Metode Erection Girder dengan Launcher Gantry Tol Semarang Demak Seksi 2

Summary

This video outlines the detailed process of girder erection using a Launcher, starting with the transfer of the girder from the stock yard to the Launcher area via trolleys. The lifting procedure, involving two 250-ton capacity cool units, is conducted with careful reinforcement and safety measures. Once the girder is secured, the Launcher moves it into position, ensuring proper alignment using surveyors. The final stages include welding, brazing, and secure installation of the girder, with careful monitoring of the deflection limits during the lift. The lifting frame is eventually removed, and the process is ready for the next girder.

Takeaways

• 😀 The girder erection process begins with mobilizing the girder from the stockyard to the launcher area using a trolley for efficiency and safety.
• 😀 The girder is lifted onto the trolley using two cool units, each with a capacity of 250 tons, ensuring a stable and safe lift.
• 😀 A lifting frame is installed correctly at a marked living point on the girder to ensure proper lifting and alignment.
• 😀 The girder is slowly placed onto two prepared trolleys, with immediate reinforcement and binding using chains and load binders for stability.
• 😀 Once the girder is placed on the trolleys, personnel check the condition of the rails to ensure a safe run towards the launcher.
• 😀 The trolleys used have a capacity of 90 tons, sufficient to carry the girder's weight safely during transport.
• 😀 After reaching the launcher area, the trolleys stop at the pre-designated location, and the lifting hook is lowered to lift the girder.
• 😀 The lifting process starts with a load test for about 10 minutes to ensure stability and proper alignment before continuing.
• 😀 The girder is moved by the launcher to its designated position on the bearing pet, with guidance from the surveyor team to ensure precise placement.
• 😀 Once the girder is in position, the welding preparation process begins, with brazing and chain tightening to secure the girder before the lifting frame is removed.

Q & A

What is the initial step in the girder erection process using the Launcher?

The initial step involves mobilizing the girder from the stock yard to the Launcher area using a trolley.

Why is a trolley used for the girder transfer to the Launcher?

A trolley is used because it is more efficient and safer for transferring the girder.

What is the lifting capacity of the units used for lifting the girder onto the trolley?

The lifting units have a capacity of 250 tons each.

What is the significance of the 'Living Point' in the girder installation process?

The Living Point, marked by the surveyor, is the specific point used for lifting the girder during the installation process.

How is the girder stabilized on the trolley after being placed?

The girder is stabilized by binding it with chains and load binders to ensure it is secure on the trolley.

What is checked while the trolley is moving toward the Launcher location?

Personnel check the condition of the rails thoroughly to ensure the trolley runs safely.

What is the capacity of the trolleys used to transport the girder?

The trolleys used have a capacity of 90 tons each.

What happens once the trolley reaches the correct position for the girder installation?

The trolley chain is released, and the lifting process begins, with the girder being lifted by the hooks of the Winch units.

Why is the 'lottest' process carried out during the lifting of the girder?

The lottest is conducted to check the initial lifting and ensure the deflection remains within the maximum limit during the lifting process.

What happens after the girder is placed on the bearing pad?

Once the girder is in place, the welding preparation process begins, followed by the brazing and installation of the racing manually.