Home / Topic Membership 2 Articles How can I join the team? How can I communicate with other members? Using the Site 3 Articles How can I add a building? Changes to the Site How can I upload photos? Definitions 1 Article When is a building a skyscraper? Drawings 1 Article How can I design a building drawing? Learning 5 Articles Why are skyscrapers important? What makes the Burj Khalifa skyscraper so special? What’s the story of the One World Trade Center in New York City? What is a lead architect doing? How long is a high-rise building typically constructed?