The American Concrete Institute is publishing the complete draft of the proposed “ACI 318-19: Building Code Requirements for Structural Concrete” for a 45-day public review starting Dec. 21.
The proposed bypass fix for the troubled Fremont Street girders of San Francisco's Salesforce Transit Center calls for bolting 20-in.-wide steel cover plates above and below the fractured bottom flange, like a double splint.
The magnitudes 7.0 and 5.7 earthquakes that struck Anchorage, Alaska, on Nov. 30 shook buildings and shattered highways, but caused limited structural damage and no reported loss of life, mostly due to the depth and location of the quake’s epicenter, as well as the city and state’s stringent building requirements.
The Transbay Joint Powers Authority board of directors has called for a complete structural evaluation of San Francisco's 1.2-million-sq-ft transit center, closed because of fissures found in two girders that span 80 ft across Fremont Street.
The Transbay Joint Powers Authority expects the repair of the two cracked girders in San Francisco's Salesforce Transit Center to begin next month and spill over into next year.