A structural element

A structural element, comprising:

• a plurality of interlocked resilient sheet material components, each of the plurality of interlocked resilient sheet material components operatively forming a component of the structural element by being shaped to provide an elongate base with two opposing edges from which a first extension and a second extension respectively extend, with the second extension extending further from the elongate base than the first extension;
• wherein the first and second extensions are provided with complimentary interlocking means operatively enabling the extensions of one of the plurality of interlocked resilient sheet material components to be interlocked with the extensions of another sheet material component of the plurality of interlocked resilient sheet material components;
• wherein the first and second extensions of four sheet components of the plurality of interlocked resilient sheet material components being interlocked, each at a right angle with at least one extension of another one of the plurality of interlocked resilient sheet material components;
• wherein operatively for four sheet components of the plurality of interlocked resilient sheet material components to provide the structural element with an elongate open-ended core with a plurality of elongate open-ended ribs spaced around the elongate open-ended core with each of the plurality of elongate open-ended ribs being longitudinally aligned with the elongate open-ended core.