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Also, sounds like you're qualified to answer, is it possible to do 1m x 1.6 in one pane? One company I spoke to said no, but that might just be them being a bit shit.
Polygon-
is it possible to do 1m x 1.6 in one pane?
The size of glass wouldn't be a problem, unless you want over 2.4m
The limits for an opening sash are weight which makes sense as the hinges will be supporting it and also the width of the sash.
Side hung friction stays are generally limited to a sash 600mm wide due to the leverage of the weight and wind .
Egress hinges are more prone to get bent by a gust of wind.Wide top hung opening casements, the bottom of the frame will droop under the weight of (itself and) the glass. You can support the top edge by packing it against the glass, but you can't pull the bottom edge upwards.
1m wide is OK but if 1.6 is your width, some places may do it but it's probably not a good idea.Tilt and turn and reversible frame profiles are normally a bit deeper than casement, and can work with larger openings.
At 400mn cill height, you will have to use safety glass, as below 800mm is classed as low level.
user69121
"normal" friction stays open between 70ish degrees for 8 inch sizes down to 45ish degrees for 24" size. The sash travels towards the middle of the opening, so not great for climbing out of.
Egress hinges are side hung and allow 90deg opening across to one side.
Easy clean is a button to unlock the egress hinge so it can be slid across for cleaning.
Restricted is a button to unlock the slider beyond the initial opening
I don't think there's restricted easy clean.
https://store.northwesthardware.co.uk/windows/friction-stays/restrictor-egress-stay.html
Why have two hinge pins when you can have 16 rivets two sliders and a sprung catch!