The HoHo Vienna and its architecture
When you look at HoHo Vienna from the outside you are reminded a little of huge wooden blocks with a facade reminiscent of tree bark. Naturalness and above all the exposed wood surfaces in the interior are part of the underlying idea of making wood in this high-rise a perceptible experience. HoHo Vienna not only looks sleek and exudes a natural charm, it also demonstrates creativeness when it comes to the use of space: the modular office format permits later individual changes that can be modified at any time without much effort. This flexible arrangement of the floor plan additionally ensures that the high-rise will never lose its allure for tenants, because it guarantees a very long life span in a friendly atmosphere. In a manner of speaking, the feel-good factor showcases itself – tangible every day for all who pass by and all who enter.
Intelligent solutions in the world's tallest timber high-rise
The concept of timber-hybrid construction for large-volume buildings was completely re-developed for the construction of HoHo Vienna in order to optimally satisfy all town planning requirements. With a height of roughly 84 metres, the special requirements in terms of structure planning, fire protection and efficient usability are particularly critical. The construction system kept deliberately simple combines systems already available on the market, thus guaranteeing an efficient, highly flexible and safe hybrid construction building that offers a remarkable degree of sustainability. Each material is used in such a manner as to ensure that the various requirements are best met. Thanks to innovative wood technology, roughly 75 percent of the building from the ground floor up will be made of wood; the service core will be constructed of solid reinforced concrete to which the timber supporting structure is secured.
The HoHo Vienna as a showcase project for hybrid construction
The simplicity of the construction system used in the making of HoHo Vienna and the manner in which it combines different construction materials make up its appeal, with wood always taking a front seat. The system, which is kept deliberately simple, stacks up four pre-fabricated, serial building elements: supports, joist, ceiling plates and facade elements. The wood composite floors are secured to the building's supporting core structures and extend out to the facade. The serial elements that make up the wood composite floor structures are supported by wooden columns in the outer facade layer. The columns, in turn, form a common mounting element with the likewise prefabricated outer wall elements made of solid wood and the "earthy" mineral sandwich shell structure that forms the building's facade. The exposed interior wood surfaces of the continuous wood floor structures, the pillars and the outer wall create a sensual, natural atmosphere.
The concept of reduction to only a few, simple structural elements and connections and using them in large numbers captures the benefits of an economy of costs. At HoHo Vienna, the calculated resistance to fire is warranted by the use of suitably dimensioned wooden elements and the building's efficient design. Cladding with other materials is therefore not necessary. Very important: by using wood in this manner, it remains an essential element of the indoor Environment.
You can't beat wood!
HoHo Vienna will be built according to the criteria of the new TQB assessment system (total quality building) developed by the Austrian Sustainable Building Council (ÖGNB). In so doing, the quality of the wooden high-rise will be documented and certified from planning to construction to use.
The sophisticated energy concept developed by HoHo Vienna encompasses energy supply measures and measures for the prevention of energy loss. They include: lifts equipped with energy recovery technology, photovoltaic systems, air/water collectors for the pool, fundament absorbers as well as a decentralised ventilation system with air-conditioning.
Open-plan office, individual module or something entirely different?
Flexibility is central to the sophisticated space allocation plan. For future tenants and their rental premises this means: easy participation in decision-making with regard to room design, not only before construction begins, but long-term variable options – anytime! Long-term flexibility and neutrality of use: the modular office format also permits later individual changes that can be modified without much effort at any time. In addition, the concept of reduction to only a few, simple structural elements and connections and using them in large numbers results in an economy of costs. Longevity is an essential factor when contemplating efficient sustainability.
Ecological Performance Indicators
The ecological performance indicators of HoHo Vienna
We are all well aware that wood has many wonderful properties. HoHo Vienna "utilises", "installs", "exploits" and "employs" wood as a material in the best manner possible.
- Roughly 3,600 m3 of wood are used in the entire construction, corresponding to 0.6 per mill of Austria's annual surplus timber production!
- Compared to reinforced concrete construction, the use of wood avoids some 2,800 tonnes of CO2 equivalents. This corresponds to approx. 20 million passenger car kilometres or 1,300 years of daily car drives over a distance of 40 kilometres.
- In addition, compared to reinforced concrete construction, the HoHo Vienna construction method saves some 300,000 megawatt hours of primary energy. This corresponds to primary energy savings of 300,000 mWh! This is approximately the amount of energy needed to heat a tenement with 32 apartments over a period of 1,100 years.
Facts & Figures
HoHo Vienna Facts & figures:
|Owner/Principal:||cetus Baudevelopment GmbH, Caroline Palfy and investor Günter Kerbler|
|Architecture and planning:||RLP Rüdiger Lainer + Partner, Univ. Prof. Rüdiger Lainer|
|Planning of support structure, building physics and building services engineering:||RWT+ZT GmbH, Richard Woschitz,
MZT Dr. Ronald Mischek ZT GmbH
|Fire protection engineering:||Kunz - die innovativen Brandschutzplaner, Alexander Kunz, MSc|
|Gross floor area:||25,000 sq. m.|
|Rental space:||19,500 sq. m.|
|Size of property:||3,920 sq. m.|
|Type of building:||high-rise using innovative wood construction technology|
|Number of floors:||24 floors|
|Start of construction:||presumably spring 2016|
|Completion:||scheduled construction time 2 years|
|Investment volume:||approx. EUR 65 million|