More than a dozen buildings surrounding a high-rise construction project in downtown San Francisco had to be evacuated this week, when concerns about the stability of a crane and 2-ton concrete slab surfaced.
Authorities said formwork at the construction site of the 37-story, 403-unit luxury residential building was secured, evacuation orders lifted and nearby streets were reopened around 9 p.m. Wednesday (Feb. 16), local reports relate.
No injuries or damage were reported.
The developer and fire officials described the events leading to the evacuation of 16 buildings.
Authorities reportedly received a 911 call around 2:45 p.m. Wednesday (Feb. 15) afternoon, regarding the crane boom at the center of the top level.
“An incident occurred at the 33 Tehama site between 35 and 36 where an interior forming system had a partial hydraulic failure while being raised to the next level,” Mary Costello, LendLease, the project’s general contractor, told media outlets around 5 p.m.
The 33 Tehama tower, designed by Arquitectonica, will be located near the new Transbay Transit Center site in downtown San Francisco.
“The interior forming system and the concrete placement arm have been secured and are being evaluated by engineers to bring it back to level,” she added.
Costello also said initial reports that indicated the concrete slab was in danger of falling were false. Those reports may have been prompted by a San Francisco Fire Department tweet that read, in part, “concrete slab set 2k Lbs loose potential to fail AVOID AREA […]”
Fire officials said in a press briefing at 6 p.m. that city inspectors confirmed the formwork in question and crane were both secure.
The construction project began September 2015 and is being developed by Hines and Invesco Real Estate. The 33 Tehama tower, designed by Arquitectonica, is located near the new Transbay Transit Center site. Features include ground-level retail spaces, a rooftop solarium, fitness center and club room, according to the contractor.
LendLease also said the glass-clad building is designed to achieve LEED Silver certification.
The project is scheduled for completion in late 2017.