Friday, 24 November, 2017

20000-pound crane threatening to fall from San Francisco building prompts evacuations

A strut supporting a platform in the elevator shaft broke on the 35th floor of the under-construction skyscraper causing a 30-ton machine used for transferring liquid concrete to lean into the concrete 2,000-pound slab as it was resting on the pla 20000-pound crane threatening to fall from San Francisco building prompts evacuations
Stacy Diaz | 17 February, 2017, 01:12

A full evacuation of streets and buildings surrounding 41 Tehama Street - Howard Street between First and Second Street, Tehama at First Street, the Interstate 80 Exit ramp at Fremont Street, and Folsom at First Street - remained in place Wednesday night and will persist for at least another three hours and possibly longer, said Assistant Fire Chief Tom Siragusa in a press briefing. That lean meant that a 30-ton concrete pump that sat on the platform began pushing on a concrete slab.

Baxter says city building inspectors made that determination Wednesday evening after checking the concrete slab on the 35th floor of a luxury apartment building in San Francisco's South of Market neighborhood.

Officials have warned people to avoid the area near the building.

If the slab topples over it could damage at least two building below.

San Francisco Fire Department PIO Jonathan Baxter updated the situation at 4:00 p.m. and said the unoccupied building suffered a wall failure on the top floor as the wall was being constructed.

'The worst-case scenario is we're going to have some structural damage to one or more buildings below, ' Baxter said at the time of the incident. After it was complete, officials inspected it and deemed it safe.

He added that 'the building itself is not compromised in any way, shape or form'.

The project at 41 Tehama St.is a 37-story, 403-unit luxury residential tower near the Transbay Transit Center site.

Construction began in 2015, according to a 2015 statement from general contractor Lend Lease.

The developers purchased the property back in 2014 for an estimated $48.5million, according to the San Francisco Business Times.

The Chronicle reports that the California Division of Occupational Safety and Health is investigating the incident, wherein the malfunctioning hydraulic strut supporting a platform broke and sent that platform leaning dangerously at a 15-degree angle. There were no known injuries.