A portable, height-adjustable gangway includes a lower tower structure comprising a lower landing and a lower movement assembly comprising a first set of wheels permitting the lower tower structure to travel over ground, an upper tower structure comprising an upper landing, an upper movement assembly comprising a second set of wheels permitting the upper tower structure to travel over ground, and an extending tower support connecting the upper movement assembly and the upper landing and comprising expandable struts configured to move the upper landing towards and away from the upper movement assembly, and a travellator pivotally connected to the lower tower structure and pivotally connected to the upper tower structure such that, when the expandable struts of the tower support extend at least one of towards and away from the upper movement assembly, the escalator tilts. The escalator can be a continuous set of stairs, a gondola-like trolley, or both.

A portable, height-adjustable gangway includes a lower tower structure comprising a lower landing and a lower movement assembly comprising a first set of wheels permitting the lower tower structure to travel over ground, an upper tower structure comprising an upper landing, an upper movement assembly comprising a second set of wheels permitting the upper tower structure to travel over ground, and an extending tower support connecting the upper movement assembly and the upper landing and comprising expandable struts configured to move the upper landing towards and away from the upper movement assembly, and a travellator pivotally connected to the lower tower structure and pivotally connected to the upper tower structure such that, when the expandable struts of the tower support extend at least one of towards and away from the upper movement assembly, the escalator tilts. The escalator can be a continuous set of stairs, a gondola-like trolley, or both.

A crawler bridge (10) having a bridge section (12) for bridging across opposite sides of a gap G. The bridge section (12) being connected to a support structure (14) which has a pair of elongate beams (16,17), that are spaced apart and generally parallel. The beams (16,17) each including leading and trailing feet (18,19). The bridge section (12) is attached to the beams (16,17) for relative movement forward and backward along the beams (16,17) and vertically up and down. The crawler bridge (10) has a first mode of operation when the leading and trailing feet 18,19 of the beams (16,17) are in engagement with a ground surface, in which the bridge section (12) is supported by the support structure (14) elevated above the ground surface and is movable forward and backward along the beams (16,17) and vertically up and down. The crawler bridge (10) has a second mode of operation when the bridge section (12) has been moved downward relative to the beams (16,17) and into engagement with a supporting surface, in which the leading and trailing feet (18,19) of the beams (16,17) are lifted away from the supporting surface and the beams (16,17) are movable forward and backward relative to the bridge section (12) and vertically up and down relative to the bridge section (12).

A crawler bridge (10) having a bridge section (12) for bridging across opposite sides of a gap G. The bridge section (12) being connected to a support structure (14) which has a pair of elongate beams (16,17), that are spaced apart and generally parallel. The beams (16,17) each including leading and trailing feet (18,19). The bridge section (12) is attached to the beams (16,17) for relative movement forward and backward along the beams (16,17) and vertically up and down. The crawler bridge (10) has a first mode of operation when the leading and trailing feet 18,19 of the beams (16,17) are in engagement with a ground surface, in which the bridge section (12) is supported by the support structure (14) elevated above the ground surface and is movable forward and backward along the beams (16,17) and vertically up and down. The crawler bridge (10) has a second mode of operation when the bridge section (12) has been moved downward relative to the beams (16,17) and into engagement with a supporting surface, in which the leading and trailing feet (18,19) of the beams (16,17) are lifted away from the supporting surface and the beams (16,17) are movable forward and backward relative to the bridge section (12) and vertically up and down relative to the bridge section (12).

A portable, height-adjustable gangway includes a lower tower structure comprising a lower landing and a lower movement assembly comprising a first set of wheels permitting the lower tower structure to travel over ground, an upper tower structure comprising an upper landing, an upper movement assembly comprising a second set of wheels permitting the upper tower structure to travel over ground, and an extending tower support connecting the upper movement assembly and the upper landing and comprising expandable struts configured to move the upper landing towards and away from the upper movement assembly, and a travellator pivotally connected to the lower tower structure and pivotally connected to the upper tower structure such that, when the expandable struts of the tower support extend at least one of towards and away from the upper movement assembly, the escalator tilts. The escalator can be a continuous set of stairs, a gondola-like trolley, or both.

