1. CENTRE FOR BUILDING TECHNOLOGY Institute for Timber Engineering and Wood Technology, TU Graz / Austria Case study no. 10 Leonardo da Vinci project no. CZ/06/B/F/PP-168007 WP6 – Case Studies PC 3 – A set of case studies

2. General Information Type of building: Laboratory (hall) and office building Structural System: Suspended CLT-elements, ripped CLT-plates, walls with boxed cross sections Owner: Federal Building Agency (BIG), Vienna / Austria Location: Graz / Austria Erection date: 1999 (begin) - 2001 (1st erection step finished) Architectural design: Arch. Nussmüller /, Graz / Austria Arch. Kampits & Gamerith, Graz / Austria Structural & constructional design, Building physics: Institutes of the Faculty for Civil Engineering, Graz University of Technology Manufacturer of timber structure: Stingl GesmbH, Trofaiach / Austria

3. Offices Plans (Erection step 1) Plan (with dimensions) Laboratory hall

4. Cross section Laboratory hall Office

5. Walls Boxed cross-section utilising cross-laminated element (CLT) rigidly glued with glulam rips

6. Roof above laboratory hall 5-layered CLT-plate (120 mm) suspended by steel trestles (tubes) and steel rods; span: 19,48 m

7. Roof above offices 5-layered CLT-element screw-pressed glued with glulam rips (GL32h, 140/280 mm, every 600 mm) Width per element 2400 mm Span: 14,0 m

8. Detail: Walls Special fastener system (steel ring and glued-in rods) at the longitudinal edges of the prefabricated elements Simple connection of the prefabricated elements with steel angles at the bottom and the first floor on the reinforced concrete structure

9. Detail: Roof above laboratory hall Steel part for load introduction of steel rods into the CLT- plate Joint of the CLT- plate (necessary due to limited production length) Detail of the steel trestles: drilled holes for the anchoring of the suspension rods Steel trestles (tubes) for the suspending system of the CLT- elements

10. Detail: Roof above offices Joint rips – wall: by means of slotted- in steel plate with dowels Joint deck (CLT) – wall: by means of bearing of on the CLT-element of the wall and selftapping screws Bearing area of the roof above offices: bearing on reinforced concrete walls by means of slotted-in steel plates and special elastomeric layers

11. Assembling / Erection Offices High level of pre- fabrication for wall and roof elements Lifting by means of auto-cranes Short erection time

12. Assembling / Erection Lab Hall

13. Impressions

14. Laboratory hallOffice

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