Recent Blogs
Swing Derrick Mechanism Explained: Mast, Boom, Bull Wheel Parts, How It Works, and Lift Capacity
Swing derrick explained — boom geometry, slewing radius, and load math for construction crews lifting heavy material on tight urban jobsites.
Post Crane Mechanism Explained: How a Jib Mast Crane Lifts Poles, Fence Posts and Well Casings
A Post Crane is a fixed-mast jib crane for fence posts, utility poles and tower work. See how it works, lift formula, real applications and...
Four-guy Mast Derrick Mechanism Explained: Parts, Guy Tension Formula, and Rigging Diagram
Four-guy mast derricks lift heavy loads on construction, salvage, and rigging jobs. Learn the geometry, guy tensions, and a worked sizing example.
Automatic Balance Crane Mechanism: How It Works, Parts, Formula, and Uses Explained
How an Automatic Balance Crane works in construction lifting — counterweight geometry, load moment balance, formulas, worked example, and design tradeoffs.
Travelling Derrick Mechanism: How a Rail-Mounted Mast and Boom Crane Works, Parts and Uses
Travelling Derrick explained — how the rolling mast crane lifts and tracks loads along rails in mills, lumberyards, and steelworks. Specs, formulas, and real builds.