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Steel Structures

IHI delivers large steel structures incorporating machinery and put a focus on the increase of hybrid structures, including caissons and pontoons that combine the strengths of steel and concrete.


Hybrid Caisson

Steel Caisson/Hybrid Caisson

Caissons are structures installed and arranged in coastal regions as part of harbor and fishing port facilities to serve as breakwaters, quays and seawalls.

This hybrid structure, which is made from steel plates and concrete, is characterized by its high strength and durability as well as the ability to be applied to complex shapes.

IHI has a strong delivery track record due to our ability to manufacture long/big caissons in our plant and shorten manufacturing periods.

Skew plate breakwater

This is a deep-water, footed, detached breakwater that was developed with the Public Works Research Institute to prevent coastal erosion and for multipurpose utilization of coastal areas.


Floating Breakwaters

Floating breakwater

These are placed offshore to reduce or break waves. A design that is backed by maritime structural technology provides stable performance. These breakwaters provide an economical and easy-to-construct breakwater for deep water and weak seabed areas. These are environmentally friendly structures that do not disturb the sea currents.


Floating Bridges

Floating pier

Regardless of the water depth, the distance between the water surface and the crown remains constant. Therefore, there will be no height gap between ships and the quay. Also, since the pier is moored with posts, it sways very little.


Immersed Tunnels

Immersed tunnel

These are one element (box) in constructing submarine tunnels that are divided into sizes that will not impair towing and sinking. There are different types, such as hybrid steel and concrete caissons, steel-reinforced caissons, etc. (The photograph shows a steel and concrete caisson)


Mass Dampers / Seismic Isolation Floors

Seismic Isolation Floors

When an earthquake occurs, it results in huge economic losses. IHI seismic isolation floors protect computers and other important equipment from earthquakes.

Mass Dampers

Mass dampers were developed to reduce the swaying of high-rise buildings and control towers due to strong winds. IHI started the development of mass dampers early on and has an extensive record of installing them in Japan and overseas.

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