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.
Scissor lifts are on most typical construction job sites and they’re an often overlooked hazard. Too often, liberties are taken with the lifts that create unsafe conditions, which can cause injuries and deaths. OSHA recently released the results of their investigation of 10 fatalities and 20 injuries involving scissor lifts and released their findings in what the organization refers to as a “Hazard Alert.”
If you’re into heights, then China may be the place you need to be. The country recently unveiled the world’s highest and longest glass bridge and, as scary as many tourists may find that, it was way more dangerous while it was under construction. New footage of another construction site in the Laowang Monutains is giving that bridge a run for it’s money.
Since Construction Junkie was conceived in 2015, we’ve seen a lot of construction equipment flip for some really stupid reasons. Like this crane, this other crane, and this third crane dropping a bulldozer. Those are just some of the ones caught on video and they should be enough to convince you not to go out of your way to do dangerous things with a crane.
A portion of the Skagit River Bridge, located in Mount Vernon, Washington catastrophically collapsed into the water below after a semi hauling an oversized load clipped a cross beam in 2013. Luckily and amazingly, no one was killed by the incident, but 3 people were taken to the hospital for minor injuries as several cars fell into the river. It took over 3 years to determine a cause and the report states that there were several causes. First, below is security camera footage of the collapse, uploaded to Youtube by newschannel500, in which you can see just how quickly the collapse happened.
Cranes are a staple of many construction sites throughout the world, but they’re susceptible to damage caused by sudden bursts of high wind. Winds were blamed for the collapse of the New York City crane collapse that killed one man and injured 3 others in 2016 and again for the devastating crane collapse in Mecca, which killed over 100.
Much like the stories above, a crane collapsed last week in Dubai, UAE, after sudden heavy winds burst through town.
Tragedy struck a Florida construction company last week after 3 construction workers passed away while working underground below a newly paved road. Another volunteer firefighter is in critical condition, and possibly in a coma according to WSVN Miami, after entering the manhole trying to save the victims.
No matter how fun demolitions and demolition videos might be, there’s an inherent danger to performing them that cannot be overlooked. Just last year, a different parking garage collapsed during a demolition in Houston, Texas, which landed on one of the excavators performing the work. Thankfully, no one was injured in that collapse, but it could have been much worse.
The following is a guest post written by David B. Lever.
When construction sites are safer, then productivity increases as well as profits. More construction safety means less time lost due to accidents, lower insurance premiums, and less money spent repairing damaged equipment.
Jobsite pressures, such as time crunches and monetary issues can quickly tempt otherwise good people into making some pretty poor decisions. There are also others who use their construction business as a front for other illegal activities. Many people were arrested for a variety of reasons in 2016 and the list below should serve as both a reminder and a warning for those considering making bad decisions.