Building a cat house by myself #27 - Window construction! Does it take 4 people to lift the glass?!

Although I am building a house by myself, I left the window work to a professional construction team. It was a choice I had to make because I couldn't lift the heavy glass by myself. However, there was also a good thing about the site being crowded with people for the first time in a long time. Window type is a T/T-oriented German style window.
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