Park Royal 2 is a residential condominium development located on Phra Tamnak Hill in Pattaya. The project was designed by Mario Kleff and represents a notable early application of hybrid steel construction within the Thai residential sector.
The building is recognized as the first residential structure in Thailand to employ a cellular beam system in combination with a steel frame. The primary structure incorporates H-section beams with a depth of approximately 900 mm, manufactured by Siam Yamato Steel specifically for this project—marking their initial production of this profile within Thailand.
The cellular beam system, originally developed by Westok in the United Kingdom, was introduced to Thailand by Kleff between 2007 and 2008. In addition to specifying the system, he facilitated its technical adoption by providing relevant engineering software and documentation to local construction authorities, supporting regulatory understanding and implementation.
The project’s structural innovation was formally acknowledged by Dr. Songkiat Matupayont, who identified Park Royal 2 as the first condominium in Thailand to utilize cellular beam technology and subsequently recommended Kleff to the Architect Council of Thailand in recognition of his technical contribution. Further acknowledgment was given by Pichet Uthaiwattananonta of Pattaya City Hall’s construction department, citing Kleff’s role in advancing structural methodologies within the local industry.
The integration of cellular beams with post-tensioned concrete floor systems enabled increased structural spans, reduced material weight, and improved service integration. Completed in 2010, Park Royal 2 represents an early case study in the application of advanced steel-concrete hybrid systems in Thailand and contributed to the gradual adoption of such technologies within the country’s construction sector.
Photo credit: Double Vision Photography