## How to Study Drawing For the Column and Boundary Wall

The plan of boundary wall and we have taken the scale ¼ inch is equal to 1 feet.

There are two columns. There is a centre line (denoted by CL) for the boundary wall. There are two centre lines for the columns. The foundations for one column are 3 feet and 3 feet and for second column are 2.5 feet and 2.5 feet.

But, keep in mind that the actual dimensions of both the columns are 13.5 inches and 13.5 inches. The breadth of the wall is 9 inches. There is one inside and one outside of the plan. There is a plaster. The length of the wall is between two columns is 12 feet.

Now, let us see the elevation for outside of this column. It will show the NGL which is natural ground level FGL which is finished ground level (inside). The height of the column or the height of the wall is 7 foot and 6 inches. The walls are continued from both sides.

The cross section of the column will show the dimension of the column which is equal to 2.5 feet and the other column is 3 feet. The scale is 3/8 inches is equal to one foot.

Now, let us examine the cross-section for the column. It uses the class D concrete. Depth is 6 inches and for the second step, the depth is 6 inches.

From foundation to natural ground, the depth from natural ground level to foundation is 30 inches.

When two sides are subtracted from the first step, then the second step becomes 22 ½ inches x 22 ½ inches.  When two sides are subtracted from the second step, then the third step becomes 18 inch x 18 inch. 13 ½ inch x 13 ½ inches is the actual dimension of the column. It can be matched with top views and other views.

The height of the column is 8 feet. For second column, the first step is 2.5 feet and the second step is 18 inches and the third step is 13 ½ inches. The height of the second column is 7 feet and 6 inches. We will use the mortar in 1:6 where 1 is the cement and 6 is the sand in the first column. 13 and ½ inches brick masonry is used in 1st column. 9 inches brick masonry wall is in second column.  For the column with foundation 3 feet, we will use the plaster ratio as 1:4 where 1 is cement and 4 is sand.

Deep struck pointing is for column having foundation equal to 2.5 feet. For column with foundation equal to 3 feet, there is ¾’’ Groove in plaster at D.P.C. level.

Watch the following video for more details.

Video Source: Sami Ullah Stanikzai

source