The Koryo (rainbow beam) is a type of beam that supports the load of the roof, and is so called because it arches upward like a rainbow. As time went by, it has become more of a decorative element.
What is Koryo?
The Koryo (rainbow beam) is a type of beam that supports the load of the roof, and is so called because it arches upward like a rainbow. As time went by, it has become more of a decorative element.