Section 12(6)(d) in West Bengal Municipal (Building) Rules, 2007
(d)the sizes of footings, the thickness of basement walls, other walls. floor and roof slabs, the construction materials, sizes and spacing of framing members, floor to ceiling heights, parapet heights with their materials, taking at least one fully dimensioned section (both longitudinally and crosswise) through staircase, bath and water-closet as well as such other sections as would clearly indicate the details of architectural features, mezzanine floors, and lofts;