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UPDATE: Buildings evacuated near construction site emergency in SoMa

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Notice of a possible collapse of a 2,000 pound slab of concrete from the 30th floor of 33 Tehama Street prompted immediate evacuations of ten buildings in San Francisco’s South of Market district Wednesday, February 15, 2017. (Jessica Christian/S.F. Examiner)

Threats of a 2,000 concrete slab falling from an as-yet completed 35-floor-building in downtown San Francisco on Wednesday forced the evacuation of more than 10 buildings.

Crews remained on top of the building late Wednesday afternoon after the evacuation in attempts to shore up the wall and prevent anything from toppling from the rooftop.

VIDEO: SF fire official describes crane fail at construction site

By 6 p.m. fire officials said the crane and slab had been made secure and there was no further worry of any public safety, according to several media reports.

San Francisco Fire Department spokesperson Jonathan Baxter told reporters at the scene that a crane moving the concrete slab somewhere near the top of the building failed, and construction crews called in the emergency.

This is “not a building collapse” kind of scenario, Baxter said.

Construction crews called the San Francisco Fire Department at around 2:44 p.m. when issues arose with the wall-like slab and a small crane atop the building at 33 Tehama St.

Soon after, the surrounding areas were closed off and buildings were evacuated in case the slab and the crane attached to it fell. A wide swath of buildings around the site were evacuated but not one was injured in the incident.

A statement from the building’s developer Wednesday afternoon gave more details about the incident and appeared to contradict early reports of a slab possible falling.

“This afternoon, an incident occurred at the 33 Tehama site between levels 35 and 36 where an interior forming system had a partial hydraulic failure while being raised to the next level. The interior forming system and the concrete placement arm have been secured and are being evaluated by engineers to bring it back to level,” reads a statement from Hines, the developer.

The company added that the small crane or boom at issue was not the same at the yellow crane that can been seen from the street. They also said there was no danger of a 2,000 pound slab falling to the street.

Lendlease is the general contractor.

Evacuations were ordered in the area of a high-rise construction site in San Francisco's South of Market neighborhood where a massive concrete slab was loose and threatening to fall. (Jonah Owen Lamb/S.F. Examiner)

Evacuations were ordered in the area of a
high-rise construction site in San Francisco’s South of Market neighborhood
where a massive concrete slab was loose and threatening to fall. (Jonah Owen Lamb/S.F. Examiner)

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