[arminius]

My installer's put in windows in my basement, and left these metal flange type things along the top. What am I to do with these (cut them off, screw in, etc) before I finish?

 

[oh'mike]

Call the installers---some basement windows are escape windows --these have metal clips , rather like the one in the picture, which is used to quickly remove the window during an emergency.

Ask them if that is an escape window--and what the clip is for.

 

[arminius]

Call the installers---some basement windows are escape windows --these have metal clips , rather like the one in the picture, which is used to quickly remove the window during an emergency.

Ask them if that is an escape window--and what the clip is for.

Unfortunately the window installers are long gone. It's an Andersen Renewal crank-out window purchased from Home Depot. I was hoping for a simple response on best practice.

 

[Windows on Wash]

Looks like a mounting strap. Just cut it off and trim out the window.

 

[SeniorSitizen]

Look for a faint series number possibly etched in the glass in a lower corner and contact Andersen help line @ 1-888-888-7020 for a simple response on best practice.

 

[paul100]

Unfortunately the window installers are long gone. It's an Andersen Renewal crank-out window purchased from Home Depot. I was hoping for a simple response on best practice.

Are you sure they are Anderson renewal. I don't think Home depot sells them.

 

[Ron6519]

Unfortunately the window installers are long gone. It's an Andersen Renewal crank-out window purchased from Home Depot. I was hoping for a simple response on best practice.

It looks like a slider, not a casement window. There's a large window well outside, making it look like an egress window. If the exterior is brick or stone, that might be a metal clip for installation.
"Simple responses and best practice", rarely answer a question. It's more of an obfuscation.