The Torres-Amat factory-house, now an amalgam of different constructions, is located in Sallent, a small town in the Bages region, in the industrial basin of the Llobregat river. The building itself is a rectangular construction made of stone masonry, three storeys high, sitting on the remains of a water mill that acts both as a foundation and a basement. It is structured in three bays with two lines of cast-iron pillars, parallel to the longest façade. These lines of pillars are joined together by wooden beams, which support ceramic vaults. The top floor replaces the pillars with wooden horses that support the roof made of flat ceramic and Arabic tiles. The nave, as it was joined to the factory house, did not have its own staircase; therefore, as it was separated to become a library, it had no vertical communication. On the other hand, access from the street, due to the steep slope of the street, was from the lowest floor. These problems of accessibility and general mobility were the driving force behind the project. The importance of the relationship with the street given to a popular library such as the one to be installed in the building clashed head-on with the obligation to use only the first and second floors. For this reason, the entrance was modified, placing it at the highest part of the street, considerably reducing the difference in level with the first floor. This made it necessary to create a floor between the ground and first floors, where, apart from the main entrance, the cloakroom and the building's facilities could be located. This ‘mezzanine’ coincided with the bay of the nave closest to the factory house. For this reason, this bay was completely remodelled to locate the accesses, the lift, the staircase, as well as the services and offices, creating an entrance area that allowed the building to be recognised in its full dimension, visually bringing the floors closer to the street, making both the wooden structures of the roof and the general functioning of the building present from the outset. As the building's programme assigned the first floor to reading and consultation, and the second to archives, the staircase was divided into two distinct parts. Up to the first floor, with a single wide, gently sloping flight, and up to the first floor in two narrow, sloping flights that folded in on themselves.