Decimal Sheet Numbering for Civil Drawings


Revision as of 06:01, 6 June 2006; view current revision
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Sheet Numbering Concept

The core concept of this system is to break the drawing sheets into more manageable chunks by isolating elements into groups.

The Divisions

Division Description Remarks
C0 Civil Coversheets Project Title, General Notes, Drawing Schedule
C1 Site/Existing conditions/demolition/landscaping Overall plans
C2 Site grading and horizontal control Plans
C3 Site drainage and Utilities Plans
C4 Site earthworks and excavation Plans
C5 Earthwork profiles
C6 Road profiles  
C7 Stormwater profiles  
C8 Sanitary profiles  
C9 Water-hydraulic profiles  
C10 Other profiles  
C11 Site Structures Details
C12 Site utilities Details
C13 Flow diagrams  
C14 Site electrical conduit layouts  



  1. Small Projects: Plans and details can occupy the same sheet on smaller jobs. In this case use the lowest applicable division for the sheet number. Eg S2.1 = Level 1 slab plan and details
  2. Client Document Numbers: Some times clients what there own document numbers on the drawings. A recommendation for these projects to show thier number in one box titled "document number" and our number in a seperate box nextdoor titled "sheet number".
  3. A decimal separator is used because it commonly means a "division of a whole".

Benefits from a Drafting point of view

  1. Cross referencing errors are reduced due to the relative ease of adding new sheets.
  2. Changes in design are easier to handle due to easier insertion of additional sheets
  3. Drawing sets are more logical as they follow a set menu.

Benefits from a Directors point of view

  1. Cross referencing has always been a major issue when drawing numbers change. This occurs more frequently then it should. Often the problem stems from not allow enough sheets for expansion of the documentation set especially when plans have been sequential numbered. With the decimal sheet numbering system this event is reduced to next to zero. That means less rework of drawings and ultimately a big cost saving for the company.
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