If f = coefficient of friction, A = total area of steel in cm2 across the slab width, S = allowable tensile stress in steel in kg/cm2, h = slab thickness in cm, W = unit weight of cement concrete in kg/m3, b = slab width in m; then what is the spacing of contraction joints (LC) in reinforced cement concrete pavements?
1
\(\rm LC = \frac{200 WSb}{Shf}\)
2
\(\rm LC = \frac{200 SA}{bhWf}\)
3
\(\rm LC = \frac{200 bhW}{SAf}\)
4
\(\rm LC = \frac{20000 S}{Wf}\)