Window frames are usually made of aluminum.
The top horizontal element of a window frame is the head. The bottom horizontal element of the window frame is the sill.
Generally if its metal then its steel.
Aluminium.
Cannondale metal bikes are most likely aluminium frames.
Moisture can lead to wraping and twisting of timber.Maintanace may be required (depending on hardwood/softwood)compared to PVC and metal frames
The metal doors, sash, frames, molding, and trim industry is an extremely competitive industry with a low profit margin.
You can purchase wood window frames online with ease. All you have to do is type wood window frames online and find the website that suits the customer.
They are made of compounds not elements unless they are Iron or Aluminum window frames. Most window frames were made of wood but UPVC is becoming more popular.
Window frames used to be made from steel but aluminium is lighter and does not rust.
Steel tube makes the best frames
metal.
Window frames for homes should not be made of steel because of the danger of lightning strikes. This is one of the reasons why window frames are made of either wood or aluminum. Steel also has the potential to rust if not treated properly.