242) The minimum depth of foundation in clayey soils is

243) The maximum total settlement for raft foundation on clayey soils should be limited to

244) The bearing capacity of a water logged soil can be improved by

245) The type of flooring suitable for use in churches, theatres, public libraries and other places where noiseless floor covering is desired is

246) The vertical distance between the springing line and highest point of the innercurve of an arch is known as