Case Study: Scaling the Sky - How HYTORC Revolutionized Bolting on One of the World’s Tallest Rail Bridges
Constructing one of the tallest railway bridges in the world was more than an engineering feat; it was a battle against geography and physics. Standing at a staggering 359 meters above the Chenab River in one of India’s most challenging terrains, the structural integrity of this landmark depended greatly on one critical factor - the precision of 600,000 HSFG (High Strength Friction Grip) bolts.
When manual bolting methods threatened to delay the timeline and compromise quality, the customer turned to a smarter, faster solution. Here’s how advanced torque and angle technology transformed this landmark project.
Challenge: 600,000 Bolts, Zero Room for Error
Building a bridge of this scale involved massive structural segments secured by M24, M30, and M36 bolts. The technical requirement was strict: a pre-torque + 90° angle tightening parameter.
Initially, the process was a laborious manual marathon. First, all bolts were snug-tightened with a manual wrench. Next, pre-torque was applied. Then, every single nut had to be hand-marked for a 90° turn.
This traditional manual bolting method created several massive bottlenecks for the project team. Speed was the primary issue, as teams could only finish roughly 150 nuts per day. With 600,000 bolts to manage, the risk of human errors, such as skipping a bolt or marking one incorrectly, was a constant concern.
The customer was satisfied with the front reaction tech, with track pad fixture that helped them avoid all possibilities of hand injuries. When it comes to critical bolting, the customer always prefers HYTORC! - Anuj Gupta, Country Manager, HYTORC India
HYTORC Solution: Automated Precision with HYTORC
To overcome these hurdles, the project shifted from standard manual tools to the HYTORC VECTOR Torque and Angle Documentation Pump paired with HYTORC hydraulic wrenches. This system replaced guesswork with digital precision, especially since the tools were upgraded to be equipped with slider-type reaction fixtures. Unlike standard tools, this setup allowed for better torque delivery in tight spaces where traditional reaction arms couldn't find a solid footing.
Results: Faster and Safer
By switching to HYTORC tools, the project saw immediate improvements in these key areas:
1. Massive Time Savings: Using HYTORC tools eliminated the need for manual marking and step-by-step pressure adjustments. This resulted in a 40% to 50% reduction in overall bolting time for each bridge segment, keeping the project on its ambitious schedule.
2. Enhanced Site Safety: In high-altitude, high-wind environments, safety was paramount. The use of HYTORC hydraulic torque wrenches with a customized reaction arm greatly eliminated crush points, the leading cause of hand injuries in bolting. This made the operation significantly safer for the crew on the front lines.
Engineering the Future
On a landmark project like one of the world’s tallest railway bridges, "good enough" wasn't an option. Their purchase of HYTORC hydraulic torque tools meant that the customer was able to ensure that each of the 600,000 HSFG bolts was set to perfection. The result was a landmark bridge built to last for generations.
Upgrade Your Bolting Precision Today
Don't let manual errors and slow documentation hold back your landmark projects. Whether you are working on high-altitude bridges or heavy industrial infrastructure, HYTORC’s bolting solutions can give you 100% traceability and maximum safety.
Contact our team today for a demonstration.
