IPAF Safe Working Load & Stability

Question 1

What is the Safe Working Load (SWL) of a MEWP?

Accepted Answer

The maximum total weight (persons, tools, and materials) that the platform is rated to carry safely

Answer

The maximum weight of a single person on the platform

Answer

The maximum height the MEWP can reach

Answer

The maximum wind speed at which the MEWP can operate

Question 2

A MEWP has a platform SWL of 230 kg. Two workers each weigh 90 kg. They wish to take 80 kg of materials onto the platform. Is this within the SWL?

Accepted Answer

No — the total is 260 kg, which exceeds the 230 kg SWL

Answer

Yes — the total is 230 kg exactly, which is acceptable

Answer

Yes — materials are not counted toward the SWL

Answer

No — only one person is allowed on a MEWP at any time

Question 3

How does wind speed affect MEWP stability and safe operation?

Accepted Answer

Wind creates lateral forces on the platform and operator that increase overturning risk — operation must stop when wind exceeds the manufacturer's limit

Answer

Wind only affects tall boom lifts, not scissor lifts

Answer

Wind speed only matters if the MEWP is near a building

Answer

Only gusts above 60 mph are a concern

Question 4

Why does the SWL of a boom lift decrease as the boom is extended to greater radii?

Accepted Answer

Greater outreach increases the overturning moment — the machine's stability limits what it can safely lift at each radius

Answer

SWL increases with outreach because the machine is more stable when extended

Answer

SWL is constant regardless of boom position

Answer

Outreach only affects lift speed, not capacity

Question 5

What is the significance of the manufacturer's load chart for a MEWP?

Accepted Answer

It shows the maximum safe load at different heights and outreach positions, enabling operators to verify the planned operation is within safe limits

Answer

Load charts are only required for cranes, not MEWPs

Answer

It shows fuel consumption at different heights

Answer

Load charts are advisory only

Question 6

What does the MEWP's 'maximum platform height' mean?

Accepted Answer

The highest point to which the platform floor can be raised — not the maximum safe working height for all conditions

Answer

The maximum height at which full SWL can be utilised

Answer

The maximum height in all wind conditions

Answer

The height of the platform cage sides