Well ,there’s lot of ways to do this depending what you are wanting. If there are tubes (not square sections) involved.
Then i would use components and just copy them up and reduce the amount of side to reduce the geometry. Tube frame.skp (200.7 KB)
Notice the real world structure is a linear array of modular building components.
There’s very little to draw because the same parts are repeated over and over.
Keywords… Component, Copy and Array
See these video tutorials then open the attached model file. Components — SketchUp Video Copy and Array— SketchUp Video