PACO Steel and Engineering Corp. has also developed a pre-engineered, pre-fabricated and cost-effective bolted together Special Concentric Braced Frame (SCBF) to resist lateral loads with higher magnitude.

PACO Special Concentric Braced Frames are designed in accordance with chapter F of AISC 341-10 seismic provisions. All connections will be bolted which allows fast installation in the field and eliminates the need for welding.Concentric Braced Frame systems tend to be more economical than eccentrically braced frames in terms of material, fabrication and erection costs. They are typically located in the walls that occur in the core area around stair and elevator shafts. This generally allows for greater architectural flexibility in placement and configuration of exterior windows and claddings.

Special Concentric Braced Frames may be utilized in dual systems togeth-er with special moment frames in all seismic design categories with no limitation in the building height. This gives EOR the benefit of using a value of 7 for response modification factor (R=7). PACO will provide the EOR, calculations, submittal documents and detail drawings for the Special Concentric Braced Frames and their attachments to the foundation. This will reduce design time for the engineer and provide a cost-effective solution for lateral loads with higher magnitude.