Lattice Boom
A crane boom constructed from individual steel sections connected with pins, offering high strength-to-weight ratio for heavy lifts.
In Detail
Lattice booms are crane booms constructed from individual steel sections (typically rectangular or triangular in cross-section) connected with pins. They offer a superior strength-to-weight ratio compared to telescopic booms, enabling longer reaches and heavier lifts. Lattice boom inspection is particularly detailed — inspectors must check each section for bent or cracked chords and lacings, pin hole elongation, pin wear, and proper alignment between sections. Assembly and disassembly of lattice booms are themselves critical operations requiring qualified supervision. Environmental factors like wind, ice loading, and temperature affect lattice boom capacity.
Related Terms
Boom
The primary structural member of a crane that extends outward and upward to position the hook over the load.
Structural Inspection
Detailed examination of a crane's structural members for cracks, corrosion, deformation, and weld integrity.
Critical Lift
A crane lift that exceeds a specified percentage of rated capacity or involves unusual hazards requiring extra planning.
Annual Inspection
A comprehensive yearly inspection performed by a qualified person to assess all crane systems and components.