By Deke Black, P.E.
Banging bolt syndrome happens when structural bolts, usually in a beam shear tab, slip from a friction condition into a bearing condition — the transition occurs instantaneously, releasing strain energy which creates a loud banging noise that sounds similar to a gunshot. The violent transition is followed by a small vibration in the building in the area of the connection. The noise and vibration associated with this phenomenon while very disturbing to building occupants is not something to be concerned about.
The grand opening of the new 3 story Class-A office building located at 3025 Clearview Way in San Mateo was in late September 2016. The new building provides spectacular views of the bay area from its elevated bluff located just off highway 92 in San Mateo. The hilltop site provided many construction challenges for general contractor Build Group, but they were up to the task. Build Group constructed both the new office building and a 5-story precast parking garage on the same site at the same time while the campus was occupied. This complex site requires a unique building foundation which employs a unique combination of micro-piles and spread footings. The building is a steel frame and utilizes a Nippon Unbonded Braced Framed (buckling restrained brace frame) lateral system.
During the past 18 years, Buckling-Restrained Braced Frames (BRBFs) have been used extensively in the United States as part of the seismic force-resisting system for buildings in regions of high seismicity. One of the first new construction projects in Montana that employed BRBFs was the Mill Street Lofts building located in north of downtown Bozeman. The Mill Street Lofts building construction was the first phase of a multi-phase urban renewal projects to revitalize an older, industrial sector of the city. The vision that the owner/developer, Mill District Partners, LLC had for the greater project was a main street lined with buildings, which paid tribute to the industrial sector while creating the look and feel of a downtown main street. Comma-Q Architecture, Inc. took on the role as lead designers and project managers for this project. Nishkian Monks served as the structural design consultant providing development and design of the structural system, construction administration, and special inspection of the building design collaborating with general contractor Martel Construction, Inc.
The SCU Arts and Art History building is a new three story structure with classrooms and studios for faculty and staff at Santa Clara University located in Santa Clara, California. The architectural design was completed by Form4 Architecture Inc. The structure is a traditional steel framed building with buckling restrained braced frames serving as the lateral force resisting system. Notable features include the domed/mansard roof clad in Spanish tile and a custom designed Chihuly sculpture hung over the entrance lobby. The SCU Arts building is one of a several projects where we serve as the structural consultants for Santa Clara University.
Construction on the project has recently begun with Devcon Inc. serving as the contractor. The preconstruction phase began in December 2014 with an emphasis on reducing construction costs with value engineering and coordinating subtle detailing items between architect, contractor, and structural engineering disciplines.