Six-Axle All-Terrain Crane Overturns in São Paulo, Boom Falls onto Monorail and Road
30 Second Takeaway
A six-axle all-terrain crane overturned at the Cortesia Equipamentos yard in São Paulo on Saturday, October 24, with its fully extended boom falling across the elevated track of the Line 15-Silver Monorail. A driverless train struck the boom, which then fell onto the road below. The crane operator injured his foot after jumping clear; no injuries were reported among train passengers or road users. Police are investigating, and the cause of the overturn has not been confirmed.
Incident Overview
São Paulo, Brazil
A large all-terrain crane overturned at the Cortesia Equipamentos yard beside the Line 15-Silver Monorail. Its fully extended boom fell onto the elevated track, where it was struck by a passing train before falling onto the road below.
The crane is reported to have been a six-axle machine with a capacity of either 300 or 400 tonnes. The exact model and configuration have not been confirmed.
What Happened
Based on information available at the time of publication:
The crane overturned at the Cortesia Equipamentos yard in São Paulo on Saturday, October 24.
The six-axle all-terrain crane had its main boom fully extended over the front.
The boom fell onto the elevated track of the Line 15-Silver Monorail.
A driverless train struck the boom, sending it down onto the road and passing traffic below.
The crane operator jumped clear and injured his foot.
No injuries were reported among train passengers or road users.
The overturn also damaged at least nine other mobile cranes in the yard; at least two appeared badly damaged.
Police opened an investigation into the incident.
What Is Known
Equipment involved: Six-axle all-terrain crane; reported capacity of either 300 or 400 tonnes.
Incident type: Crane overturn, followed by boom impact with a passing monorail train.
Location: Cortesia Equipamentos yard beside the Line 15-Silver Monorail in São Paulo, Brazil.
Boom configuration: Main boom fully extended; the number of sections has not been confirmed.
Injuries: The crane operator injured his foot after jumping clear. No injuries were reported among train passengers or road users.
Damage: The boom fell onto the road; at least nine other mobile cranes in the yard were damaged.
Investigation status: São Paulo police are investigating. The site was examined by police technical experts.
Company response: Cortesia said it regretted the incident and was cooperating with authorities.
Early Observations
Police initially reported that the ground gave way beneath the crane’s outriggers on one side. Images of the yard are not clear enough to establish the outrigger configuration, though a preliminary review suggested the crane may have been short-rigged on that side. This has not been confirmed by investigators.
The cause of the overturn remains under investigation. The monorail track was inspected and returned to service later that day at reduced speeds, according to reports. The road was cleared by Sunday.
Why This Incident Was Possible
The specific cause of the overturn has not been established. In crane overturn investigations, engineers and authorities may examine factors such as:
Ground bearing capacity and any ground failure beneath the outriggers
Outrigger extension and the support footprint used for the crane configuration
Whether the ground was level and suitable for the crane’s setup
Boom position, load conditions and the applicable load chart
Crane setup records, inspection history and operating procedures
These are general areas investigators may review in an overturn; they are not confirmed causes in this incident.
Industry Reminder
Crane stability depends on suitable ground conditions, correct outrigger support and operation within the crane’s rated configuration. Ground conditions should be assessed before setup, and outrigger deployment should match the applicable load chart and manufacturer instructions.
When cranes operate beside roads or rail lines, lift planning should also account for the consequences of a crane or load entering those areas. Exclusion zones and coordination with site, road and rail authorities can help protect workers and the public.
Editorial Note
Crane Hub Global reports on crane accidents, crane collapses and lifting-related incidents to support industry awareness, learning and prevention.
This article is based on information available at the time of publication. The cause remains under investigation and may be clarified as authorities, the crane owner and other parties release further findings.
How Crane Overturns Can Be Prevented
Assess ground conditions before setup
Confirm that the ground can support the crane and outrigger reactions. Investigate buried services, voids or other conditions that could affect support.
Set outriggers to the planned configuration
Deploy outriggers and support mats as required by the crane’s load chart and lift plan. Confirm the actual setup before lifting.
Use the correct load chart and configuration
Check that boom position, outrigger extension, counterweight and operating conditions match the chart being used.
Inspect the setup before operation
Have qualified personnel verify the crane’s support, level and configuration before work begins, and repeat checks if site conditions change.
Plan for nearby public infrastructure
Identify roads, rail lines and other exposed areas around the crane. Coordinate access restrictions and exclusion zones with the relevant authorities.
Stop work when conditions changePause operations if the ground settles, the crane shifts, supports move or other unexpected conditions arise. Reassess the setup before resuming.
