- Obermayr Holzkonstruktionen is a timber construction company based in Austria that has been operating since 1933 and employs 80 people. - They specialize in glulam production and prefabricated timber structures for public, commercial, industrial, and residential buildings. - Integrated design between the builder, architect, engineer, and timber construction company is important for timber construction projects to optimize the design and reduce costs. - Examples of multi-story residential building projects in Austria demonstrated cost reductions of 7-13% through this collaborative design process and prefabrication.

1. Better Wood Products Seminar
‘The role of design in successful
pre-fabrication‘
DI Hans-Christian Obermayr
Obermayr Holzkonstruktionen GesmbH
Schwanenstadt, Austria

2. Contents
• Introduction of Obermayr Holzkonstruktionen
• Introduction of DI Hans-Christian Obermayr
• „The Surrounding System“
• Integrated design
• Examples
• Summary

3. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
• Roof-structures for industrial halls
– Pre-fabricated structures (roof, wall, ceiling)
• Public buildings
• Commercial- and industrial buildings
• Private buildings
• Multi-storey residential-buildings
• gobox
• Salt silo

4. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
• Roof-structure for industrial halls
Reform Werke, Wels Isolith Leichtbauplatten,
Straßwalchen
Head Office Dach und Wand,
Eberstalzell

5. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
– Pre-fabricated structures (roof, wall, ceiling)
• Public buildings
Secondary school and music school,
Schwanenstadt
Anton Bruckner Private University, Linz

6. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
– Pre-fabricated structures (roof, wall, ceiling)
• Public buildings
• Commerce- and industrial buildings
Food store Hofer Food store Spar

7. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
– Pre-fabricated structures (roof, wall, ceiling)
• Public buildings
• Commerce- and industrial buildings
• Private buildings
Private building, Zell am MoosPrivate building – bath house, Schwertberg

8. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
– Pre-fabricated structures (roof, wall, ceiling)
• Public buildings
• Commerce- and industrial buildings
• Private buildings
• Multi-storey residential-buildings
GIWOG Limesstraße, Leonding WAG Dragonerquartier, Wels

9. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
– Pre-fabricated structures (roof, wall, ceiling)
• Public buildings
• Commerce- and industrial buildings
• Private buildings
• Multi-storey residential-buildings
• gobox
PopUp Dorms - Students residence,
Seestadt Aspern, Vienna
Nursery school, Schwanenstadt

10. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
– Pre-fabricated structures (roof, wall, ceiling)
• Public buildings
• Commerce- and industrial buildings
• Private buildings
• Multi-storey residential-buildings
• gobox
Transport of gobox (16,8 x 5,5 x 3,8m)

11. Introduction
• Based in Schwanenstadt, Austria
• 80 employees
• Foundation 1933
• Products:
– Glulam-production
– Pre-fabricated structures (roof, wall, ceiling)
• Public buildings
• Commerce- and industrial buildings
• Private buildings
• Multi-storey residential-buildings
• gobox
• Salt silo – for storing of salt for road maintenance
Salt silo Liefering, Salzburg Salt silo, Raaba

12. Introduction of
Hans-Christian Obermayr
1985 – 1990: HTBLA Salzburg
1990 – 1997: Technical University in Graz, Studies Civilengineering and Economics
1998 – now: Obermayr Holzkonstruktionen GesmbH
since 2008: 50 % owner and director of Obermayr Holzkonstruktionen
- Speaker of advisory board of Furniture & Timber Construction Cluster
- Teaching activity at University of Art, Linz – course Überholz
- Developement of pre-fabricated structures
- Passive house norms
- Renovation with pre-fabricated elements
- Developement of module buildings (gobox)
- Timber-concrete-composite-ceilings
- System for multi-storey residential-buildings
 most of developement „inhouse“
• Know-how in pre-fabirication, structural analysis and building physics in our
company
• 6 civil engineers
• Several master-thesis with TU (Graz and Innsbruck)
• Cooperation

13. „The Surrounding System“
– the timber construction situation in Austria
• Small, but growing number of architects, with know-how in timber construction
• Still too few civil engineers with know-how of timber construction
• Increasing number of builders using timber construction
• Strong brick and concrete industry
 Situation is improving …

14. „The Surrounding System“
– approach for improvement
• pro:Holz
– Information/advertising
– Lobbying
– Timber Construction Awards
• Professor for timber construction architecture at university
– Tom Kaden
– Hermann Kaufmann
– Roland Gnaiger
• MHC – Furniture and Timber Construction Cluster
– Cooperation of companies
– Qualification/further Education
– Research and Developement
• University course Überholz
– Qualification/further Education
– Teamwork
– Carpenters, architects, civil engineers
 Growing pool of experts nationwide to push timber construction

15. Integrated Design
• Normal
 Builder
 Architect
 Civil engineer
 Call for tenders
 Construction company
 Realisation
• Timber Construction
 Builder
 Architect
+ civil engineer
+ building physics
+ timber construction company
 Realisation
Team
Obermayr

