The best would be to replace the whole frame with an aluminium frame, may be expensive but the frame will most probably outlive the building!!!!
With a welder, fabrication and some Patience.
remove the trim that holds the window in, on the side of window frame there should be a plate, behind this is the counter weight,
There should be a stop bolted onto the inside door frame. Look to see if it has broken or come loose.
that's not good and very unsafe. get a new frame or tray welding braces to it.( thick metal)
sill
First of all you will need Butylthane and window calking that is not water based. You need to put Butyl on the bottom of the opening where the window will go and then calk the window on the lip that will be against the structure. Then, put the window in the opening and center the bottom and put one or two screws on the bottom. then have someone hold the window while you put the slider of the window in and then just pry the frame to make the opening of the slider and the frame look even on top and bottom and then put a screw in the top middle. You will need to close the window so that you can only see an eighth of an inch and then move the middle to make it look good and there you go, you have installed a window.
The top horizontal element of a window frame is the head. The bottom horizontal element of the window frame is the sill.
form_title=Awning Repair form_header=8553 Please identify the location of the awning or patio cover installed. (Choose all that apply)*= [] Window(s) [] Door(s) [] Porch [] Patio [] Deck [] Other What has to be taken care of?*= [] Add or repair motor [] Add or repair remote control [] Add protective hood [] Add screening [] Add sun or wind sensor [] Add wind sensor [] Attach frame to house or window [] Repair frame [] Repair lateral arm [] Replace fabric [] Replace frame [] Other
try a quality super glue, or perhaps gorilla glue. Caulking would work.
Cut and weld a splice from a donor frame or fabricate a piece to weld in.
A auto body repair shop with a frame machine can repair the frame.
A casement window is one with a frame attached to the building the window revel and inside teh frame is a secondary frame which has a hinge on the side to open the window in or out. Some are double which means to windows one hinged on the left frame the otehr on the righ frame the these open indelendantly of each other but come together when closed in the middle to stop access and draft. A sash window is one the slides up and down with a counter-weight in teh frame to hold the open window where you require it.