Problem:$2$ The plan of a RCC framed school building is shown in Fig. $1.$

Figure $1$: Building plan

Given data:

$($i$)$ The length $($C$/$C$),L_1=7000mm$

$($ii$)$ The width of corridor $($C$/$C$),L_2=2000mm$

$($iii$)$ The length $($C$/$C$),L_3=7000mm$

$($iv$)$ The spacing of each bay $($C$/$C$),L_{\text{b}\text{a}\text{y}}=4000mm$

$($v$)$ The floor to floor height, $H=3500mm$

$($vi$)$ The depth of foundation below ground level, $D_f=2000mm$

$($vii$)$ The width of external walls is $250$ mm

$($viii$)$ The width of inner walls is $125$ mm

$($ix$)$ Initally, the building will be constructed for $G+3$ floors. The provision for one

more floor is kept for future expansion. The following plinth area rates may be used for calculation of the cost of construc$-$

tion

$($i$)$ RCC framed structure, floor height $2\mathrm{.}9$ m $,$ the rate is Rs$\mathrm{.}9100/$per sq$.$m

$($ii$)$ Every $0\mathrm{.}3$ m additional height of floor above normal height of $2\mathrm{.}9$ m $,$ the rate is

Rs$\mathrm{.}150/$per sq$.$m

$($iii$)$ Every $0\mathrm{.}3$ m deeper foundation over normal depth of $1\mathrm{.}2$ m $,$ the rate is Rs$.150/$per

sq$.$m

$($iv$)$ Making stronger foundations for taking load of one additional floor at a later

date, the rate is Rs$\mathrm{.}1250/$per sq$.$m

$($v$)$ Resisting earthquake forces, the rate is Rs$.\frac{630}{?}$ per sq$.$m

$($vi$)$ RCC raft foundations $($Ground floor only$),$ the rate is Rs$\mathrm{.}3560/$per sq$.$m

The following percentage may be used for calculation of the cost of internal water

supply, sanitary and electrical works:

$($i$)$ Internal water supply and sanitay installations, $10\mathrm{.}0\%$

$($ii$)$ External service connections, $5\mathrm{.}0\%$

$($iii$)$ Internal electric installations, $12\mathrm{.}5\%$

$($iv$)$ Miscellaneous, $3\mathrm{.}0\%$

Calculate:

$($i$)$ Plinth area of ground floor considering width of external walls as $250$ mm $.$

$($ii$)$ The total plinth area to be constructed at present.

$($iii$)$ Cost of RCC framed structure, floor height $2\mathrm{.}9$ m

$($iv$)$ Additional cost for a floor height of $3500$ mm

$($v$)$ Cost for a foundation depth of $2000$ mm

$($vi$)$ Cost for making stronger foundations for taking load of one additional floor

at a later date

$($vii$)$ Additional cost for resisting earthquake forces

$($viii$)$ Cost for RCC raft foundations

$($ix$)$ Total cost of civil works

$($x$)$ Cost for internal, water and electrical works

$($xi$)$ Total cost

$($xii$)$ Rate per sq$.$m of plinth area