Skylines

In the second part of a series looking at codes in L.A. that require tall buildings to have flat roofs for helicopter landing, Curbed LA discusses a new building that has been exempted from the code and whether more are likely to follow.

All buildings in Los Angeles taller than 75 feet are required to have a flat surface on the roof where helicopters can land, according to a fire department-mandated code. Now leaders are thinking about updating that code -- and the city's skyline.

Cities across the world are rising higher and beefing up their skylines with high-profile skyscrapers. A building boom in emerging global cities has put a new face on the battle for the best skyline.