ReciproBoo: the shelter concept and design

The reciprocal frame concept


When the 4 frame poles of the ReciproBoo roof are overlapped reciprocally they will support a considerable weight.

The simple shelter design


By adding just one more pole to this 4 pole frame we achieved the stability and strength that is central to ReciproBoo shelter design.

- 4 reciprocally overlapping poles ABC and D provide
the strength and the required span.

- A single ridge pole E and three side ropes FG and H
 provide the stability.

- The points where poles meet are simply cross lashed
with sisal twine to form a flexible but strong joint.

The unit is now ready to be used for shelter construction or repairing an existing roof.


The emergency shelter frame

Taking this roof frame and elevating it with two poles completes the emergency shelter frame.

Note how the support poles fit inside the frame so they can take the tension from two lateral guy ropes.

The proportions of the frame in the design produce an inclination of approximately 30 degrees to the ground. In practice this functions well to support the required loads

Key design points of the steel shelter


Design uses 33% less steel than conventional frames

Steel shelter design options

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