The building owner has provided no access to the roof none is required per building code and no fall protection on the roof.
Roof access ladder requirements.
Side rails of through or side step fixed ladders must extend 42 inches 1 1 m above the top level or landing platform served by the ladder.
Here s an osha booklet on stairs and ladders.
The requirement for a cage comes when you have a fixed ladder longer than 20 feet.
That s where ladder cages come in.
For parapet ladders the access level is.
This is a code requirement to aid the ladder user in climbing the ladder.
Here are the basics of the requirements.
Roof access roof return exterior roof.
Note the bottom of the cage must be between 7 feet and 8 feet above the point of access to the bottom of the ladder.
The regulations say that if a fixed ladder is taller than 20 feet you are required to have a cage which meets all the requirements of 29 cfr 1910 27 d.
Parapet ladders must have an access level at the roof if the parapet is cut to permit passage through it.
Also note the flaring dimensions of the enclosure at the lower end of the cage.
In this case the architect would not provide anything.
Then the roofing contractor needs to provide safe working for the roofing workers.
The side rails of through or sidestep ladders extend at least 42 inches 1 1 m above the top of the access level or landing platform served by the ladder.