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Extensive application of Rahmen structure to high-rise apartments provides opportunity for Wood Infill Wall market

Jae Choi

By Jae Choi

Technical Consultant/ Canada Wood Korea

April 5, 2019

In February, the Korean government and Korea Land & Housing Corporation (LH) announced that they will apply the Rahmen structure extensively to the building design. Unlike the shear wall structure, the Rahmen structure is a post-and-lintel structure, in which two upright members, the posts, hold up a third member, the lintel, laid horizontally across their top surfaces to create open space for non-load bearing infill walls. This type of building structure is flexible in changing the internal partition walls that correspond with the government’s Long Lasting Housing Policy.

One of the key advantages the Rahmen structure offers is the noise control between floors. Unlike sheathing wall system, the sound doesn’t transfer through load-bearing walls thus creates a better sound control performance. An Land & Housing Corporation officer said, “We now have to supply more rental houses in downtown where land are usually small, and it means the Rahmen structure will allow a floor to be broken down into smaller units”, he explained further that more apartment units will apply Rahmen structure from now on.

If the government and Korea Land & Housing Corporation expand the application of the Rahmen structure as they have announced, it is expected that construction companies and the general public would have more interest in the wood infill wall solution that Canada Wood has promoted for years. Wood infill wall works perfectly with Rahmen structure as non-load bearing wall components because of its lightweight, prefabrication and structural stability.

The three-storey Dagagu (multi-household) house, to be completed soon is a good example showing the growth potential of wood infill wall application to Rahmen structure.

The Dagagu house designed through the technical support provided by Canada Wood is a type of housing commonly found in Korea. The main structure of this three-storey Dagagu house was built with light wood frame walls, floors, and roof. This house was built prior to the enforcement of the law that intensifies the sound control requirement. The current new law rules out the possibility to use wood frame floor system in the Dagagu house.

However, wood infill wall demonstrates potential in Rahmen structure as it resolves the issue of sound control between floors. Canada Wood will work extensively to penetrate this market by providing continuous technical support and marketing promotions.