Week 1 Challenge

Dead load is self weight of structure.

As girder is symmetric abt centre line. So let us calculate half of the section.

We have,

Width= 10.2 m, half = 5.1m

Unknown 'A'= 0.9m

Let us part the structure into different members for find out cross section area

Member 1, A1= 1.361×.225= .30625

                    A2= 1.200×.225= .270

                    A3= .269×.350= .09

                    A4= 1.370×.225=.30825

                    A5= .9× .225= .2025

                    A6= 1.200×.125= .15

                    A7= 1.370×.125=.17125

                    A8= 2.41×.250= .6025

                     A9= 2.01×.2= .42

Total c/s= 2.52m^2

Total c/s area of superstructure= 2.52×2= 5.0415m^2

Dead load of superstructure box girder= 5.0415×25= 126.04kn/m.