As-Built Structural Investigation on early 1900’s Concrete Building in Downtown L.A.

No as-built drawings were available for the design engineer to seismic retrofit this early 1900’s 3-story concrete building located in downtown Los Angeles.  CAE performed non-destructive testing to provide the structural as-built for the concrete framing members (beams and columns) and concrete slab using the Ground Penetrating Radar and selective demolition to provide construction of the framing members and slab, including details of the members’ reinforcement.

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Details of concrete beam reinforcement detected by the GPR and confirmed by exposure for size of reinforcement:

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Details of column vertical bar splices and spirals size confirmation:

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Concrete slab construction verification from small core hole sampling:

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Detailed documentation of Beam & Column findings provided as part of engineering report submitted to the design engineer:

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