Sei 31 03 Seismic Evaluation Of Existing Buildings ....pdf -

They crawled through ceiling plenums, tapped columns for hollow sounds, measured rebar cover with a pachometer. In the basement, behind a boiler, they found something unexpected: a seam in the foundation where an original wing had been cut away in 1985.

SEI 31-03 says: if Tier 1 flags a problem, you either go to Tier 2 (a more detailed analytical evaluation) or Tier 3 (full structural modeling). She had 30 days left. Back in the office, Elena built a model in SAP2000. She ran a response-spectrum analysis for a 475‑year earthquake — the “design basis” event. Then she applied the m and q factors from SEI 31-03: knowledge factors for concrete with unknown rebar anchorage. SEI 31 03 Seismic Evaluation of Existing Buildings ....pdf

She stared at the red contours on her screen. They crawled through ceiling plenums, tapped columns for