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CD Sheet Index

From General to Specific – Discipline Prefix to Sheet Number

A surprise. The CSI Uniform Drawing System orders sheets differently than the AIA ConDoc system, following more strictly in the order in which a structure is constructed.

Quoting from the AIA white paper:

Guiding principles include the following:

  1. Segregating information by discipline (both design and construction) to form subsets of the total drawing package
  2. Ordering the subsets to correspond to the natural sequence of construction, closely associating disciplines where topics are similar
  3. Collecting and presenting each drawing (plan, elevation, section) on a sheet dedicated to that drawing type (though different drawing types may be combined for small projects)
  4. Presenting information within each subset from general to specific

Discipline PREFIX

Architects are used to seeing their stuff come first, but ordering the set by the “natural sequence of construction” is rational.

PrefixDiscipline
GGeneral
HHazardous Materials
VSurvey/Mapping
BGeotechnical
WCivil Works
CCivil
LLandscape
SStructural
AArchitectural
IInteriors
EEquipment
FFire Protection
PPlumbing
DProcess
MMechanical
EElectrical
TTelecommunications
RResource
XOther Disciplines
ZContractor/Shop Drawings
OOperations

Sheet TYPE

Within each discipline, sheets are always grouped by type.

PrefaceDescriptionUsage Notes
000Generalproject data
symbols
key notes
general notes
100Plansbuilding plans: minimum 1/4" scale
site plans come under the L series sheets
200Elevationsexterior building elevations
1/4" minimum scale
1/2" for tricky areas
300Sections, Wall Sections1/4" min
1/2" preferred
3/4" for wall sections min
400Scaled-up plans, Sections, or Elevations3/4"
500Details1 1/2" details
3" details
600Schedules and Diagrams
700User-definedtypical detail sheets
800User-definedtypes that do not fall into other categories
9003D representations3D representations
isometrics
photographs

Sheet NUMBERING

Sheets numbers are built from five components:

Discipline – Type – Sequence – Sequence Designator (optional) – Supplemental Designator (optional)

Which in general produces numbers that look something like:

A-102-01-R1

Discipline

Per the CSI table above

Type

Per the Sheet Types in the table above

Sequence

Easy stuff – just a number. The sequence starts with 01 (not 00) and proceeds to 99. Such as:

A-102

Suffix

For sheets added after a numbering sequence has been established, Suffixes can be used. Such as:

A-102-01

Supplemental

Designators indicate revised sheets. “R” indicates a partial revision. “X” indicates a totally revised sheet. Such as:

A-102-X1