Germany - Planning services in the construction industry

Description

New construction of integrated comprehensive school (IGS) and elementary school (GS) for Bierstadt-Nord, Wiesbaden, specialist planning services - technical equipment ALG 1+2+3+8 / LPH 1-9
1. key data / figures:site area: approx. 36,000 m²new building IGS and GS: GFA approx. 12,000 m²new building 3-field sports hall: GFA approx. 2,222 m²2. Initial situation: The state capital Wiesbaden (LHW) has been commissioned in the update of the school development plan to build a new school location for a 4-unit integrated comprehensive school (IGS) and a 2-unit elementary school in connection with the new development area 'Wiesbaden-Bierstadt Nord' on a joint school campus. A 3-field sports hall completes the school ensemble. WiBau is to plan, build and manage this on behalf of LHW.As the school is a new foundation, the pedagogical concept was developed by a steering group of the state education authority, school administrators and teachers from various Wiesbaden IGS as well as the school authority. Following the current pedagogical guideline, the students are to be taught in learning houses.The school building, made of a modular wooden construction, connects two schools under one roof and interweaves with the landscape with a ribbon-like structure. The individual learning houses of the schools are easily recognizable.Instead of high-tech, a low-tech architecture is aimed at through an intelligent floor plan design with cross-ventilation possibilities in combination with inner courtyards, green facades, skylights and shading elements.The sports hall forms the northern end of the school campus.3. task definition:Construction methodTimber construction is intended as the construction method for the new school and sports hall building. The ecological advantages of the CO2-neutral building material should fully meet the requirements of a sustainable building concept. The upper floors of the central school building are to be designed as a 2-story timber frame building with timber-concrete composite ceilings as a modular timber construction.The entire building is structured in both directions over a grid of 1.25 m in order to be suitable for an element-based and prefabricated construction method. The first floor level is to be constructed in conventional reinforced concrete in order to accommodate the wide spans of the structure dictated by its use.In the 3-field sports hall, a load-bearing truss structure over a span of approximately 28 m is to form the roof supporting structure.Cradle to CradleWith the modular timber structure, in addition to the energy proposals, the ecological objectives are to be implemented. Cradle to Cradle (C2C) offers further objectives for the planned education center that go beyond this. C2C stands for an eco-effective, sustainable economic principle in which biological and technical cycles are intertwined. Numerous supplementary proposals for sustainability, energy-optimized construction and a healthy indoor climate (natural raw materials, greenwalls, climate ceilings) are to characterize the design and are to be reflected in the building services concept.Energy and building services conceptThe energy requirements for heat, light and air are to be met from regenerative sources with a balanced CO2 balance. PV elements are to be installed on the roof surface, which can generate an annual energy of around 700,000 kW/a with a peak output of around 700 kW/h. The requirement for a zero-energy concept is reflected in the building's technical design. The floor plan and the chosen design of the cross-ventilation of the classrooms (in combination with inner courtyards, skylights, shading elements and green facades) should enable a technical and ventilation concept that meets the "low-tech" concept. Each room, with the exception of a few subordinate areas, is connected to two window surfaces to ensure cross-ventilation. Automated natural window gap ventilation shall be provided for the learning areas. Two to three skylight windows with automatic tilt opening shall be provided for each educational room and per forum. Depending on the outside temperature, inside temperature, CO2 content and pressure difference, these windows should be tilted just enough to meet the comfort criteria. The known CO2 limits (1,000ppm) must be ensured. In addition, there should be two room-high normal ventilation sashes per educational room - also across the corner if possible - so that shock ventilation is possible during breaks.Acoustically effective overflow openings (acoustic slots) should enable ventilation through the forum.All energy systems and the control of the ventilation should be linked together by a central control system. Basically, a simple user-friendly technology without multiple dependencies should be established. In addition, the heating load is to be covered by a building component activation system as basic heating in conjunction with a geothermal system. In winter, heat is extracted from the ground by means of a heat pump via a collector laid over a large area under the floor slab and supplied to the building via pipe coils laid in the concrete. In summer, water extracts the heat from the building and returns it directly to the floor as passive cooling.The hot water for the sinks is to be provided decentrally electrically in order to avoid a widely ramified hot water network and the associated hygienic problems, as well as distribution losses.In addition to component activation, slim radiators are to suffice for room temperature control and to cover the heat demand after shock ventilation in the case of heating. Floor zones and connecting structures are to be provided with natural ventilation via the facade.Green roof surfaces provide for targeted retention of precipitation runoff, which is to be fed into a storage pond.Rainwater utilization for irrigation of the outdoor facilities, facade greening and toilet flushing is planned.Green walls inside and climate-controlled ceilings are to ensure a healthy indoor climate.The building and numerous furnishings are to be demountable; the materials, some of which already come from recycling processes, are to be able to be returned to the raw materials cycle at a later date.3.1 General information:Sustainability and climate neutrality:In the summer of 2019, the state capital declared a climate emergency and in future will place all decisions made by the city and its companies under the climate protection proviso. This means that all climate-relevant plans, projects and processes are to be identified, evaluated in terms of their climate impact and examined with a view to their contribution to achieving climate protection goals. In the process, more climate-friendly alternatives must be developed and weighed up. This results in necessities and requirements in the implementation of future construction projects.These include, for example Climate adaptation through green roofs and facades,- As little sealing of surfaces as possible,- Rain recovery via cisterns,- Considering the issue of "gray energy" in questions of possible demolition work,- Self-sufficiency through the use of intelligent energy systems / renewable energies,- Use of natural materials to protect health,- Environmental compatibility through avoidance of hazardous waste and striving for genuine recyclingTargets for a new building should be:- Plus energy balance (produce more energy than consume)Goals for a refurbishment should be:- Climate neutrality (depending on site conditions)4. Subject of the service to be commissioned:Specialist planning services Technical equipment of plant groups 1, 2, 3 and 8, in accordance with HOAI 2013, version 2021, Part 4, Section 2, §§ 53-56, service phases 1-9.The basic services of service phases 1 - 9 are remunerated on the basis of HOAI 2013, version 2021.Undercutting the minimum rates or exceeding the maximum rates is permissible. These are to be made by percentage indication and explained in the cover letter if required.It is planned to award the execution works according to individual trades.5Call-off of services / options:There shall be a call-off of services (options) in stages, subject to the resolutions of the committees for the further implementation of the project and the decision of the Client in the further course of the project:Stage I: LPH 1-3, Stage II: LPH 4, Stage III: LPH 5-6, Stage IV: LPH 8-9The Contractor shall have no claim to the call-off of individual and/or all stages and may not derive any further claims (e.g. for damages or fee increase) from a non-call-off.6Allowable costs:Allowable costs ALG 1 = 737,029.- netallowable costs ALG 2 = 884,435.- netallowable costs ALG 3 = 1,621,463.- netallowable costs ALG 8 = 287,441.- net7. Schedule of planning services:Start of planning LPH 1: January 2023Completion LPH 3: October 2023Building permit phase: 1st half of 2024Start of LPH 5: May 2024Commencement of construction: early 2025Completion, occupancy: mid-2027

Opportunity closing date

30 September 2022

Value of contract

to be confirmed