d) Fig 1: 5.6 m 6.6 m The drops when provided shall be rectangular in plan, and have a length in each direction not less than one- third of the panel length in that direction. For exterior panels, the width of drops at right angles to the non- continuous edge and measured from the centre -line of the columns shall be equal to one -half the width of drop for interior panels. Since the span is large it is desirable to provide drop. Drop dimensions along: Hence provide a drop of size 2.2 x 2.2 m i.e. in column strip width. e) column head :
Where column heads are provided, that portion of a column head which lies with in the largest right circular cone or pyramid that has a vertex angle of 90”and can be included entirely within the outlines of the column and the column head, shall be considered for design purposes (see Fig. 2). 8 1.4 m C.S 3.8 M.S m D 1.4 m rops : C.S 1.4 m C.S 2.8 M.S m 1.4 m C.S 3.8 M.S m 2.8 M.S m Longer span Shorter span L =6.6 m , L =5.6 m 1 2 Not less than L /3 = 2.2 m 1 L =5.6 m , L =6.6 m 1 2 Not less than L /3 = 1.866 m 1