Being inside a building during an earthquake is, at best, a little unsettling, but it’s extremely difficult to measure the movement of an entire building. Last year, researchers at MIT were able to use slow motion cameras to visualize how much a tower crane moved during normal conditions, which gave insight into the stress a crane undergoes. Measuring the effects of an earthquake is a little trickier, so the US Geological Survey (USGS) had to get a little creative to capture it.
USGS’ National Strong Motion Program is dedicated to recording the effects earthquakes have on our structures. They currently have sensors loaded in more than 660 ground sites and more than 180 buildings, bridges, dams, and other structural arrays. Most sites, for obvious reasons, are located in the Western US. Each building contains anywhere from 3 sensors (Desert Center, CA’s Hinds Pumping Plant) to 72 (Rincon Hill Tower in San Francisco and UCLA’s Factor Building in Los Angeles).
The Frontier Building is the subject of the video below. Built in 1982, the 219 feet (67m) tall building is the home to many State of Alaska offices in Anchorage. On January 24, 2016, the building was rocked by a 7.1 magnitude earthquake. Thanks to the USGS’ 36 sensors located in and around the building, we are able to see exactly how a building sways, twists, and shakes during a catastrophic event like this. To help visualize the event, the motions have been magnified by 300x their actual movement, so it looks a little more dramatic than it actually was. This research does, however, give designers key insight to real world conditions which could prove or disprove their calculations.
Video below was uploaded to Youtube by USGS.
The lockout/tagout (LOTO) procedure has been one of the critical elements of electrical safety training on construction sites for a decade. Generally, it’s pretty simple: if you need to work on an energized circuit or piece of equipment, shut down the breaker, put a lock on it so no one can turn it back on, and place a tag on it with your information. OSHA is considering updating the standard now and is currently requesting information from interested parties.
As the United States just recently suffered another tragic and deadly construction incident involving civilians after a crane collapsed in Seattle over the weekend, we’re reminded that the bridge collapse on FIU’s campus in Miami in early 2018 still has many unanswered questions.
For the past 3 years, Seattle, Washington has had the most construction cranes out of any United States city. But, as we know, from various videos and news stories, a crane collapse can have absolutely devastating consequences. On Saturday, a crane collapsed in downtown Seattle onto an open road below, killing two construction workers, 2 pedestrians, and injuring several others in the process.
All trench collapse deaths are preventable. As soon as everyone on a job site starts believing that we might actually make some progress. In just the past 10 days, there have been 4 trench collapse deaths across 3 separate incidents, further highlighting how far we still need to go.
Falls on the jobsite is the leading cause of injuries and fatalities in construction. Keeping up with housekeeping on your site is a great way to reduce risks of falls, but other protections, like rebar caps should be installed when rebar is exposed. A young construction worker recently found out the hard way what happens when rebar is left exposed.
On April 3, a congressional appropriations hearing was held to discuss the U.S. Department of Labor’s Federal funding for fiscal year 2020. During the hearing, the secretary of Labor, R. Alexander Acosta, told the committee how OSHA plans to spend their budget and how the agency fared in the previous year.
Safety training in the construction industry is necessary to build worker awareness – not to mention that it’s legally required – but it can be extremely time consuming and expensive to have completed. There are many companies out there looking to make money off of keeping workers safe, which is why it’s great when a company offers training free of charge, like Procore’s Safety Qualified program.
Cranes collapsing on-site are serious business, especially since many of them resulted in the loss of life. A recent crane collapse on a construction site in Alpharetta, GA was caught on camera after it caught fire, but luckily no one was injured.