Workers are seen on scaffoldings at a construction site of a residential compound in Beijing, China October 19, 2020. REUTERS/Tingshu Wang

A worker is seen on scaffoldings at a construction site of a residential compound in Beijing, China October 19, 2020. REUTERS/Tingshu Wang

A supporter of the Pakistan Democratic Movement (PDM), an alliance of political opposition parties, sits on a scaffolding and waves a flag as he listens to their leaders during an anti-government protest rally in Karachi, Pakistan October 18, 2020. REUTERS/Akhtar Soomro

Construction workers set up scaffolding in front of shops at Wangfujing shopping street in Beijing, China October 14, 2020. REUTERS/Florence Lo

Workers are seen standing on a scaffolding guiding a crane carrying a slab of concrete on top of a building under construction, amid the coronavirus disease (COVID-19) outbreak, in Dublin, Ireland October 1, 2020. Picture taken October 1, 2020. REUTERS/Clodagh Kilcoyne

Workers are seen standing on the scaffolding of a building at a construction site, amid the coronavirus disease (COVID-19) outbreak, in Dublin, Ireland October 1, 2020. Picture taken October 1, 2020. REUTERS/Clodagh Kilcoyne

Workers are seen standing on the scaffolding of a building at a construction site, amid the coronavirus disease (COVID-19) outbreak, in Dublin, Ireland October 1, 2020. Picture taken October 1, 2020. REUTERS/Clodagh Kilcoyne

Workers erect a scaffolding above a giant poster advertising dental aligners of Swiss manufacturer bestsmile at a construction site in Zurich, Switzerland September 30, 2020. REUTERS/Arnd Wiegmann

A worker carries a scaffolding pole at the National Speed Skating Oval, known colloquially as the "Ice Ribbon", which will host the 2021 World Speed Skating Championships and the speed skating competitions at the 2022 Winter Olympics in Beijing, China, September 23, 2020. REUTERS/Thomas Peter

A worker carries a scaffolding pole at the National Speed Skating Oval, known colloquially as the "Ice Ribbon", which will host the 2021 World Speed Skating Championships and the speed skating competitions at the 2022 Winter Olympics in Beijing, China, September 23, 2020. REUTERS/Thomas Peter

A boy climbs a scaffolding at the Hansen family farm, where members of the Hillbilly Brigade, a group of some 1,200 men and women who spontaneously came together to fight fires, and firefighters from all over came to rest and eat the donations provided from the community, during their work in the aftermath of the Riverside Fire near Molalla, Oregon, U.S., September 16, 2020. Picture taken September 16, 2020. REUTERS/Shannon Stapleton

Children sit on a scaffolding at the Hansen family farm, where members of the Hillbilly Brigade, a group of some 1,200 men and women who spontaneously came together to fight fires, and firefighters from all over came to rest and eat the donations provided from the community, during their work in the aftermath of the Riverside Fire near Molalla, Oregon, U.S., September 16, 2020. Picture taken September 16, 2020. REUTERS/Shannon Stapleton

The logo of clothing company Camaieu is seen behind a scaffolding on a closed shop in Olomouc, Czech Republic, September 8, 2020. Picture taken September 8, 2020. REUTERS/David W Cerny

The logo of clothing company Camaieu is seen behind a scaffolding on a closed shop in Olomouc, Czech Republic, September 8, 2020. Picture taken September 8, 2020. REUTERS/David W Cerny

A man sits on a scaffolding in front of a closed Camaieu clothing store in Olomouc, Czech Republic, September 8, 2020. Picture taken September 8, 2020. REUTERS/David W Cerny

A street is covered in scaffolding in the financial district during the coronavirus disease (COVID-19) pandemic in the Manhattan borough of New York City, New York, U.S., September 9, 2020. Picture taken September 9, 2020. REUTERS/Carlo Allegri

People sit outside a restaurant under a scaffolding in the financial district as the spread of the coronavirus disease (COVID-19) continues in Frankfurt, Germany, September 8, 2020. REUTERS/Kai Pfaffenbach

Volunteers carry scaffolding to be set up around a building that was damaged by an explosion at the Beirut port, in the neighbourhood of Karantina, Beirut, Lebanon, August 13, 2020. REUTERS/Alkis Konstantinidis SEARCH "KARANTINA NEIGHBOURHOOD" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A worker stands on scaffolding outside a sorority house in the Greek Row area at the University of Washington in Seattle, Washington, U.S. August 5, 2020. Picture taken August 5, 2020. REUTERS/Lindsey Wasson

A scaffolder works on a new Barratt Homes housing development near Warrington, Britain, August 6, 2020. REUTERS/Phil Noble

A scaffolder works on a new Barratt Homes housing development near Warrington, Britain, August 6, 2020. REUTERS/Phil Noble

A construction worker carries a scaffold pole on the roof of a house in London, Britain August 3, 2020. REUTERS/Kevin Coombs

A builder stands on a scaffolding as he works on a terraced house in Oldham, as the town faces local restrictions in an effort to avoid a local lockdown being forced upon the area amid the coronavirus disease (COVID-19) outbreak, Britain July 30, 2020. REUTERS/Phil Noble

A builder stands on a scaffolding as he works on a terraced house in Oldham, as the town faces local restrictions in an effort to avoid a local lockdown being forced upon the area amid the coronavirus disease (COVID-19) outbreak, Britain July 30, 2020. REUTERS/Phil Noble

A builder stands on a scaffolding as he works on a terraced house in Oldham, as the town faces local restrictions in an effort to avoid a local lockdown being forced upon the area amid the coronavirus disease (COVID-19) outbreak, Britain July 30, 2020. REUTERS/Phil Noble

