The second$-$floor plan for an office building is shown as below:

Design a reinforced concrete Girder$-$Joist$-$Slab floor system to support the structural loads for the floor assuming the superimposed dead load $($excluding the self$-$weight of the structural system$)=20psf$ and live load $=40psf.$ Use concrete with $f_c^{\text{'}}=4000$ and reinforcing steel with $f_y=60,000$ psi.

Task:

I: Sketch the locations of columns and layout of girders and joists. Ensure the slab system includes only one$-$way slabs.

II: Design the one$-$way slabs over the floor plan and sketch the layout of the slab reinforcement including the sizes and spacings of bars and ACI$318$ required concrete cover thickness.

III: Design the joists and sketch the layout of the joist reinforcement including the sizes and spacings of bars and ACI$318$ required concrete cover thickness.

IV: Design the girders and sketch the layout of the girder reinforcement including the sizes and spacings of bars and ACI$318$ required concrete cover thickness.