How to spot 'Spider Web' steel cracks during a pre-purchase crane inspection?
Spider web cracks appear as radiating fracture patterns from stress concentration points, typically at weld joints, pin holes, and boom sections.
Spider web cracks manifest as multiple hairline fractures radiating outward from a central point, resembling an actual spider web pattern. These fatigue cracks most commonly develop at high-stress locations including boom-to-turntable connections, outrigger mounting points, load block attachment areas, and around pin holes in boom sections. The cracks typically start as barely visible surface lines that gradually extend and interconnect under repeated loading cycles.
Remember: "WEB cracks: Weld joints, pin holE holes, Boom sections - where spider patterns appear"
Keywords
Operators: Add your profile to get matched with jobs. Free.