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 following is a guest post written by Laurence Banville, Esq.
Winter is here and with it comes dangerous situations that construction workers don’t have to worry about during warmer weather. Nearly everyone is aware that construction workers should dress warmly in order to prevent medical conditions like frostbite and hypothermia, but what are some of the frequently overlooked risks associated with winter weather?
When anyone sees a hard hat, they typically immediate associate it with construction. It’s the ultimate symbol of safety on the job site. We all know we should wear them, but it’s easy to get annoyed with the minor inconvenience that they cause and forget about the extreme consequences that could result if a falling object catches us when we aren’t wearing one.
OSHA gives employees many rights in the workplace and employers many responsibilities. One of those is the employee’s right to see the company’s OSHA 300 Injury and Illness Summary Log and the employer’s responsibility to post it.
When OSHA raised its citation penalty amounts for the first time since 1990 in 2016, it raised them 78% to catch up with inflation over that many years. It wasn’t just a one time increase, however, as the amended Federal Civil Penalties Inflation Adjustment Act of 1990 no longer exempts OSHA from its requirements.
With cranes being on many construction sites, it’s easy for workers to get complacent. Hundreds or thousands of construction materials can be lifted by cranes throughout the project, but all it takes is one time for a disaster to occur.
Getting your communications right is critical on any construction site. For effective planning and coordination, for efficient management of different teams and for health and safety, having a reliable means of keeping everyone in touch at all times is essential.
The Bureau of Labor Statistics (BLS) recently released the National Census of Fatal Occupational Injuries in 2016. Among all industries, fatal work injuries rose 7% in 2016 (5,190 deaths) over 2015 (4,836 deaths). The fatal injury rate per 100,000 full-time equivalent (FTE) workers also rose from 3.4 to 3.6 year over year.
If you have not submitted your company’s OSHA Form 300A electronically through OSHA’s Injury Tracking Application (ITA) yet, you only have a few days left to do so.
The blowing snow of winter does not bring the construction industry to a halt. If you work in the winter, follow these tips to stay safe and warm.