The contracting authority invites tenderers to an open tender contest for a framework agreement for contractor services - municipal engineering installations for Trondheim municipality. Trondheim municipality intends to enter into parallel framework agreements with 3-4 tenderers for reduced site measures for water, sewage, sanitation and roads.  It may also be necessary to use the framework agreement for work within urban areas and green areas, but the Contracting Authority is not obliged to use the contract within this area. The site measures can vary and can be pure projects within water and sewage facilities, roads, sanitation or urban areas and green areas, or they can constitute combined projects where several disciplines are included. The extent of the site measures in the framework agreement can include, but is not limited to the following areas: Water and sewage installations: New installations, renovations, renewals, separation projects as well as other relevant improvement works. Road measures: Development of roads, pavements, cycle paths, the establishment of bicycle parking, bus stops, noise reduction screens, lighting of public spaces, as well as the construction of retaining walls and similar constructions. Sanitation measures: Minor alteration works, repairs and necessary improvements connected to the existing sanitation plant and infrastructure. Urban areas and green areas: Replacement of polluted matter, vegetation work and reconditioning/establishing quarters, tracks and edges. The framework agreement will cover site measures of varying complexity and size, primarily categorised as smaller to medium sized projects. Most of the assignments will be located within Trondheim municipality.