Environmental and Weather Conditions Flashcards

According to most EWP manufacturer specifications and Australian standards, operations should cease when wind speed exceeds which threshold?

Answer: 12.5 m/s (45 km/h)

Most EWP manufacturers specify a maximum operating wind speed of 12.5 m/s (45 km/h), though operators must always verify the specific limit in the machine's manual.

EWP operations should be suspended if a lightning strike is observed within approximately what distance from the worksite?

Answer: 8 km

Australian industry safe work guidelines recommend ceasing EWP operations when lightning is within 8 km, as an elevated platform presents a significant electrocution risk.

What effect does rain have on the safe operation of an EWP?

Answer: It reduces traction and stability and may affect electrical components

Rain reduces ground traction, can soften the ground beneath outriggers, and may compromise electrical components, all of which increase the risk of EWP incidents.

Why is it important to check local weather forecasts before commencing EWP operations?

Answer: To anticipate weather changes that could affect safe operation throughout the shift

Checking forecasts allows the PCBU, supervisor, and operator to plan work around dangerous weather windows and prepare contingency procedures before operations begin.

Which condition would most significantly increase the risk of EWP instability when working at height?

Answer: Strong gusty winds combined with a fully elevated and extended boom

Gusty wind forces acting on a fully extended boom create maximum leverage and lateral load, significantly increasing the risk of the EWP overturning.

When operating an EWP in extremely hot conditions, what hazard must operators be particularly aware of?

Answer: Hydraulic fluid overheating, which can affect machine performance and cause seal failure

High ambient temperatures can cause hydraulic fluid to overheat, degrading its viscosity and potentially causing seal failures or loss of control over platform movements.

What action must an EWP operator take when unexpected adverse weather develops while they are elevated?

Answer: Carefully lower the platform to ground level and cease operations immediately

When adverse weather develops, the operator must lower the platform immediately, as remaining elevated increases exposure to wind, lightning, and instability risks.