Generally:
The entire residential complex comprises 3 houses, each with 3 floors above ground, and a shared underground car park and basement.
Buildings A and B are identical and each consist of 15 residential units.
House C has only 12 residential units with the same floor space, making a total of 42 residential units.
Each of the 3 houses has its own technical and house connection room in the basement.
Technical description waste water:
The wastewater in the building is fed into the sewer system in a free gradient.
Wastewater and rainwater are drained off in separate pipe systems.
Drainage objects below the backflow level are generally fed into the gravity drainage via lifting systems.
The wastewater generated in the underground car park is collected in pits and then fed into the wastewater network via mobile submersible pumps.
Pressure line connections are provided in the underground car park for this purpose.
In the 3 washrooms, submersible pumps are provided in on-site pump sumps (building construction services) with sheet metal covers (building construction services).
The basic pipes laid by the shell builder and the rain pipes installed by the roofer are not part of this tender.
Furthermore, all installations in the open spaces are part of the outdoor facility planning, which is carried out by a GALA company.
Technical data waste water:
- Drainage pipes basement / strands: approx. 950 m (sleeveless cast iron pipe - SML);
- Property connection lines on the floor: approx. 264 m (plastic pipe - PP).
Technical description drinking water:
A central hot water supply by means of 2 x fresh water modules per house is planned for the apartments with circulation. (Included in the scope of delivery for the heating system) the hot water is produced by a gas condensing boiler with the support of tube collectors that are supplied and installed by the heating system.
The interface (heating / sanitary) is the transfer connection at the fresh water station.
To avoid lime deposits in the drinking water installations, a physical water treatment system is provided for each house.
The water is distributed via the basement to the individual consumption points and risers. The pipelines are to be laid below the ceiling.
All risers are equipped with line shut-off valves. The arrangement of the valves is planned due to the accessibility in the general areas.
Pre-wall system elements are provided for the sanitary cores.
The installation shafts and the pre-wall elements are planned with appropriate system elements.
The planking of the installation walls takes place in the sanitary trade.
A fitting piece for the hot water and cold water metering is installed in the apartments. The delivery and installation of water meters is carried out by a billing company, which is commissioned by the client.
Technical data drinking water:
Cold water, hot water, circulation: approx. 2 800 m stainless steel system pipe, pressed, thermal insulation pipes mineral fiber shells
(aluminum laminated, PVC jacket sheet metal jacket).
The residential complex comprises 3 houses with 3 floors each and a shared underground car park and cellar rooms.
Buildings A and B are identical and each have 15 subsidized barrier-free residential units.
Building C has 12 residential units with the same floor area, resulting in a total of 42 residential units.
Each of the 3 houses has an elevator with 4 stops each and has its own connection and technical rooms for heating, water, electrical and media connections in the basement.
A chimney is installed in each of the boiler rooms for the gas condensing boilers.
A washing machine connection is made for each apartment in the washing and drying rooms provided in the basement.
All apartments have their own cellar compartment in the basement of the respective house. Bicycle storage rooms will be installed in the underground car park. The entrance to the underground car park has a 2-lane ramp with an entrance and exit. The ventilation concept of the underground car park provides for natural ventilation:
- New construction of the irrigation and drainage system within the building, including connection to the connection lines in the ground;
- The bathrooms and toilet rooms in the apartments are designed with an installation system including riser installation in dry construction;
- The rest of the sanitary installation (kitchens) is carried out as a pre-wall installation in drywall or as a surface installation in the technical rooms. The entire TB pre-wall is created by the building construction department;
- The risers are intrigued in the installation system or in the pre-wall installation. This also applies to the increase in the heating and ventilation trades;
- The hot water is prepared centrally by means of a solar-assisted gas condensing boiler (natural gas).
Due to the construction situation and use of the basement rooms, lifting systems are necessary.
The installations are brought in according to Construction progress on different dates.
As waste water in the basement is disposed of via underground pipes. The SW underground pipes are located under the base plate and are lifted above the backflow level using the respective lifting system.
Necessary applications and permits, with the exception of the drainage input, must be submitted by the contractor. The - if necessary - appointment coordination with the:
Haimhausen community:
As a disposal company, the contractor is responsible. The same applies to the coordination with the construction site and the other trades.
The connection for the wastewater disposal is made via 3 house connection shafts to the public sewer; the wastewater and rainwater disposal - which takes place outside the building - is not part of this tender.
The interface or the transfer point is located inside the building, directly behind the house connection created on site.
The wastewater from the upper floors and the ground floor is channeled into the external sewerage system via drop and collecting pipes. The wastewater from the basement is routed via collecting pipes to the on-site underground pipe - below the building - and via a lifting system into the external sewer system. The transfer point to on-site services is the building entrance, which is usually provided on-site with the external system drainage.
Floor drains or the aforementioned lifting systems are provided in the heating system and in the laundry room.
Backflow level (RSTE):
The drainage of deep-lying rooms that are below the backflow level must be fed to the collecting line via appropriate lifting systems.
For drainage via lifting systems, the backflow levels entered in the execution and drainage input plans must be observed.
