The federal Occupational Safety and Health Administration has fined three construction firms more than $300,000 for safety violations that led to the deadly crane collapse in March.

OSHA fined Rapetti Rigging $220,000 for failing to inspect a $40 nylon sling that was torn and gave way – leading to the collapse.

OSHA also cited two other companies – the Reliance Construction Group and Joy Contractors –for not having proper protections in place.

Seven people were killed when the crane came down in the busy Turtle Bay neighborhood.