University of Canterbury Prestressed Flooring System

University of Canterbury Prestressed Flooring System

Our great friends at the University of Canterbury were in a bind. They needed to test some large cassette-sections of structural floor, however there laboratory was fully booked for months. They also needed the testing in a hurry and knowing this is one of our specialities, they came to us for help. We tested 6 specimens of their innovative prestressed timber and concrete cassette flooring system. With spans of up to 9.2m, large loads and all specimens tested to failure, this was 4 point bending at its best.

University of Canterbury Prestressed Flooring System

The University of Canterbury has been doing a lot of work in innovative timber structures. They have been experimenting with the incorporation of prestressing and post-tensioning as a means of creating more resilient buildings. One of these innovations is the 3PT prestressed flooring system. It is a panellised system that incorporates timber box beams sandwiched by two reinforced concrete end sections. The entire panel is then prestressed to create a positive camber. The intention is to develop a stiff and strong floor panel that permits greater spans than possible with timber alone.

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This innovative system required testing before it could be used in the real world. Unfortunately, the university’s test laboratory was fully booked for months. Commercial demand for the system meant that they had an urgent need for testing. Knowing our reputation for completing projects quickly, our friends at the university gave us a call. Ten days later they had their results – cyclic testing at the serviceability limit state of 5 panels in 4 point bending, and cyclic testing of one panel in shear. Finally, each panel was pushed to its ultimate limit state and beyond until failure. 

If you would like more information regarding our services, please contact us on +64 3 363 2180 or email info@holmessolutions.com.

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