16. Examples – Multi-storey residential-buildings
GIWOG Leonding

17. Examples – Multi-storey residential-buildings
GIWOG Leonding

18. Examples – Multi-storey residential-buildings
GIWOG Leonding
• 20 Flats
– 1st Offer
- minus 13 % by optimizing together with builder and architect
– Last Offer
- minus 7 %
– Following project GIWOG Hörsching

19. Examples – Multi-storey residential-buildings
GIWOG Leonding
• Minus 13 % by common optimizing with builder and
architect
– Timber-concrete composite ceiling  wooden-beam ceiling
– Ceiling openings removed
– Number of windows reduced
– Facade changed

20. Examples – Multi-storey residential-buildings
GIWOG Leonding
• Minus 13 % by common optimizing with builder and
architect
– Timber-concrete composite ceiling  wooden-beam ceiling
– Ceiling openings removed
– Number of windows reduced
– Facade changed

21. Examples – Multi-storey residential-buildings
GIWOG Leonding
• Minus 13 % by common optimizing with builder and
architect
– Timber-concrete composite ceiling  wooden-beam ceiling
– Ceiling openings removed
– Number of windows reduced
– Facade changed

22. Examples – Multi-storey residential-buildings
GIWOG Leonding
• Minus 13 % by common optimizing with builder and
architect
– Timber-concrete composite ceiling  wooden-beam ceiling
– Ceiling openings removed
– Number of windows reduced
– Facade changed

23. Examples – Multi-storey residential-buildings
GIWOG Hörsching
• Minus 7 %
– Windows on top of each other  3 totally equal storeys
– Fire test  REI 90 same price as REI 60
– Simple ground plan: 30 wall panels instead of 44, but same number of flats

24. Examples – Multi-storey residential-buildings
GIWOG Leonding
• Minus 7 %
– Windows on top of each other  3 equal storeys
– Fire test  REI 90 same price as REI 60
– Simple ground plan: 30 wall panels instead of 44, but same number of flats

25. Examples – Multi-storey residential-buildings
GIWOG Leonding
• Minus 7 %
– Windows on top of each other  3 equal storeys
– Fire test  REI 90 same price as REI 60
– Simple ground plan: 30 wall panels instead of 44, but same number of flats

26. Examples – Multi-storey residential-buildings
WAG Dragonerquartier Wels
• 63 flats
• Wide spread opinion:
– Timber construction is more expensive than bricks or concrete
– „you can‘t build within cost limits of social housing with timber“
• MHC-Cooperation  builder = WAG
 architect
 Obermayr
• Developement of a timber construction wich fulfills
following specifications:

27. Examples – Multi-storey residential-buildings
WAG Dragonerquartier Wels
Developement of a timber construction wich fulfills
following specifications:
– Same price as brick/concrete
– Meet the cost limit of social housing
– Maximum pre-fabrication
– Fulfill fire-requirements
– Fulfill noise-requirements

28. Examples – Multi-storey residential-buildings
WAG Dragonerquartier Wels
Results:
– Simple structure

29. Examples – Multi-storey residential-buildings
WAG Dragonerquartier Wels
Results:
– Wooden facade

30. Examples – Multi-storey residential-buildings
WAG Dragonerquartier Wels
Results:
– No cross laminated timber but framework wall (except heavy loaded
internal wall in 6-storey building)

31. Examples – Multi-storey residential-buildings
WAG Dragonerquartier Wels
Results:
– Pillar, supporting beam, wooden-beam ceiling in 3-storey building

32. Examples – Multi-storey residential-buildings
WAG Dragonerquartier Wels
Results:
– CLT-internal wall + timber-concrete-composite-ceiling (visible!)
+ reinforced framework wall in 6-storey building

33. Examples – Multi-storey residential-buildings
WAG Dragonerquartier Wels
Results:
– Timber-concrete-composite-ceiling
• Developed together with TU Innsbruck (master thesis  software for
structural analysis)
• Very good noise-protection
• Very good fire-protection
• Slab for horizontal loads
• Visible surface

34. Examples – exhibition building
Showroom Einhell Landau, Germany
• Architectural design with
visible concrete
1. Concrete
2. Concrete prefabs
3. Timber structure by hand on site
in between
• Problems
– Glulam beam runs from inside to
external concrete pillar
including steel connector
building physics (?!)
– Working process; no pre-
fabrication

35. Examples – exhibition building
Showroom Einhell Landau, Germany
What we suggested:

36. Examples – exhibition building
Showroom Einhell Landau, Germany
What we suggested:

37. Examples – exhibition building
Showroom Einhell Landau, Germany
What we suggested:

38. Examples – exhibition building
Showroom Einhell Landau, Germany
What we suggested:

39. Summary
Targets of our work/design:
• Economical Design of timber construction
• Minimised material usage
• Maximised pre-fabrication
• Minimised number of elements
 Find an efficient solution of the timber construction for the builder
with „as good as possible“ realisation of architecture.

40. Thank you for your attention!