Road collapse near ancient bridge gives Florence that old sinking feeling. B hire an engineer to correct the design and bill the original engineer for the job, What if the proposed event does not look safe These plans contained instructions for the placement of the antenna hoisting lugs, which provided attachment points for the lifting cables that would be used to remove the antenna sections from the delivery truck and to hoist the antenna into the air for the final assembly. A. see previous. 0:51. On Saturday at the station of K1EEE in Deerfield NH while taking down Mike’s tower for an upcoming sale of house and move, both K1EEE and K1JGA were severely injured when the tower collapsed (no details as yet). Missouri City (AP) -- An 1,800 foot tall television tower toppled as workers were lifting an antenna onto its pinnacle Tuesday, hurling five men to their deaths. Five … It was the second tallest structure ever built, being surpassed as the tallest by the Burj Khalifa tower in the United Arab Emirates, completed in 2009. Total collapse during installation of 6-ton FM antenna on new 1800 ft. tower. They were worried, but not worried enough to consult with a professional. Riggers had a responsibility to procure an appropriately skilled engineer for the redesign. Once lifted into position, Riggers proposed to reinstall the baskets after the section was in place. If the engineers required that the antennas not be disturbed in the final piece then they were responsible for designing the change in erection procedures. Radio masts and towers are typically tall structures designed to support antennas for telecommunications and broadcasting, including television.There are two main types: guyed and self-supporting structures. : This would seem to create 50% liability to the Antenna Engineering Firm. I generally argue that if the design firm makes the correction, the correction goes through the design firm’s QA/QC process and then it comes back to me for review and implementation. It was an incredible loss of life for a wonderful bunch of riggers who I knew personally and the ultimate demise of Worldwide. Then a main cable broke in early November, leading the National Science Foundation to declare just weeks later that it planned to close the radio telescope because the damage was too great. The Arecibo Observatory, made famous as the backdrop for a pivotal scene in the James Bond film "GoldenEye" and other Hollywood hits, had been shuttered since August after an auxiliary cable snapped and caused a 100-foot gash on the reflector dish. 7915 Cypress Creek Parkway, Suite 130, Houston, TX 77070. WOAK radio is off the air for FM listeners, due to a construction accident that resulted in the station’s radio tower to collapse. The mast was in the final stages of construction. Senior Road Tower collapse near Houston in 1982. “I heard something snap,” he said later. To do less is irresponsible. It was the strong winds that left the top half of the station’s 100-foot radio tower dangling. The shed was fully engulfed in flames and the heat from the fire compromised the base of the tower, causing it to collapse. University … While your description of the failure may be somewhat valid I recall the ultimate cause of the failure was a shackle connected to the load line and antenna. A smaller local firm, Riggers, Inc., was contracted to raise and assemble the antenna. April 19, 2018 / 2:01 PM / CBS News FORDLAND, Mo. I believe my responsibility does not end when I do my part right. The main collecting dish at Arecibo Observatory is among the world’s largest single-dish radio telescopes. PEimpact – Recognizing the Impact of PEs A broadcasting tower in the Dutch town of Hoogersmilde has collapsed. As Andy recorded the raising of the last section of the tower, the supporting bolts suddenly failed, and the entire section fell, cascading a thousand feet to the ground. A few weeks before the incident, Riggers approached Antenna Engineering and asked if it was possible to remove the microwave baskets on the top 100-foot section of the tower so they could lift the antenna into position. I would think that if you design equipment that cannot actually be installed, that your responsibility should include selling a structure that must have engineering instructions on how to install. California Privacy/Information We Collect. Their mistake was failing to refuse to work until a viable rigging scheme was submitted. © 2020 CBS Interactive Inc. All Rights Reserved. They used bolts that they believed were of the proper strength, but they did not realize that the piece of steel they attached also added a large weight, which was spread through the U-bolts. The antenna section should have been designed for proper rigging possibly removing the the microwave baskets to reduce load and facilitate the lift. ©2019-2020 PEimpact.com - All rights reserved. Search for "radio tower" in these categories. Without seeing contracts, the riggers were responsible for means and methods and were not prevented from hiring an engineer to check their rigging approach. ", Amigos es con profundo pesar comunicarles que acaba de colapsar la plataforma del Observatorio de Arecibo. This example is a good reinforcement to push to have design errors corrected by the design firm and vetted through the entire process to avoid unilateral field changes that could lead to unintended consequences. Try these curated collections . On December 7, 1982, engineer Andy Hurdack was recording the installation of a new 1800-foot tower that would serve the airwaves of the surrounding areas of Missouri, Texas. The antenna was designed and manufactured by Antenna Engineering, Inc., a moderately-sized local firm. Since engineers are usually not adept at communication, it would be a good thing for the State Boards to provide a compendium of what if’s e.g. As Andy Before its collapse, the observatory withstood hurricanes and earthquakes, and played central roles in movies