Culverts serves primarily as the hydraulic conduits conveying water from one side of a roadway or similar traffic
embankment to the other; therefore, culverts serves the dual purposes of functioning as hydraulic structures as well as acting as
traffic load bearing structures. They are normally cheaper than bridges, which make them the natural stream passes through
channels. Box culvert are most stable and safe among various types of culverts. It can be constructed for soft soil conditions also.
Therefore these are the best alternative to the major bridges for the small span and for cross drainage situation. In this work, we
analyze the R.C. box culvert of two cell and three cell with different L/H ratio with the use of STAAD Pro software.