A New York Police Department (NYPD) officer works at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

A New York Police Department (NYPD) officer works at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

New York Police Department (NYPD) officers work at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

A New York Police Department (NYPD) officer works at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

An emergency worker peers from a window at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

Emergency crew work at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

A woman in a face mask looks on at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly TPX IMAGES OF THE DAY

A woman peers from a window at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

Emergency crew work at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

New York Police Department (NYPD) officers work at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

A view shows Notre Dame Cathedral, as workers remove damaged scaffolding elements from the remains of the burnt roof, in Paris, France, July 14, 2020. Picture taken from the Institut du Monde Arabe. REUTERS/Charles Platiau

A view shows Notre Dame Cathedral, as workers remove damaged scaffolding elements from the remains of the burnt roof, in Paris, France, July 14, 2020. Picture taken from the Institut du Monde Arabe. REUTERS/Charles Platiau

A view shows Notre Dame Cathedral, as workers remove damaged scaffolding elements from the remains of the burnt roof, in Paris, France, July 14, 2020. Picture taken from the Institut du Monde Arabe. REUTERS/Charles Platiau

The sculpture Roman cavalier and his horse (1853) by Louis-Joseph Daumas is seen in front of the scaffoldings of the Eiffel tower in Paris, France, June 25, 2020. REUTERS/Charles Platiau

A portrait of George Floyd is taped on a scaffolding support beam surrounded by photos and messages of support for the Black Lives Matter movement near Black Lives Matter Plaza in Washington, U.S. June 24, 2020. REUTERS/Tom Brenner

People pass by a scaffolding walkway covered with printed messages and photos in support of the Black Lives Matter movement amid protests on racial inequality at Black Lives Matter Plaza near the White House in Washington, U.S. June 24, 2020. REUTERS/Tom Brenner

A worker is silhouetted on a scaffolding installed on the facade of the Centre Georges Pompidou modern art museum during a visit following the coronavirus disease (COVID-19) outbreak, in Paris, France, June 15, 2020. Picture taken June 15, 2020. REUTERS/Christian Hartmann REUTERS/Christian Hartmann TPX IMAGES OF THE DAY

Workers assemble scaffolding around the statue of Robert Clive in Whitehall, following the death of George Floyd who died in police custody in Minneapolis, London, Britain, June 12, 2020. REUTERS/Dylan Martinez

Workers assemble scaffolding around the statue of Robert Clive in Whitehall, following the death of George Floyd who died in police custody in Minneapolis, London, Britain, June 12, 2020. REUTERS/Dylan Martinez

Workers assemble scaffolding around the Equestrian Statue of Charles I at Charing Cross, following the death of George Floyd who died in police custody in Minneapolis, London, Britain, June 12, 2020. REUTERS/Dylan Martinez

Workers assemble scaffolding around the Equestrian Statue of Charles I at Charing Cross, following the death of George Floyd who died in police custody in Minneapolis, London, Britain, June 12, 2020. REUTERS/Dylan Martinez

Workers assemble scaffolding around the Equestrian Statue of Charles I at Charing Cross, following protests against the death of George Floyd who died in police custody in Minneapolis, London, Britain, June 12, 2020. REUTERS/John Sibley

Construction workers assemble a scaffold at a job site, as phase one of reopening after lockdown begins, during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., June 8, 2020. REUTERS/Brendan McDermid

Construction workers assemble a scaffold at a job site, as phase one of reopening after lockdown begins, during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., June 8, 2020. REUTERS/Brendan McDermid

Construction workers assemble a scaffold at a job site, as phase one of reopening after lockdown begins, during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., June 8, 2020. REUTERS/Brendan McDermid

Construction workers assemble a scaffold at a job site, as phase one of reopening after lockdown begins, during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., June 8, 2020. REUTERS/Brendan McDermid

A construction worker assembles a scaffold at a job site, as phase one of reopening after lockdown begins, during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., June 8, 2020. REUTERS/Brendan McDermid

A view shows Notre Dame Cathedral, as workers prepare to remove damaged scaffolding elements from the remains of the burnt roof, in Paris, France, June 8, 2020. REUTERS/Christian Hartmann

A view shows Notre Dame Cathedral, as workers prepare to remove damaged scaffolding elements from the remains of the burnt roof, in Paris, France, June 8, 2020. REUTERS/Christian Hartmann

Workers prepare to remove damaged scaffolding elements from the remains of the burnt roof of Notre Dame Cathedral in Paris, France, June 8, 2020. REUTERS/Christian Hartmann

Workers prepare to remove damaged scaffolding elements from the remains of the burnt roof of Notre Dame Cathedral in Paris, France, June 8, 2020. REUTERS/Christian Hartmann

Workers prepare to remove damaged scaffolding elements from the remains of the burnt roof of Notre Dame Cathedral in Paris, France, June 8, 2020. REUTERS/Christian Hartmann

Workers prepare to remove damaged scaffolding elements from the remains of the burnt roof of Notre Dame Cathedral in Paris, France, June 8, 2020. REUTERS/Christian Hartmann

Workers walk on a scaffolding at a construction site as public sector employees gradually return to work, two months after they were ordered to stay home as part of a tight lockdown to stem the spread of the coronavirus disease (COVID-19), in Amman, Jordan May 26, 2020. REUTERS/Muhammad Hamed

The facade of Argentina's Central Bank is seen with scaffolding, during the coronavirus disease (COVID-19) outbrake, in Buenos Aires, Argentina May 21, 2020. REUTERS/Agustin Marcarian