Precast bridge beams Hoisting Beams: the "steel ruler" for stable lifting of thousands of tons and precise bridge construction
In the race for prefabricated bridge construction, precast beam hoisting is a crucial step in determining both construction time and quality. The "wobble, deflection, and weakness" of traditional hoists (hoisting shake leading to beam cracking, misalignment leading to rework, and insufficient load-bearing capacity creating hidden dangers) act like a shackle. Specialized lifting beams for precast bridge beams, with their robust design featuring "rigid and stable hoisting, millimeter-level alignment, and versatility in all working conditions," provide a dual guarantee of safety and efficiency for the "aerial puzzle" of high-speed rail, highway, and cross-sea bridges.
Thousand-ton Rigid Load-Bearing Capacity: The Guarantee of "Zero Damage" to the Beam
✅ Military-Grade Materials + Structure:
The main body is constructed of Q460C high-strength steel and welded throughout. Through robotic laser welding and ultrasonic testing, the welds achieve a 100% pass rate. The box beam design increases torsional rigidity by 30%. Combined with a symmetrical layout of multiple lifting points (e.g., a 30m box beam has four sets of synchronized lifting points), the beam's weight is evenly distributed, ensuring stress fluctuations of ≤5% during lifting, eliminating localized compression cracking.
✅ Overload and Anti-slip Dual Safety:
A built-in pressure sensor triggers audible and visual alarms when the load exceeds the rated value by 10%, and a forced power outage occurs at 15%. (For example, a 500-ton hoist will trigger an alarm at 475 tons and lock directly at 525 tons.)
The lifting lugs are equipped with mechanical anti-slip locks that automatically lock in the event of vibration or impact. Even if the chain breaks, they can still temporarily support the beam for 30 seconds (golden time for emergency response).
Full-Scenario Adaptability: A "Universal Lifter" for Everything from Box Girders to Special-Shaped Girders
🌉 Compatible with All Beam Types:
The quick-change spreader head is compatible with precast girders with special shapes, including 30m box girders, 40m T-shaped girders, and small-radius curved girders. Even customized simultaneous lifting of two girders is possible (doubling efficiency and adapting to parallel operations in multiple girder yards).
🌉 Breakthrough Working Conditions:
Narrow Sites: The folding lug design reduces the width from 3m to 1.5m when navigating tunnels and piers, enabling flexible maneuverability.
Coastal/Highly Corrosive Environments: The surface is sprayed with a graphene anti-corrosion coating and has been salt spray tested for over 2,000 hours, providing resistance to sea breezes and acid rain.
Extreme Loads: Supports static load testing up to 1.25 times the rated load (e.g., a 500-ton spreader undergoes a 625-ton extreme test) to verify safety margins.