Reconstruction and extension of the town hall in Olfen - Technical equipment
As part of a VGV procedure, a structural planning competition was launched with a subsequent negotiation procedure in order to find suitable architects for carrying out this building task, which is very important for Olfen in terms of content, as well as urban planning and architecture. DBCO GmbH, Münster was commissioned.
The city of Olfen intends to upgrade the historic town hall energetically and to expand it in a contemporary way. The building, which was built in the 19th century, has been selectively extended, renovated and rebuilt, but it is currently unable to meet the requirements for a modern administrative headquarters either qualitatively or quantitatively.
A funding application has been submitted as part of the urban development programme “Small Towns and Municipalities”. Based on a feasibility study for renovation and design planning by the architects commissioned, the declared goal is to find a uniform and coordinated, high-quality solution that takes into account the different demands placed on the various parts of the building, the requirements of the users of the town hall implemented in the best possible and architecturally high quality and supports the attractiveness of the adjacent Kirchstraße.
In an overall architectural concept, a modern urban town hall extension is to be designed, which offers the option of adapting variably to future and changing challenges.
The start of construction is planned for 2022.
The cost estimate for the KG 400 is 1,710,342 million (gross). The cost estimate for the new building is 400 962,131 euros for the old building and 400 748,211 euros for the old building The present procedure refers to the allocation of planned services for technical equipment plant groups 1 to 8 in accordance with section 55 HOAI and is aimed at engineers or consulting engineers. It is planned to assign performance phases 1 to 3 in part and 4 to 9 (technical equipment according to § 55 HOAI) in stages.
The main aspects are design planning in floor plans, cost calculations and explanations. Not all schemes have been created for all fixed asset groups. There is no planning for the new elevator system.
After the first grant application was submitted, changes were made to the design, for example in the area of stairwells and the attic. It will be necessary to make adjustments to the design planning (ceiling mirrors, etc.) and review of the design principles. The main requirements result from the draft planning report:
” Key requirements for technical building equipment result from user requirements for comfort. Slope ceilings made of clay panels with integrated heating and cooling are provided in all office areas, which provide great comfort in both cooling and heating conditions. The office areas are illuminated flexibly by floor lamps, so that rigid electrification of the ceiling areas can essentially be dispensed with in coordination with the heating system. Heat is generated via a combined heat and power plant in the basement of the new building.” The design and planning of the CHP plant is carried out via a subsidiary of the city of Olfen.
” Office areas are electrified via built-in furniture arranged on the façade side, which serves as an intermediate archive and additional storage space. As a result, the exact positioning of workstations along the façade remains flexible. The lighting is also flexible via floor lamps, so that electrification of the ceiling areas within the offices is not necessary. All workplaces are equipped with external aluminium blinds, which minimise the consumption of electrical energy by directing daylight in the upper third in combination with daylight-dependent and individually controllable single-site lighting. The arrangement of central access within the floors makes it possible to keep the actual office areas free from installations in the ceiling area, so that comparatively high ceiling heights can be implemented here. Media is accessed per building within a central shaft, from which the respective floors are accessed via a collective path for all trades in the building length. In order to achieve the greatest possible flexibility of workplaces on the one hand and to minimize this, media access is carried out entirely in the slope ceilings of the flexible middle zone. All rooms that have mechanical ventilation requirements are also located in this zone. These are supplied by a central ventilation system, which is placed in the basement of the old building. The existing elevator shaft of the dismantled elevator in the old building offers an economical option for vertical development for this purpose.” The technical implementation in the respective plant groups is described in the reports of the offices concerned in advance.
The service for structural engineering is awarded in a separate procedure. However, a close coordination process of specialist planning is required for planning with each other.