The Mexico City Metro is a rapid transit system that serves the metropolitan area of Mexico City, including some municipalities in the State of Mexico. Operated by the Sistema de Transporte Colectivo (STC), it is the second largest metro system in North America after the New York City Subway.
Pantitlán metro station is a Mexico City Metro transfer station in the boroughs of Iztacalco and Venustiano Carranza, in Mexico City. It is a combined underground, at-grade, and elevated station with six island platforms and two side platforms, served by Lines 1, 5, 9, and A. The only quadra-line interchange station in the system, Pantitlán metro station works as the terminal station of all of the lines and is located followed by Zaragoza (Line 1), Hangares (Line 5), Puebla (Line 9), and Agrícola Oriental (Line A) stations. It serves the colonias (neighborhoods) of Ampliación Adolfo López Mateos, Aviación Civil, and Pantitlán; it receives its name from the last one. The station's pictogram features the silhouettes of two flagpoles.
Falsework consists of temporary structures used in construction to support a permanent structure until its construction is sufficiently advanced to support itself. For arches, this is specifically called centering. Falsework includes temporary support structures for formwork used to mold concrete in the construction of buildings, bridges, and elevated roadways.
Formwork is molds into which concrete or similar materials are either precast or cast-in-place. In the context of concrete construction, the falsework supports the shuttering molds. In specialty applications formwork may be permanently incorporated into the final structure, adding insulation or helping reinforce the finished structure.
PERI is a manufacturer and supplier of formwork and scaffolding systems founded in 1969 in Weißenhorn, Germany.
Since 2008, there was only one functioning railroad in Panama, a number that increased to two in 2014 with the opening of the Panama Metro. The first one was the Panama Canal Railway, operated by the Panama Canal Railway Company, successor of Panama Railway, which provides passenger and freight service between Panama City and Colón. In 2014, Panama Metro started operation. Historically, there were also narrow gauge railroads in Chiriquí Province, which were abandoned in the late 20th century.
Misterios metro station is a Mexico City Metro station within the limits of Cuauhtémoc and Gustavo A. Madero, in Mexico City. It is an underground station with two side platforms, served by Line 5, between La Raza and Valle Gómez stations. Misterios station serves the colonias (neighborhoods) of Peralvillo and Vallejo.
Doctores metro station is a station of the Mexico City Metro in Cuauhtémoc, Mexico City. It is an underground station with two side platforms, served by Line 8, between Salto del Agua and Obrera stations. It serves the colonias (neighborhoods) of Doctores and Obrera, and its name is on account of its proximity to the first one, whose streets are primarily named after physicians; the pictogram depicts a couple of them. Doctores metro station opened on 20 July 1994 with service northward toward Garibaldi and southeastward toward Constitución de 1917 stations. In 2019, the station had an average daily ridership of 12,334 passengers, making it the 138th busiest station in the network and the twelfth busiest of the line.
SYSTRA is a multinational engineering and consulting group in the mobility sector, whose fields of activity include rail and public transport. SYSTRA employs about 10,300 people worldwide, and is a limited company which shareholders include French national railway company SNCF, RATP, and various banks.
The Bogotá Metro is a rapid transit project under construction in Bogotá, Colombia, it is projected to be in operation in 2028. Construction started in October 2020.
The Harsco Infrastructure Deutschland GmbH, with its headquarters located in Ratingen, Germany, is a subsidiary of the Harsco Corporation. The company develops, rents and sells formwork and scaffolding products for the main construction trade and civil engineering projects.
The Puerto Rico Department of Natural and Environmental Resources (PRDNER) is the executive department of the government of Puerto Rico tasked with protecting, conserving, developing, and managing the natural and environmental resources in Puerto Rico. As of April 2022 the current interim Secretary is Anaí Rodríguez after the resignation of Rafael A. Machargo. As of November 2020 the department has 1,096 employees.
The Panama Metro is a rapid transit system in Panama City, Panama. It links neighborhoods north and the east of the metropolitan area to the city center.
Line 12, also known as the Golden Line from its color on the system map, is a rapid transit line of the Mexico City Metro network. It travels 25.1 kilometers (15.6 mi) along the boroughs of Benito Juárez, Iztapalapa and Tláhuac in southwestern, central-southern and southeastern Mexico City, serving twenty stations. The line was inaugurated on 30 October 2012, going from Tláhuac to Mixcoac station. In 2016, work to expand it to Observatorio station started. All the stations are accessible to people with disabilities as they have elevators, tactile pavings and braille signage plates.
The Trade Unions International of Building, Wood, Building Materials and Industries, also known as the Trade Unions International of Construction, Wood, Building Materials and Industries, or by its French acronym UITBB is a Trade Union International affiliated with the World Federation of Trade Unions.
ULMA Architectural Solutions is a cooperative in the construction sector that creates prefabricated products for drainage and architecture. In the field of architecture it offers: ventilated facades, industrialized enclosures, customized prefabricated products and urban furniture. It is one of the 9 cooperative companies that make up ULMA, one of the largest business groups in northern Spain.
The ULMA Group is a business group, made up of nine cooperatives. It group currently has a presence in 81 countries and is one of the largest business groups in northern Spain.
A waffle slab or two-way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. The name waffle comes from the grid pattern created by the reinforcing ribs. Waffle slabs are preferred for spans greater than 40 feet (12 m), as they are much stronger than flat slabs, flat slabs with drop panels, two-way slabs, one-way slabs, and one-way joist slabs.
On 3 May 2021, at 22:22 CDT (UTC−5), a girder overpass in the borough of Tláhuac carrying Line 12 of the Mexico City Metro collapsed beneath a passing train. The overpass and the last two cars of the train fell onto Tláhuac Avenue near Olivos station, killing 26 people and injuring 98 others. It was the Metro's deadliest accident in almost fifty years.
