Bando Construction and Partners Jointly Receive Ministry of Land's New Technology Certification for 'Height-Adjustable Bar Chair'

'Height-adjustable bar chair' installation scene

Bando Construction announced on the 9th that it has developed a reinforced concrete structure with enhanced safety and practicality called the height-adjustable bar chair in collaboration with Baro Construction Technology Co., Ltd. and A&U CM Architects, and received a 'New Technology Designation Certificate' from the Ministry of Land, Infrastructure and Transport. A bar chair is a device used at construction sites to fix rebar in place when pouring concrete.

The 'hat-shaped bar chair' and 'H-shaped steel' mainly used for foundation rebar work over 1.5m in height at construction sites are known to have difficulties in height adjustment and pose a high risk of accidents when the upper rebar load is concentrated on some bar chairs.

The height-adjustable bar chair addresses these shortcomings by allowing vertical (within 150mm) and horizontal (within 56mm) adjustments to reduce floor flatness errors and lateral errors. It also enhances safety by varying the member specifications according to height, enabling each bar chair to withstand a maximum load of 5 tons.

Additionally, the height-adjustable bar chair can be installed at 3m intervals, improving construction efficiency by reducing costs and shortening construction periods compared to the existing method requiring installation at 1.2m intervals. The joining method uses dedicated clips instead of welding, minimizing risks and inconveniences caused by welding work.

The height-adjustable bar chair has been introduced at about 100 construction sites so far and is known to be preferred by on-site workers due to its safety and ease of installation.

This new technology was developed over approximately two years through joint research by Bando Construction, Baro Construction Technology Co., Ltd., and A&U CM Architects, and verified through testing by the Industry-Academic Cooperation Foundation of Sungkyunkwan University.

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