Decimal Sheet Numbering for Civil Drawings

Sheet Numbering Concept

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

Division	Description	Remarks
C00	Civil coversheets and general notes	Project Title, General Notes, Drawing Schedule
C01	Site, existing conditions, demolition, landscaping etc.	Overall plans
C02	Site grading and horizontal control	Plans
C03	Site drainage and Utilities	Plans
C04	Site earthworks and excavation	Plans
C05	Earthwork profiles
C06	Road profiles
C07	Stormwater profiles
C08	Sanitary profiles
C09	Water-hydraulic profiles
C10	Other profiles
C11	Site Structures	Details
C12	Site utilities	Details
C13	Flow diagrams
C14	Site electrical conduit layouts

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
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”.
A decimal separator is used because it commonly means a “division of a whole”.

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

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.