Abstract: A fixed service ladder that has: a body attachable to a building; rungs attachable to the body as ladder steps; and side rails. The fixed service ladder has a use configuration, in which the fixed service ladder is in its use configuration, and for implementing a climbing hindrance, a retracted configuration, in which the rungs are turned closer to each other and to an angle differing from horizontal. The body has for each rung a first joint to which the rung joins allowing vertical pivoting; and for at least two different rungs restraints restraining said rungs in the use configuration. The rungs have second joints for pivotable joining with the side rails outside the body.