D.C. Metro’s $2.8-billion Silver Line extension, already beset with months of construction delays, is now grappling with more than 400 defective concrete rail ties.
Walsh Construction and Fluor were selected as the design-build joint venture contractor for the first phase of the Chicago Transit Authority’s Red and Purple Modernization program.
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.
Tridify, a software technology firm developing automation products for AEC, announced on Dec. 11 a partnership with the virtual reality platform vendor Unity Technologies to leverage a new cloud service, Tridify Convert, that lets developers rapidly import BIM and 3D CAD files into Unity with its Industry Foundation Class-formatted BIM data intact.