practical shelter innovation for disaster relief

ReciproBoo storm shelter wind tunnel tests.

Update:August 2014.

The tests were part of a B.Eng(Hons) Architecture and Environmental engineering study by Fatima Heras at the University of the West of England (UWE).

Quote from test conclusions:

" The objective of this research was to provide practical evidence of the capabilities of the Reciproboo under high wind conditions. This objective was achieved by testing the performance of the structure in a high speed wind tunnel. For the range of velocities applied in the wind tunnel, the frame holds out really well. Based on this analysis it was predicted that the frame could withstand, without reaching failure, number 7 in the Beaufort Scale: High winds, moderate gale or near gale where effort is needed to walk against the wind. The conclusions drawn from the findings, answer the question of the dissertation. The ReciproBoo can withstand high wind conditions and it has been proved to be safe "

The original report on these tests is set out below:

The Reciproboo storm shelter has undergone successful wind tunnel testing as part of an engineering project at University of the West of England (UWE).

The tests were carried out in the high speed wind tunnel at UWE under laboratory conditions. Sensitive electronic sensors were located at strategic points on the frame and a rope hook to record deformation under increasing wind loading. The data will now be analysed and published as part of an engineering project.

The shelter performed very well under all the rigorous test conditions. Indeed , considering that lack of space in the test tunnel prevented lateral anchoring of the two guy ropes, it actually exceeded stability expectations.


Reciproboo frame wired with 8 electronic sensors attached.


Reciproboo frame covered with standard relief tarpaulin in wind tunnel


As wind speed increases the shelter roof flexes and becomes a strong self-supporting frame at its centre.


Side ropes supported the tarpaulin well as the roof flexed under testing wind turbulence.

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