Lotte Construction and POSCO Construction Obtain New Technology Certification for 'D-Deck Method'

The scene of the Didek construction method being applied on site.

[Asia Economy Reporter Donghyun Choi] Lotte Construction and POSCO Construction announced on the 13th that they obtained construction new technology certification from the Ministry of Land, Infrastructure and Transport on the 2nd for the long-span formwork deck plate method (D-Deck method) technology.

This technology simplifies the work process by constructing structures with long-span (wide spacing between beams) deck plates during floor construction. Lotte Construction, along with POSCO Construction, developed this technology through joint research with Deonaeun Structural Engineering, Samwoo CM Architectural Office, and N.I. Steel.

The newly developed method involves placing double rib corrugated steel plates (deck plates with two ribs per 600mm unit width) spanning 8 to 9 meters on temporary support columns. What distinguishes this method from existing ones is the use of POSCO's GI-ACE steel plates for vehicles, which enhances the formability of the deck. Additionally, the construction process is carried out without welding by simply installing inverted triangular lattice girders between the ribs, ensuring shortened construction time and improved workability. This construction method reduces the construction period by 40% compared to conventional formwork methods and by 20% compared to existing deck methods. Furthermore, it increases the structure's load-bearing capacity, reducing deflection and crack occurrence, thereby improving safety.

This new technology is highly applicable to underground parking lots of apartment complexes, office buildings, and commercial buildings. In fact, it has been applied to multiple sites such as ‘Gireum Lotte Castle Clacia’ and ‘Pyeongtaek The Sharp Central Park,’ significantly shortening construction periods.

A Lotte Construction official stated, “This new technology simultaneously secures workability and economic efficiency by reducing construction time and dramatically improving on-site work efficiency,” adding, “It can be installed with minimal manpower without the aid of equipment such as tower cranes.”

This content was produced with the assistance of AI translation services.