like "GoldenEye" and "Contact. The giant radio dish, nestled in a karst sinkhole amid lush hills near Arecibo, Puerto Rico, saw plenty of fame in its time. A ham radio enthusiast who took care of Manchester's public school grounds for 20 years was killed over the weekend when a radio tower he and a friend were dismantling collapsed. Masts are often named after the broadcasting organizations that originally built them or currently use them. It was the first to detect indirect evidence for gravitational waves, the first to map Venus's surface, and the first to detect exoplanets. The second-largest radio telescope in the world collapsed on Tuesday morning. To help construct the tower, the crew used a vertically-climbing crane mounted on the already-constructed portion of the tower to lift each new section. The riggers had every opportunity to weigh in on the constructability of the antenna during the design thereof, were experienced, approved them in principle. If I correct the design error in the field, I take on the design, QA/QC, review, and implementation roles all at once. The Warsaw Radio Mast was a telecommunications tower located near the town of Gąbin, central Poland, and the world's tallest structure at 646.38 metres (2,120.7 ft) from 1974 until its collapse on 8 August 1991. Browse more videos. A ham radio enthusiast who took care of Manchester's public school grounds for 20 years was killed over the weekend when a radio tower he and a friend were dismantling collapsed… The tower engineer should have approved the rigging designed or required that the riggers had the design reviewed and approved by a PE. Instead, after consulting with the firm, the engineer decided that by saying anything to Riggers, Antenna Engineering would assume liability in the case of an accident. The 300-foot AM radio tower is located in a wetland next to a popular biking and jogging trail, which creates unique challenges for workers. Further, when the issue was brought to the attention of Antenna Eng’g’s chief Engineer, he had a responsibility to stand with Riggers to identify a safe solution. Senior Road tower group was a consortium of 9 FM stations serving the Houston area and had no connection to a television station. Crews: tower collapse rare. In addition to these mistakes, the investigation found malfeasance: the u-bolts used by the rigging crew for the lug extensions, which were the actual point of failure in the accident, were rated by their manufacturer for twice the load they could actually withstand. Why they disavowed that responsibility rather than insisting on it is beyond me. Completed in 1963, the Arecibo Observatory was the largest single-dish radio telescope in the world until China's Five-hundred-meter Aperture Spherical Telescope, or FAST, began operations in … Riggers then requested the help of the chief engineer at Antenna Engineering to review their plans on lifting the antenna without removing the microwave baskets. The bolts would have failed regardless, so no liability should go there, although an audit of their products should ensue. The tower legs were 8-inch diameter solid steel bars; each tower section weighed approximately 10,000 pounds. The Arecibo Observatory's 900-ton platform, which sent and received radio waves and was suspended 450 feet (140 metres) in the air, crashed into the 1,000-foot-wide (300-metre-wide) disk below. On the way down, the falling section sheered away guy wires and caused the entire structure to topple. On October 12, 1996, a 1462 feet high antenna tower at Cedar Hill, Texas (about 20 miles south of Dallas, TX), owned by Lin Television collapsed killing three employees of Doty-Moore Tower Services who were raising a gin pole near the top of the tower to replace an existing antenna with a new antenna. MORGAN MCFALL-JOHNSEN & AYLIN WOODWARD, BUSINESS INSIDER 3 DECEMBER 2020 The second-largest radio telescope in the world collapsed on Tuesday morning. Without Antenna’s consult, Riggers proceeded with their plan. Bulldozer operator sent running when water tower collapses near his vehicle. On the other hand, because of their stringent requirement to lift the antenna section with the microwave baskets attached, the Antenna Engineering Company should have been available to review the Riggers plans, I believe they have some responsibility on the catastrophe and of course, the u-bolt manufacturer share responsibility for misrepresenting the u-bolts rating. They could have used a helicopter for instance, a means not regulated by the manufacturer whose responsibility was to the structural integrity after the antenna was erected. Four tower riggers were on the tower. To complete the construction, the crew would then use this crane to help mount the two-section antenna onto the top of the tower. It was the second tallest structure ever built, being surpassed as the tallest by the Burj Khalifa tower in the United Arab Emirates, completed in 2009. The antenna was also “picked” by Worldwide utilizing ginpole which was secured and cantilevered to the top sections of the tower after being “jumped” there. FDA authorizes Pfizer's COVID-19 vaccine for emergency use, SCOTUS rejects Texas bid to overturn election results in 4 states, Feds to buy additional 100 million doses of Moderna vaccine, Why some Black Americans are skeptical of a COVID-19 vaccine, Biden, Harris introduce team who will "deliver immediate relief", FKA twigs sues Shia LaBeouf over alleged sexual assault, Mayor slams U.S. It was the second largest radio telescope in the world and had been operating for more than half a century. No injuries have been reported. In this plan, Riggers hoped that by attaching the lifting cables to the end of the added steel section, the antenna section could be raised vertically without obstruction from the microwave baskets. Antenna Engineering responded that removing the baskets would void the warranty. For the good of the project, I regularly scan other parts