(Solved): Design a post-tensioned prestressed concrete \( \mathrm{T} \)-beam slab bridge-deck for a, national ...

Design a post-tensioned prestressed concrete \( \mathrm{T} \)-beam slab bridge-deck for a, national highway crossing to suit the following data: 1. Data Effective span \( =30 \mathrm{~m} \) Width of road \( =7.5 \mathrm{~m} \) Kerbs \( =600 \mathrm{~mm} \) on each side Footpath \( =1.5 \mathrm{~m} \) wide on each side Thickness of wearing coat \( =80 \mathrm{~mm} \) Live load \( = \) IRC class AA tracked vehicle For the deck slab, adopt M-20 grade concrete For prestressed concrete girders, adopt M-50 grade concrete with cube strength at transfer as \( 40 \mathrm{~N} / \mathrm{mm}^{2} \) Loss ratio \( =0.85 \) Spacings of cross girders \( =5 \mathrm{~m} \) Adopt Fe-415 grade HYSD bars. 7-ply H.T. strands of \( 15.2 \mathrm{~mm} \) diameter conforming to IS: 6006-1983 are available for use. Design the girder as class-1 type structure.