Abstract: Disclosed is a structural element including of interlocked resilient sheet material components, with each sheet operatively forming a component 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 base than the first extension, with the first and second extensions being provided with complimentary interlocking means operatively enabling the extensions of one sheet material component to be interlocked with the extensions of another sheet material component; with the extensions of four sheet components being interlocked, each at a right angle with at least one extension of another one of the sheet components, operatively for four sheet components to provide the structural element with an elongate open-ended core with a plurality of elongate open-ended ribs spaced around the core with each rib being longitudinally aligned with the core.

Abstract: Disclosed is a structural element including of interlocked resilient sheet material components, with each sheet operatively forming a component 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 base than the first extension, with the first and second extensions being provided with complimentary interlocking means operatively enabling the extensions of one sheet material component to be interlocked with the extensions of another sheet material component; with the extensions of four sheet components being interlocked, each at a right angle with at least one extension of another one of the sheet components, operatively for four sheet components to provide the structural element with an elongate open-ended core with a plurality of elongate open-ended ribs spaced around the core with each rib being longitudinally aligned with the core.

Abstract: Rail transport bogie (1) configured to operate on a track (2) having track surfaces (3,4) on opposite sides thereof and an slot (5) extending along substantially the center of the track (2), the bogie (1) comprising a load-bearing wheel (9) to run on a first (3) of the two track surfaces, a support shaft (11) extending from the load-bearing wheel (9) operatively through the slot (5) in the track (2) and terminating in load support means (8), a first pinch wheel (12) rotatably secured in a forward position (20) in respect of the support shaft (11) and a second pinch wheel (13) rotatably secured in rearward position (21) in respect of the support shaft (11), with both the first (12) and second (13) pinch wheels located between the load-bearing wheel (9) and load support means (8) to run on the second (4) of the two track surfaces, the load-bearing wheel (9) and pinch wheels (12,13) clamping between them the bogie (1) to the opposing track surfaces (3,4), and at least one of the load-bearing wheel (9) and either

Abstract: Rail transport bogie (1) configured to operate on a track (2) having track surfaces (3,4) on opposite sides thereof and an slot (5) extending along substantially the centre of the track (2), the bogie (1) comprising a load-bearing wheel (9) to run on a first (3) of the two track surfaces, a support shaft (11) extending from the load-bearing wheel (9) operatively through the slot (5) in the track (2) and terminating in load support means (8), a first pinch wheel (12) rotatably secured in a forward position (20) in respect of the support shaft (11) and a second pinch wheel (13) rotatably secured in rearward position (21) in respect of the support shaft (11), with both the first (12) and second (13) pinch wheels located between the load-bearing wheel (9) and load support means (8) to run on the second (4) of the two track surfaces, the load-bearing wheel (9) and pinch wheels (12,13) clamping between them the bogie (1) to the opposing track surfaces (3,4), and at least one of the load-bearing wheel (9) and either