of the project for things that “don’t look right”. When the final antenna sections arrived, the project had gone off without incident; however, the last section of the antenna was different because it had microwave baskets attached to its sides. The Gerbrandy Tower consists of a concrete tower with a height of 100 meters on which a guyed aerial mast is mounted. A contact the engineer of record, if the engineer is not responsive Playing next. And what led to this case being one of the most widely debated ethical engineering cases to date? In my projects I am always thinking of how something can be built or serviced, how others might mess up, and how my design can mitigate or avoid mistakes by others. I believe that attaching the microwave baskets created additional bending moments that could not be resisted by the bolts’ strength. See radio tower stock video clips. “It’s a very swampy area,” said Dave Lemke from the New Hope Public Works Department. They had an obligation to the public once they were aware of the risks. A crew of riggers with years of experience in similar projects was on-site during construction. The engineer at Antenna Engineering refused to approve, or even review, the design. In my work as a Commissioning Engineer I often have to make a decision of correcting a design error in the field or pushing to have the design firm correct the error and resubmit construction drawings. So, how did these decisions lead to the accident? Monday quarterback aside, the Rigger Company should have retained a structural PE to design the lifting system and components. Engineers were developing repair plans when one of the main 3-inch-wide cables attached to the same tower unexpectedly snapped on November 6, causing the instrument platform to tilt and … "If you asked me what the least likely thing to happen was, it's the tower coming down," Fedele said. A ham radio enthusiast who took care of Manchester's public school grounds for 20 years was killed over the weekend when a radio tower he and a friend were dismantling collapsed. For 57 years, the observatory played a leading role observing deep space targets, bodies in the solar system and, using powerful lasers, the composition and behavior of Earth's upper atmosphere. An argument could be made that Antenna Engineering has some culpability here, too. I would concur with the culpability of Antenna Eng’g since they did not consider the microwave baskets in the constructability review it did with Riggers. If the tower lost another cable, the engineer of record noted, an unexpected collapse would be … It is impossible to make anything foolproof because fools are so ingenious. In the end, seven people died as a result of this tragic and inadequate design flaw. The collapse occurred around 8am local time Tuesday that scientists stunned who relied on what was once the world’s largest telescope to uncover cosmic wonders in deep space. Now-a-days a safety shut down would have been called and work would have been stopped until a revised lift plan developed. Operated by the National Science Foundation through the University of Central Florida, the iconic observatory was made up of a fixed 1,000-foot-wide dish antenna built into a bowl-like depression that reflects radio waves from space to a 900-ton instrument platform suspended 450 feet above by cables stretching from three support towers. Boston medical conference led to 300,000 COVID-19 cases, Biden facing pressure to pick Rep. Deb Haaland as Interior Secretary, Biden to nominate Tai for trade rep and McDonough for veterans affairs, Second gentleman to teach entertainment law at Georgetown, Biden introduces his pick to lead Defense Department, NAACP calls on Biden to appoint a racial equity adviser, Biden to nominate Marcia Fudge to lead HUD, Biden vows to distribute 100 million vaccine doses within first 100 days. Both cables were attached to the same support tower. -- A worker has died after a TV tower … Could people still be infectious after they're vaccinated for COVID-19? Antenna Engineering had a responsibility to see the project through to completion. So tragic, and so easily avoidable. Road collapses near Queen's Scottish Castle . 107,444 radio tower stock photos, vectors, and illustrations are available royalty-free. They attached a long channel to the antenna section with several U-bolts. Three others on the ground were injured. 180' radio tower buckled as a 125' crane lowers it. Unfortunately K1JGA did not survive his injuries and K1EEE is in very bad shape and remains in the hospital. Antenna refused to modify the design, so the Riggers should have had the insight to do the obvious – hire an engineer to make the assembly work, then charge Antenna for non-performance. What if the design does not work? Many scientists and Puerto Ricans mourned the news, with some tearing up during interviews. The collapse occurred about 10:30 A.M. on Saturday. One killed in TV tower collapse near Fordland, Missouri. I just put my gear down rather hastily and got out of the way.” Because the collapse was caught on camera, the film has provided engineers and scientists the opportunity to closely examine the event. Forgive me but I must note that this story is just about totally incorrect save the collapse of the tower. I must point out that as an electrical RF engineer I only wrote the purchase specification for the electrical characteristics of the antenna and not its structural ones. TOWER COLLAPSE HURLS 5 MEN TO THEIR DEATH. The collapse … The second-largest radio telescope in the world is no more. The event is vivid and current in my mind despite being 38 years ago and evokes an emotional response even today. The collapse was not unexpected: Following two cable breaks in August and November, experts determined that the radio telescope was so structurally unsound that it had to be decommissioned. Everyone was too trusting. 1:19. TomoNews US. 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