Collapsed over the train.

In the wake of the incident, a construction piece fell on a commuter train below.

Many people may suspect that

"How did this heavy thing fall?"

In elevated construction work, such as electric trains or high-speed trains,

The construction phase is not the completion of concrete.

But it's a step-by-step assembly of large parts.

How Elevation Works Build (Easy to Understand)

Modern elevated structure

Prefinished Concrete Parts (Precast Segment)

Each weighs dozens of tons.

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The main steps are

1️⃣ Launching Girl

Was mounted on top, acting as a "temporary load-bearing frame."

2️⃣ Lift the concrete piece up to hang.

The workpiece is "hung" to the machine with a specific device.

During this period, the structure has not permanently taken the weight down the pole.

3️⃣ Put the pieces together.

Use a holding, pulling and compression system so that the concrete beams become one piece.

4️⃣ When everything is complete.

Therefore temporarily disengage the device

And let the structure permanently take the weight down the pole.

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And when did the accident happen?

The most dangerous phase is

The stage at which the structure is still in a "temporary" condition.

1. During lifting

2. During hanging

3. During the movement of machinery

4. Before the structure is completely loaded.

If one step

❌ Not fully calculated.

❌ failed to meet the plan.

❌ Or insufficient stability control.

A piece of heavy weight.

May move away or lose balance.

And fall to the area below.

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Important things the public should know

Large Construction Works

Not dangerous because "the structure is not strong."

But dangerous because

The stage during construction is very complex.

Every step requires

Calculation

Planning

And strict job page control.

Because of a few mistakes.

It can affect the lives and property of those commuters below.

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Lessons from this incident

Construction accident

It's not that far.

And it's not to be overlooked, "It'll be done."

Safety during construction

Important, not allergic to structural strength when practical.

Because the highest risk

It often happens before the work is completed.

My deepest condolences to the bereaved.