There are reasons this code is in place.
Shower door swing code.
When planning your shower design keep in mind that building code requirement irc p 2708 1 2000 edition states that all hinged shower doors must open outwards.
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The minimum size for a separate toilet compartment is 30x60 inches.
90 degree simply means that your frameless shower door enclosure has one or more square corners.
Hinged shower doors that swing inwards only are not permitted by code.
The size for a separate toilet compartment should be at least 36x66 inches with a swing out or pocket door.
This is because shower doors often are made of materials such as glass that can easily break and pose a danger.
Ideal for openings that are too narrow to accommodate a bypass door.
Can be combined with inline fixed panels in wide alcove enclosures.
So says the building code.
Per the international residential code all glass or panels in fixed operable swinging sliding and bifold doors must be constructed from safety glass regardless of size.
All of our frameless doors swing both in and out and will self center once they pass the half way point.
Some models have hinges to allow door to swing both inward and outward.