Large Windows require specific care. They are big and heavy. They weight more then few people can lift. In some cases Installation crew has to disassemble window on to smaller window segments to be able to lift this window.
New windows were design to have all part operable. Meaning that all operable parts could be dismounted from window frame during installation
However, in the picture below you can see another large window that we Installed in Richmond Hill last Year. This window has all fixed segments. Except for two lower windows, they are casements.
This window was carried and lifted by 6 people, 4 from outside and 2 from inside.
Removing casements to easy window installation was not the option, window can break when flipping it from horizontal to vertical position.