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CITY OF MEXICO
Specialists in structures and construction have indicated that the collapse of the flight in an area of the Artz Pedregal shopping center was due to a lack of supervision and omissions
Carlos Ceja Tejada, master of metallic and mixed structures and director of labor in Mexico City, told Excelsior that the collapse of the flow was due to a combination of overload conditions, fatigue of the structural elements and vibrations of the environment.
I'm talking about the vibrations of the environment, I want to talk about the impact of the main road on the one that flew, that is to say at high speed. The second level and the heavy traffic on the ground floor. These two vibrations caused the resonance of the aircraft, which, in combination with the overloads it suffered as a result of the saturation of the rain, caused fatigue of the structural elements. "
Commenting on the materials that should be used" It is important to consider for these landscaped areas, good drains with filters, mainly sand, gravel, tezontle, in combination with a small vegetal layer to maintain the plant part that they install. "
they considered the saturation of the soil and vegetation they were going to place, it is a factor that almost doubles the weight, they do not take into account the weight of water and saturated extract.
This leaves us the experience that all green roofs need to be revised, including the saturation of the stratum where the top layer needs to be placed
For his part, the president of the Mexican Chamber of the Construction Industry in Mexico City, Arturo Bautista, pointed out that the collapse was due to a lack of supervision.
I consider that it is a problem supervision, rather than conceive, "said the engineer. "It's a fact that it's a structural failure," he said.
A good design takes into account absolutely everything, the earth, the moisture; that the trees will grow and that over time they will weigh more, "said Arturo Bautista and pointed out that the channel deviation of the Magdalena River had nothing to do with the accident.
In an interview with Imagen Informativa with Pascal Beltrán del Río, Fausto Lugo, Chief of the Civil Protection of the capital, reiterated that the structural break is related to the gardening work done on the roof of
He made it clear that "it is not yet possible to say whether there was an overweight or not, because what is examined is whether the calculations have taken this weight into account or not. Another element that is being evaluated is the materials, to see if the strength of the materials has been designed to support that weight. "
After concluding a meeting with stakeholders, companies and authorities, Lugo stressed that Civil Protection is working with mitigation measures to restore mobility in the region.
He said that since last night the work began for the retirement of the fallen people and that the work will last about two hours, so the side of the Periferico will be closed.
Afternoon, the architect Sordo Madaleno and his team have conducted a review with the personnel of the Civil Protection
Previously, in a press release, Grupo Riobóo said that his participation in the structural design and calculations of the shopping center "only concerned the concrete structures or which compose the building "; He added that the collapsed part" is a metal structure that was not part of the structural design and structural processes "of the group and specified that no his companies is dedicated to the realization of works and / or construction.
PGJ asks for more expert opinion
The Office of the Attorney General (PGJ) has sought the opinion of the Institute of Constructions to strengthen the realization of expertise to reliably determine the causes of the collapse of part of the structure Artz Pedregal
In addition, the PGJ performs coordinated work with the Secretariat of Civil Protection to remove rubble and open the lanes of the area to traffic as soon as possible.
The Public Ministry analyzes the documentation sent by the In addition, the local Attorney General's office asked the Institute of Administrative Audit and the Agency for Environmental and Land Planning to provide him with information on the procedure of construction of the property, in order to have all the necessary elements for: the continuation of the investigations.
Sources close to the survey The investigation revealed that it has not yet been determined whether the overweight caused the collapse or was the result of any accident. poor planning or negligence on the part of the builders.
The terrace that collapsed was on the last level of the building and had a perimeter.
The damage occurred in the north-east structure of the building, which includes the B facade and the corridor called cantiliver.
-Filiberto Cruz
Mancera accuses the delegation
The former head of government, Miguel Ángel Mancera, assured that the authorities of the delegation Álvaro Obregón have authorized the construction of Artz Pedregal.
In an interview for Image of the Night with Ciro Gómez Leyva, Mancera Espinosa assured that the process of work over the government of the delegation must do so and not the government of the city
It seems to me that all the companies that took part in this task were serious companies. The information that I have, it is that he has complied with all the requirements set by the rules, "said the former president of the capital.
Finally, Mancera Espinosa asked "to examine the documents and in case of finding a trick" "
-of the Drafting Committee
In service, 2 restaurants
In the area s collapsed in the Plaza Artz Pedregal operated two restaurants: Frutos Prohibidos and House Kayser.
In addition, companies like Japonez, Casa del Pastor and Innova Sport have conditioned their premises to start offering their services.
According to the testimonies of employees of the various businesses of the mall, the third floor of the collapsed area was designed for establishments upstairs, the third floor was pure food, "said Víctor Cuéllar, chef of the restaurant El Bajío, adding that other companies such as Sonora Grill already had Spanish food. He rented to settle.
He said that the area that collapsed was a green area that had six long planters, which were about 50 meters long and 50 centimeters tall.
There was also grass on the floor and After reminding how they heard an explosion and a few minutes later the security elements of the place asked them to evacuate, Víctor Cuéllar has applauded the safety work of the place: [19659004CistorecognizethesafetyissuethattheyhaveparticipatedinthatafterfulfillingthisrequirementwaspassedimmediatelyafterwardsstartedtoevacuatethecitiesItwasacknowledgedthattheyhadavoidedmorethanonetragedythatcouldbeproducedhere"
He recalled that about 62 people were at the site. restaurant, half were diners and the other employees. He noted that in total there were 300 or 400 people who could leave 25 minutes before the flight collapsed.
Construction workers and employees of various companies went yesterday to the place, guarded by elements of the capital police, in the security members of the square have indicated that it is not necessary. There would be no work until further notice.
Some expected to know the results of the meeting that they had, from 8 am to 4:30 pm, the administrators of the place and the project leaders, to receive guidance.
Others, stayed in place to find out if they could go through their belongings that they left during the evacuation.
The masons tried to go through the tools that they had also left behind. Tello
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