A methodology for the design of steel fibre reinforced concrete (SFRC) pavements and slabs-on-grade is suggested incorporating the equivalent flexural strength to account for the residual moment carrying capacity. The design methodology is a modification of the yield line theory proposed by Concrete Society Report TR34 (2002). The methodology proposed has the advantage that it extends the familiar design methods of plain concrete slabs-on-grade design. Based on cost analysis, optimization of dosage of fibres and thickness has also been attempted to obtain economical solutions for typical loading.