A portable, height-adjustable gangway includes a lower tower structure comprising a lower landing and a lower movement assembly comprising a first set of wheels permitting the lower tower structure to travel over ground, an upper tower structure comprising an upper landing, an upper movement assembly comprising a second set of wheels permitting the upper tower structure to travel over ground, and an extending tower support connecting the upper movement assembly and the upper landing and comprising expandable struts configured to move the upper landing towards and away from the upper movement assembly, and a travellator pivotally connected to the lower tower structure and pivotally connected to the upper tower structure such that, when the expandable struts of the tower support extend at least one of towards and away from the upper movement assembly, the escalator tilts. The escalator can be a continuous set of stairs, a gondola-like trolley, or both.

A modular bridge is formed from a plurality of bridge modules. In one embodiment, the bridge includes: a first longitudinal compression member that is, in use, at an upper part of the bridge cross-section; a second longitudinal compression member that is, in use, at a lower part of the bridge cross-section; a structural lateral element for forming a deck of the bridge or for supporting deck elements of the bridge; a shear element for carrying a shear load; and a tension member applying a compressive force to one of the longitudinal compression members such that when in use the other of the longitudinal compression members forms a main compression element for the bridge and the tension member forms a main tension element for the bridge. The bridge modules form segments of the length of the bridge and each bridge module is of a one-piece construction.

A modular bridge is formed from a plurality of bridge modules. In one embodiment, the bridge includes: a first longitudinal compression member that is, in use, at an upper part of the bridge cross-section; a second longitudinal compression member that is, in use, at a lower part of the bridge cross-section; a structural lateral element for forming a deck of the bridge or for supporting deck elements of the bridge; a shear element for carrying a shear load; and a tension member applying a compressive force to one of the longitudinal compression members such that when in use the other of the longitudinal compression members forms a main compression element for the bridge and the tension member forms a main tension element for the bridge. The bridge modules form segments of the length of the bridge and each bridge module is of a one-piece construction.

A modular bridge is formed from a plurality of bridge modules (4), the bridge (2) having a longitudinal direction along the spanning direction and including: a first longitudinal compression member (11,13, 70) that is, in use, at an upper part of the bridge cross-section; a second longitudinal compression member (9, 72) that is, in use, at a lower part of the bridge cross-section; a structural lateral element (9) for forming a deck of the bridge or for supporting deck elements of the bridge; a shear element (14, 16) for carrying a shear load; and a tension member (6) applying a compressive force to one of the longitudinal compression members (1,13, 70); (9, 72) such that when in use the other of the longitudinal compression members (1,13, 70); (9, 72) forms a main compression element for the bridge (2) and the tension member (6) forms a main tension element for the bridge (2). The bridge modules (4) form segments of the length of the bridge (2) and each bridge module (4) is of a one-piece construction, this single piece including: a segment (10, 12) of the first longitudinal (1) compression member of the bridge; a segment (8) of the second longitudinal compression member of the bridge; a segment (8) of the structural lateral element; and a segment (14, 16) of the shear element; and the bridge modules being arranged to support a portion of the tension member (6).

A modular bridge is formed from a plurality of bridge modules (4), the bridge (2) having a longitudinal direction along the spanning direction and including: a first longitudinal compression member (11,13, 70) that is, in use, at an upper part of the bridge cross-section; a second longitudinal compression member (9, 72) that is, in use, at a lower part of the bridge cross-section; a structural lateral element (9) for forming a deck of the bridge or for supporting deck elements of the bridge; a shear element (14, 16) for carrying a shear load; and a tension member (6) applying a compressive force to one of the longitudinal compression members (1,13, 70); (9, 72) such that when in use the other of the longitudinal compression members (1,13, 70); (9, 72) forms a main compression element for the bridge (2) and the tension member (6) forms a main tension element for the bridge (2). The bridge modules (4) form segments of the length of the bridge (2) and each bridge module (4) is of a one-piece construction, this single piece including: a segment (10, 12) of the first longitudinal (1) compression member of the bridge; a segment (8) of the second longitudinal compression member of the bridge; a segment (8) of the structural lateral element; and a segment (14, 16) of the shear element; and the bridge modules being arranged to support a portion of the tension member (6).