3.1 miles of bridge does not equal 3.1 miles of on grade highway. In fact, it’s not even close. In order to build the new New York Bridge, which is replacing the existing Tappan Zee bridge that crosses the Hudson River, 14 miles of main span cables, 50 miles of foundation pilings, 300 thousand cubic yards of concrete, and 220 million pounds of steel are needed to complete the structure. Oh, it’s also going to take another 2 years to build, on top of the 3 they’ve already been working on it.
The existing Tappan Zee Bridge was built in 1955 and handles around 138,000 vehicles per day. After realizing that, it’s even more amazing that no cars were hit when a crane, which was working on the new bridge adjacent to the existing, collapsed onto the existing bridge back in July. Without the added danger of nearby construction, the Tappan Zee was already a hazard by itself. According to the New NY Bridge’s website, that stretch of road was the scene of an average of twice as many accidents as the rest of the NY Thruway system, which is a collection of highways. It has narrow lanes and no emergency shoulders, which can be a recipe for disaster.
The new bridge will contain 8 wider lanes for safer and quicker traffic, not including the emergency lanes, and has also been designed to handle a future commuter rail. Pedestrians and bicyclists will also have their own lane to cross the river safely. In total, the bridge will cost almost $4 billion dollars (3.98 to be exact) and will finish sometime in 2018. We’re sure the NY drivers can’t wait until it’s complete.
Many companies were involved in the design and construction of this bridge, which together are known as the Tappan Zee Constructors, LLC. Companies in the group include Flour, American Bridge, Granite, Taylor Bros, HDR, Buckland & Taylor, URS, and GZA.
The video below was shared by the New NY Bridge on Youtube:
Concrete is an extremely strong building material, but has a notoriously weak tensile strength. In order to resist tension, bending, and shear forces, steel rebar or other reinforcement materials are added either prior to the placement or into the mix. Even with reinforcement, concrete is still extremely rigid and prone to cracking. In the event of a major earthquake, the uneven and horizontal forces can cause structures to crack and, in the worst case, cause failure.
Construction Safety is talked about constantly. There are many construction companies that take it very seriously. There are also many that don’t. All will say it’s their top priority.
So what can a city do that’s facing regular worker deaths and increases in workplace injuries? New York City has decided to require extensive safety training for all of the 185,000 construction workers in the city.
[sponsored] With the hottest of the summer months behind us, we are moving into the cooler months of autumn on the jobsite. While Helly Hansen is frequently seen on snowy slopes and high seas, their tradition of quality and protection actually originated in premium workwear.
Modular building makes a lot of sense: build repetitive structures in a controlled, factory-like setting and transport to the project site and assemble. It should be a more efficient and less expensive way to construct a building, but the truth is, it’s a lot harder than it looks. There’s also no written standard for doing it.
Masonry workers, specifically brick and block masons, have been around for centuries and are one of the construction industries oldest professions. Before blocks were prefabricated and purchased, masons had to cut the material by hand before placing. Recently, robotic brick and block placing robots have threatened to take some jobs away from human masons, but that technology is still a long way away from making a huge impact on the profession
Concrete can adapt to any shape its formwork calls for while it’s being placed. While it’s POSSIBLE to make intricate designs with the material, it’s not always easy or practical to do so. Researchers from ETH Zurich have designed a new method of forming and placing an ultra-thin, curved concrete roof system that they plan on installing on a construction project next year.
According to the Workzonesafety.com, nearly half (46%) of all work zone-associated worker fatalities from 2003-2010 were caused by being struck by a vehicle. Surprisingly, only around 2% of those workers were killed by a drunk driver. From 2003 to 2015 (the last year this data was updated), a total of 1324 work zone fatalities have been recorded, which averages to about 102 per year.
Residents living near a Jersey City, New Jersey construction site were frightened as they watched “explosions” of smoke coming out of holes in the ground.
For almost 80 years, the Old Kosciuszko Bridge connected Brooklyn and Queens in New York. Much like many other bridges its age, it is being replaced due to capacity issues and deterioration. When it was completed in 1939, it was built for 10,000 cars per day. Unfortunately for the people who needed to use that bridge that past few decades, around 180,000 cars used it.
The immense technological growth the construction industry has seen in the past decade has been a refreshing change, to say the least. Fax machines, large filing cabinets, and redundant work are slowly becoming a thing of the past. More importantly, software developers are actually paying attention to the construction industry, making our lives collectively easier, while giving us more data to make better decisions. Bluebeam, maker of one of the industry’s favorite construction document software, has recently announced a wireless digital sensor specifically for under construction buildings.