RIEDENBURG QUARTER

We’ll always find a way. Or two.


Sometimes unforeseen challenges can pop up in projects. In those moments, it’s critical to find quick and effective solutions.



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Construction is underway for 316 new apartments on the site of the former Riedenburg barracks to meet a wide range of living needs for individuals, families, single parents and seniors.
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New residential quarter for all kinds of needs

As part of a project started in 2018, 22 new apartment buildings with 316 homes are being built in Salzburg on the site of the former Riedenburg barracks to meet a wide range of living needs for individuals, families, single parents and seniors. Previously closed off by a high wall, the 35,000 sqm grounds are now accessible on foot or by bike from all directions. A 5,000 sqm park with play areas will make the Quarter an attractive place for the general public, along with a new kindergarten, several commercial spaces for doctors' practices, start-ups and other businesses and a daytime café offering catering. The first apartments have already been handed over to tenants.



Modern mobility concept

The mobility concept provides for over 300 underground parking spaces in a garage with multiple entrances and exits. Another 20 parking spaces will be available above ground for deliveries and visitors, plus some 830 bicycle racks and two electric car parking spaces with charging stations.



Drainage issues with underground parking

The underground parking garage proved to be one of the biggest challenges in the project. According to the original planning, outlets were to be fitted at certain points to drain the weather-exposed surfaces. But as the parking garage is beneath the surface, this would have required openings at several points in the garage ceiling.

BG-Graspointner support technician Markus Unterberger explains:

Ceiling openings would have meant major work, while at the same time causing structural weakness. Having point outlets thus wasn’t an option.


Solutions sought and found

Unterberger came up with alternative solutions in close cooperation with Albert Eberdorfer, General Manager of Geologie-Wasser-Umwelt GmbH, who explained one of the main problems with the project:

The underground parking garage means that in some areas there is effectively no gradient. The run-off heights are also very low because the profile of the underground garage and the ground surface slope in opposite directions.

We did the hydraulic calculations for the jointly devised solutions, and decided to use wider channels in some places to get the necessary hydraulic capacity. Some of the adjacent surface areas were also directly connected to the main channels. Special constructions were necessary at two spots, one of which was the playground area. There was not enough gradient there, so especially deep channels were used. A concrete wedge was cemented into these to create an artificial slope. Our FILCOTEN® HPC channel material proved to be ideal for this, as it bonds very securely with concrete wedges thanks to its mineral material properties. This ensured that the construction height was sufficient. All drainage water flows through outlet lines into underground seepage systems. Dirty water from the subterranean garage and parking lot areas is discharged via the sewer system.

Eberdorfer was satisfied with the results and enthused about the environmental benefits of BG drainage systems, as he believes sustainability should always be taken into consideration whenever possible.


Waste disposal issues should really already be addressed from the very start of a project. There are clear advantages to using 100% recyclable materials.


BG-Graspointner Sales Consultant Gottfried Graspointner labelled the entire project a success, attributing the fruitful cooperation to a number of factors:


The challenges were finding the optimal solution in terms of both technology and cost and delivering it on time. We are very pleased with the outcome, and at having yet another opportunity to be there as problem solver for architects, planners and builders.


Need a solution for a technically demanding project? We would be glad to assist you! Call our sustainable drainage specialists at 0043 6233 89 00 0 or e-mail us at This email address is being protected from spambots. You need JavaScript enabled to view it..



Stay tuned for part two:

Part two is devoted to taking a close look at the interesting concept for the outdoor elements of the Riedenburg Quarter. Exclusively on our blog.



Project profile


Project name: Riedenburg Quarter

Location: Salzburg

Installed channel types: FCT pro G NW 150 // FCT pro V NW 100 // FCT pro V NW 100 mini H = 80 // FCT pro V NW 150 mini H = 170, H = 120, H = 100 // FCT pro V NW 200 // FCT pro V NW 200 mini H = 200 // BG TE terrace slot channel E, SW18, closed, variable BH80-130 // BG-FA facade channel V RB 130, fixed element height 55, two-sided perforation // BG-FA facade channel V RB 200, fixed element height 55, two-sided perforation // BG-FA facade channel V RB 250, fixed element height 55, two-sided perforation // BG-FA facade channel V RB 250, fixed element height 90, two-sided perforation

Total length in meters: 1.558 m

BG-support services:H ydraulic calculations, special designs for artificial slopes in very deep channels

Client/builder: GSWB Salzburg

BG-project team members: Gottfried Graspointner, Markus Unterberger

BG-business partners: Würth Hochenburger GmbH in Salzburg

Architects/planners: DI Albert Eberdorfer (Geology Water Environment GmbH) // DI Mag. Otmar Stöckl (landscape architect) Schwarzenbacher // Struber Architekten ZT GmbH // Fally & Partner Architekten ZT GmbH

Building contractor: Generalunternehmer RHZ Salzburg // Garten-Landschaftsbau GmbH





Gottfried Graspointner
Sales advisor north Austria
BG-Graspointner GmbH
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