The structure was loaded with 1400 kg to simulate a heavy snowfall and with up to 500 kg in the horizontal directions to simulate the power of the wind.
All the three trusses involved in the measurements demonstrated a linear elastic behaviour with deformation values compatible with use conditions. Nevertheless some compressed beams denounced a minor stability than what is prescribed by law.
After examining various possible solutions, the decision taken was to stiffen the structure locally by adding some elements to reduce the span of the lower beams of the trusses. This increased the structural stability and made it possible for the Pavilion to obtain the Certificate of Static Suitability. 

From the static point of view, there is still something that needs further research: the incidence of cracks on the mechanical performance of bamboo in the various structural elements. 
In order to define the acceptability criteria for the longitudinal cracks in Guadua culms affecting its structural resistance, the Studio De Miranda has developed for us an initial theorical model.

Considering critical for a cracked bamboo culm the compression force of 100 N/mm2 or 1.000 kg/cm2, the ultimate extreme state of local instability has been examined by distinguishing two possible situations: the presence of one single crack and of two or more parallel cracks.
For the first situation, the finding given by the model is equal to 1.900 mm, which means that the culm mantains its complete structural efficiency if the crack length is lesser than 1.900 mm long, and this according to the safety factor recommended by the ISO draft that is currently under discussion.
In the second situation, if the minimum distance between two adjiacent cracks is within 10 and 50 mm, the average out the lengths of the two cracks must be less than 135 mm. If the minimum distance between the two adjacent cracks is within 50 and 100 mm, the same average length must be lesser than 2.9 x the distance – 10 mm.
In case these extreme values are exceeded, the culm should be restored or structurally downgraded. The restoration of the original bearing capacity can be obtained by sealing the cracks with resins and applying circumferencial narrow bands at an interaxis equal to half of the extreme length of the crack.

reduced bearing capacity = K2 x original bearing capacity
(where K is the ratio between the value of the extreme length and the actual measured one)

Now the Bamboo Pavilion in Vergiate has begun its real life whose span will depend on climate and environmental conditions, but also on the cure provided by humans.

References

1. (various authors) Grow Your Own House, Vitra Design Museum – ZERI, 2000

2.  Braulin, N., Chioetto, V., Cardenas Laverde, M.: New Materials for Sustainable Architecture: Bamboo Structures in the Ticino Park – OFX International Magazine: Architecture, Design, Contract - No. 74 - Sept./Oct. 2003

3. Gutierrez, J. A. Structural Adequacy of Traditional Bamboo Housing in Latin America INBAR Tech. Rep. 19., 2000

4. Janssen, J.A.: Design and Building with Bamboo. INBAR Techn. Report No. 20, 2000; Bamboo in Building Structures. Doctoral Thesis in Technical Science at Eindhoven University of Technology, 1981

5. Jayanetti, D.L. and Follett, P.R.: Bamboo in Construction. INBAR Techn. Report no 15, 1998

6. An International Model Building Code for Bamboo. INBAR, 1999, draft document
7. Liese, W. and Kumar, S. Bamboo Preservation Compendium. INBAR Techn. Report no 22, 2003

8. Vantomme P., Braulin N., Chioetto V., Liese W.: Public Constructions made with Bamboo: lessons learnt from the Vergiate Bamboo Pavilion in Northern Italy. Journal of Bamboo and Rattan, Vol. 2, N. 4, pp 369-380, 2003