Layout of a drawing sheet
Every drawing sheet is to follow a particular layout. As a standard practice sufficient margins are to be provided on all sides of the drawingsheet. The drawing sheet should have drawing space and title page. A typical layout of a drawing sheet is shown in the figure below:

Figure 1. A typical layout of a drawing sheet.

Borders – A minimum of 10 mm space left all around in between the trimmed edges of the sheet.
Filing margin – Minimum 20 mm space left on the left hand side with border included. This provided for taking perforations .
Grid reference system – This is provided on all sizes of industrial drawing sheets for easy location of drawing within the frame. The length and the width of the frames are divided into even number of divisions and labeled using numerals or capital letters. Number of divisions for a particular sheet depends on complexity of the drawing. The grids along the horizontal edges are labeled in numerals where as grids along vertical edges are labeled using capital letters. The length of each grids can be between 25 mm and 75 mm. Numbering and lettering start from the corner of the sheet opposite to the title box and are repeated on the opposite sides. they are written upright. Repetition of letters or numbers like AA, BB, etc., if they exceed that of the alphabets. For first year engineering students grid references need not be followed.
Title box – An important feature on every drawing sheet. This is located at the bottom right hand corner of every sheet and provides the technical and administrative details of the drawing. The title box is divided into two zones

Identification zone : In this zone the details like the identification number or part number, Title of the drawing, legal owner of the drawing, etc. are to be mentioned.
Additional information zone : Here indicative items lime symbols indicting the system of projection, scale used, etc., the technical items lime method of surface texture, tolerances, etc., and other administrative items are to be mentioned.