A composite bridge deck including U shaped reinforced concrete and steel girders, and construction methods thereof. The bridge deck consists of a plurality of steel main girders with unsymmetrical top flange, the plurality of cross girders being connected above bottom flange of main girders and U shaped RCC girder comprising of concrete flange above main girder, web and deck slab above cross girder. Inspection path/crash barrier provided for Rail/Road. This bridge deck is adoptable up to 3 Tracks/four lane Roads. In Cast in situ construction, main girders are placed over supports. Cross girders are connected and concreted. In precast construction, main girder with top slab is precast and placed over supports. Two or more cross girders with precast slab are connected to web of main girder. Concrete web portion is cast in situ.

An elongated girder for use in a bridge includes a girder body having a modified V-shaped cross section. The body includes longitudinally extending webs defining sides of the girder, a bottom flange extending between the webs, and top flanges extending outwardly from the webs.

An elongated girder for use in a bridge includes a girder body having a modified V-shaped cross section. The body includes longitudinally extending webs defining sides of the girder, a bottom flange extending between the webs, and top flanges extending outwardly from the webs.

A system of construction of composite U shaped Reinforced Concrete and Steel girders bridge deck and methods thereof are disclosed. The system consists of a plurality of steel main girders with unsymmetrical top flange plurality of cross girders being connected above bottom flange of main girders and U shaped RCC girder comprising of concrete flange above main girder, web and deck slab above cross girder. Inspection path/crash barrier provided for Rail/Road. System is adoptable upto 3 Tracks/four lane Road. In Cast in situ construction, main girders are placed over supports. Cross girders are connected and concreted. In precast construction, main girder with top slab is precast and placed over supports. Two or more cross girders with precast slab are connected to web of main girder. Concrete web portion is cast in situ.

An elongated girder for use in a bridge includes a girder body having a modified V-shaped cross section. The body includes longitudinally extending webs defining sides of the girder, a bottom flange extending between the webs, and top flanges extending outwardly from the webs.

An elongated girder for use in a bridge includes a girder body having a modified V-shaped cross section. The body includes longitudinally extending webs defining sides of the girder, a bottom flange extending between the webs, and top flanges extending outwardly from the webs.

The invention relates to an overhead guided-transport track span having a U-shaped cross section, the two arms of which form lateral walls (4, 5) of said track, and the central region of which, connecting the two arms, forms a load-bearing slab (6) of said track, characterised in that said load-bearing slab (6) comprises at least one groove (10, 11) that is provided in said slab longitudinally along said span and is designed to be able to receive a running support (12, 13) of a guided-transport vehicle intended to travel on said track.

The invention relates to an overhead guided-transport track span having a U-shaped cross section, the two arms of which form lateral walls (4, 5) of said track, and the central region of which, connecting the two arms, forms a load-bearing slab (6) of said track, characterised in that said load-bearing slab (6) comprises at least one groove (10, 11) that is provided in said slab longitudinally along said span and is designed to be able to receive a running support (12, 13) of a guided-transport vehicle intended to travel on said track.

This invention is an improved side section for a marine gangplank/gangway structure. This side section has a unique visually appealing design and provides gangplanks with resistance to twisting and increased live load capacity. The side sections of this invention can be used to reduce the weight and cost of gangplanks while improving durability. This marine structure comprises (1) a horizontal base section, (2) a vertical base, (3) a horizontal spacer, (4) a sigma spring section which extends upwardly from the inside end of the horizontal spacer in a circumferential manner, (5) a lower deck support, wherein the lower deck support extends horizontally from the top end of the sigma spring section, and wherein the lower deck support includes a fulcrum which is situated on the top of the lower deck support, (6) a vertical deck support, and (7) an upper deck.

This invention is an improved side section for a marine gangplank/gangway structure. This side section has a unique visually appealing design and provides gangplanks with resistance to twisting and increased live load capacity. The side sections of this invention can be used to reduce the weight and cost of gangplanks while improving durability. This marine structure comprises (1) a horizontal base section, (2) a vertical base, (3) a horizontal spacer, (4) a sigma spring section which extends upwardly from the inside end of the horizontal spacer in a circumferential manner, (5) a lower deck support, wherein the lower deck support extends horizontally from the top end of the sigma spring section, and wherein the lower deck support includes a fulcrum which is situated on the top of the lower deck support, (6) a vertical deck support, and (7) an upper deck.