Column cracks, rainwater leaks, substandard beams and skewed braces were among problems found along about one-third of Mexico City's elevated 7.5-mile Number 12 subway line during visual inspections by the College of Civil Engineers of Mexico. The report comes after a section of the line collapsed last month, killing 26 people. The collapsed section was not part of the visual inspection.
SmartTake: This is a parallel invesigation to the one we shared yesterday from DNV, which noted structural failure as the cause of the collapse is only a hypothesis right now. One thing worth noting though is that the College of Engineers has recommended studying samples of concrete or the welding of the steel, a point also raised by DNV.
Florida has joined 25 other states granting freedom from liability for engineers, architects and structural specialists joining volunteer efforts in response to natural disasters. Collapsed structures after a disaster pose hazards that require specialist assessment to keep first responders safe, and the bill is designed to encourage this cooperation without the worry of possible lawsuits.
Hundreds of miles of old stormwater pipes running beneath Boston continue to perform their duties, but are not ready for climate change, experts say. History reveals the system is older than the city itself, and officials are now considering ways to make it resilient against a more challenging future.
SmartTake: This fun piece details Boston's sewers, beginning in the 17th century, as part of National Public Radio's Boston Under Water series. Some great old photos are included.
Mabey Hire aims to inspire kids in the UK to consider careers in civil engineering as the field looks to a new generation of talent, writes Tony O'Donnell, the firm's engineering director. For three years, Mabey Hire has held 16-week education programs that explain the field through a variety of formats.
A study examines the performance of fiber optic sensors embedded in concrete to gauge factors such as temperature, cracking and strain. A particular advantage is the ability of the sensors to provide continuous data on expansion that would otherwise be unavailable.
Metal is now used for 3D printing injection molds and fixtures that accelerate the design process for traditional manufacturing methods like injection molding, casting, and lay-up. These are printed directly by binding metal dust and firing it to become a hard part. Which metals are being used for 3D printing?
|All of the above|
A consistent framework for infrastructure across hazards, systems and sectors is provided in the newly published ASCE manual of practice. The goal is more resilient communities through a fresh focus on consistency, says editor Bilal Ayyub, as MOP 144 applies probabilistic methods to risk analysis and project management.
Early findings in DNV's investigation into the deadly metro rail collapse in Mexico City last month suggest that deficiencies in building materials and construction processes contributed to the event. DNV has noted issues with welding, bolts and concrete.
WSP USA is urging repairs to the northernmost pier of Cincinnati's Purple People Bridge and a thorough inspection of entire deck before reopening. The pedestrian bridge was closed last month after rocks from Pier 1 fell into the Ohio River.
Floating landings designed by McLaren Engineering are accommodating new ferry service in New York City to ease commutes and provide more transportation equity. The landing system, which features a prefabricated steel barge, tall steel piles and an aluminum gangway, is resilient against climate change and can remain in operation when other transit systems are hobbled or shut down.
SmartTake: It's rare to find a project that simultaneously addresses resilience, equity and congestion. With infrastructure stakeholders demanding projects that meet an increasingly broad set of goals, NYC's floating ferry landings could be a template for future innovation.
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