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On Jan. 10, the Transbay Joint Powers Authority announced that procurement has begun for the repair of the two fractured bottom flanges of the twin parallel girders that span 80 ft across Fremont Street in the 4.5-block-long Salesforce Transit Center in San Francisco.

Envisioning a 93-ft-tall precast concrete wind chime for the Flight 93 National Memorial near Shanksville, Pa., architects Paul and Milena Murdoch couldn’t imitate the more familiar approach featuring a single external chime striker surrounded by chimes.

A project with the name “5th and Union” blends in with the 89 other shoring and drilling jobs on John Matyasovszky’s chronological list of work since 2005—when the Malcolm Drilling Co. senior superintendent began as a laborer.

While “fulfillment centers” and other e-commerce logistic facilities drive a hot market for the manufacturing sector, traditional construction methods such as tilt-up concrete panels are being pushed to ever-greater heights.

The underlying causes of the trouble at San Francisco’s 4.5-block-long Salesforce Transit Center are coming into focus.

The steel fabricator for the third-floor tapered, built-up plate girders at the troubled Salesforce Transit Center in San Francisco is calling for a girder-hanger connection design review as part of the probe into the causes of brittle fractures in bottom flanges of twin 80-ft-long members that bridge Fremont Street.