Backflow stops are not installed.
Rainwater:
The roof surfaces (gable roof) are drained via gutters with external RW downpipes.
The rainwater collected in each house is drained through drainage shafts or trenches in the open spaces under the underground car park on the property. The waste and rainwater disposal - which takes place outside the building - is not part of this tender.
Roof penetrations:
All SW and RLT roof penetrations are made on site. All SW and RLT roof penetrations or RW inlets are handed over to the roof sealing company for on-site installation.
Building supply (water installation):
The necessary drinking water connections are made from the public drinking water network in the street Grundfeld.
The TW house connections for the construction project are made via the respective technical room in the basement. The necessary applications and permits are to be submitted by the contractor, if necessary. The scheduling agreement with:
Zweckverband Freising Süd:
As a supply company and coordination with the construction site and the other trades is to be provided by the contractor.
The supply pressure in the local water network is on average 5.5 bar. The buildings are operated with the supply pressure from the public network.
The description includes the entire water supply up to the house connection room. The entire water supply is carried out according to the regulations of DIN 1988 or the supplementary DVGW guidelines.
All water-carrying pipes (from where they enter the house) are adequately insulated from diffusion-proof material to prevent condensation from forming, and the fastening points must also meet these requirements.
All lines, fittings, fixtures, barriers, gate valves and the like are to be marked with labels.
Drinking water consumption:
To calculate the maximum water requirement, the number of sanitary objects (from the architect's plans) and the resulting calculation of the peak flow according to DIN 1988 were used.
Consumption recording:
The drinking water is measured centrally via a water meter with a calibration certificate. The meter system is designed according to the requirements of:
Special purpose association Freising Süd installed.
Water treatment:
After the cold water inlet, a backwash filter and pressure reducer are installed in the drinking water line.
Physical water softening is provided to avoid the loss of lime.
Sanitary objects:
Equipping with sanitary objects according to the following description of services. Garden water:
The construction project receives according to Execution plan:
- 4 garden water connections in house 4 (one per apartment on the ground floor) and
- 2 garden water connections per house A and B from the drinking water network.
Water distribution:
In principle, the water is distributed from the house connection room via the basement under the ceiling to the individual areas and via installation shafts or ceiling openings to the individual floors.
The three houses are operated independently.
Hot water supply:
The hot water is supplied centrally. Heat transfer via plate heat exchanger on the heating side with downstream buffer storage Heat generator: Solar system (50 sqm / house with the support of gas condensing boiler (natural gas)
Pipe materials:
- Water supply: basement distribution and shaft installation up to apartment barrier:
Stainless steel pipe, press system;
- Water supply: connection line from the apartment barrier to the outlet: stainless steel pipe, press system;
- Sewer connections and sewerage:
Sleeveless cast iron pipes (SML);
- Wastewater disposal in the basement and shaft installation sleeveless cast iron pipes (SML);
- Wastewater connection lines on the floor:
Plastic sewer pipes with push-in sleeves (PP pipes);
- Existing connection lines for other materials (e.g. SML, stoneware, KG, PE-HD or PE-S2) must be equipped with appropriate transitions.
Thermal insulation:
Insulation work must be carried out in accordance with DIN 18421, DIN 1988 and the EnEV. The individual areas are insulated as follows:
1. Distributors and fittings in the heating center and necessary stairwells in accordance with EnEV.
Insulation material: mineral fiber or closed-cell insulation Surface: sheet metal jacket,
2. Visible lines (WW-ZW) according to EnEV.
Insulation material: mineral wool or closed-cell insulation Surface: with mineral wool: PVC jacket,
3. Visible lines (KW) with 100% insulation thickness, diffusion-tight. Insulation material: mineral wool or closed-cell insulation Surface: with mineral wool: PVC jacket,
4. Riser pipes (WW-ZW) and all non-visible pipes
(WW-ZW) in false ceilings and slots according to EnEV.
Insulation material: mineral wool or closed-cell insulation Surface: with mineral wool: pure aluminum,
5. Risers (KW), as well as all invisible lines (KW) in false ceilings and slots with 100%, diffusion-tight.
Insulation material: mineral wool or closed-cell insulation Surface: with mineral wool: pure aluminum,
6. Sanitary connections (KW-WW-ZW) in the floor area according to EnEV,
7. Sewage pipes on the last floor (vent pipe) must be protected against condensation.
Insulation material: mineral wool or closed-cell insulation Surface: with mineral wool: pure aluminum,
8. Wastewater pipes in suspended ceilings in common areas must be protected against noise and condensation.
Insulation material: sound insulation mat,
9. Rainwater pipes in the building are to be protected against sound and condensation water.
Composite pipe or insulation material: mineral wool or closed-cell insulation Surface: with mineral wool: pure aluminum,
10. Hot and circulation pipes must not have any weaknesses in their thermal insulation,
11. In areas at risk of frost with standing water in hot or cold water pipes, additional thermal insulation is required,
12. Cable routing in areas that come into contact with the outside air (underground car park) must be provided with 200% thermal insulation in accordance with EnEV to be provided.