Calculate the weight of all the various elements (ie concrete deck with curbs, railings, asphalt and girders), this should be calculated based on a 1 m length of the bridge

You can ignore the weight of the steel bracing/bracing for this project (just consider the weight of the girders for the purpose of the weight of steel analysis) and the weight of the steel railing shown in the section view (while both would have to be considered in actual design)

The span as shown is 20m (center of support to center of support) and it is simply support (for our analysis), the Girders are all W530x272 spaced at 1.9m. Note will the deck is 9800mm wide the deck width for driving lanes is only 8800mm (Wc).

For the curb you can assume it is rectangular in geometry and a UDL where the curb sites (480mm wide) and that it is a constant 300mm thick (above the 225 deck thickness).

GIDERA W130x272 w310x129 C310x31 :310 31 W310x129 GIRDERS W130x272 . . . . . . . . . .. wash-120 GILDER C W130x272 w31x129 C310x31 310.31 V310x1:9 5 SPACES . 1850 - 9009 W315x129 C310x31 310131 W310x129 GUDER S W130xx272 w31kx129 C310x.3: 310x3: (310131 W310429 GIRDER F W130x272 12400 S SPACES O 5000 - 20090 STAN 480 50mm ASPHALT AND WATERPROOF -225mm CONCRETE Stimm CURKULATED .9:4mm THICK GALVANIZED CECC PAN 2% O 105 TYP -38 324 FOR 622x57 A321 C310