensor detecting bridges or tree branches during hopper tipping. Prevents damage and meets UK HSE safety guidance.
Operator Daily Checklist
Checklist completed by drivers before leaving the depot. Covers lights tyres fluid levels and safety equipment to meet operator licensing rules.
