Foreword

TCVN 6003-2:2012 replaces TCVN 5897:1995.

TCVN 6003-2:2012 is identical to ISO 4157-2:1998.

The TCVN 6003 series under the general title “Construction drawings – Designation systems” consists of the following parts:

• TCVN 6003-1:2012, Part 1: Buildings and parts of buildings
• TCVN 6003-2:2012, Part 2: Room names and room numbers

The ISO 4157 series “Construction drawings – Designation systems” also includes the following part:

• ISO 4157-3:1998, Construction drawings – Designation systems – Part 3: Room identifiers

TCVN 6003-2:2012 was prepared by the Institute of Architecture, Urban and Rural Planning, proposed by the Ministry of Construction, appraised by the Directorate for Standards, Metrology and Quality, and promulgated by the Ministry of Science and Technology.

1. Scope

This standard specifies requirements for a designation system for rooms, courtyards, spaces and voids in buildings using room names and room numbers. These requirements are intended for identifying rooms in buildings throughout their service life.

The requirements aim to identify the rooms of a project over its entire life cycle, from conception, planning, design, construction, maintenance, renovation through to demolition (see ISO 4157-3).

2. Normative references

The following referenced documents are indispensable for the application of this standard. For dated references, only the cited edition applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

TCVN 6003-1:2012¹), Construction drawings – Designation systems – Part 1: Buildings and parts of buildings.

ISO 4157-3:1998, Construction drawings – Designation systems – Part 3: Room identifiers.

3. Terms and definitions

This standard uses the terms and definitions given in TCVN 6003-1:2012.

4. Principles for room numbering

4.1. Logical sequence

Room numbers shall be assigned to all rooms on each floor in a logical sequence, preferably in a continuous order, starting with number n01 (n = floor number) throughout all parts of the building. This includes not only spaces enclosed by walls but also external or covered spaces in accordance with the room numbering system, e.g. enclosed garden areas, pools, garages, roofed loggias and other intermediate areas.

4.2. Separate buildings

If there are several buildings in the same construction project, the rooms shall be numbered separately for each building in accordance with 4.1. Separate buildings may be adjacent to each other or may be connected by doors or passageways.

4.3. Representation on drawings

4.3.1. General

Room numbers and names according to the room function shall be shown for each room on the relevant drawings (see Figure 1).

Figure 1 – Example of room names and numbers on a third floor

Room numbers and names shall be clearly underlined on drawings.

In the actual building, the designation (see Figure 1) shall be clearly marked above the door or passageway to the respective room, but not underlined. This does not apply in the opposite direction, e.g. from office to corridor.

4.3.2. Small rooms

For small rooms, only the room number should be shown on the drawing (see Figure 2).

Figure 2 – Example of a small room without room name designation

However, the names of small rooms shall still be listed in a legend on the relevant drawing to clearly indicate the room function, with the exception of symbols such as WC, sink, coat rack, etc.

4.4. Rules for room numbering

4.4.1. Room numbers

Room numbers shall consist of 2 digits following the digit indicating the floor number in the building. The 2-digit number shall be a continuous number for each room on that floor:

EXAMPLE:

Floor 1: room numbers 101-199;
Floor 2: room numbers 201-299;
Floor 3: room numbers 301-399;
…
Floor 17: room numbers 1701-1799;
…

Room numbers with 2, 4 or 5 digits shall only be used in extremely small or large buildings, in which case the number zero (0) shall definitely not be used. When room numbers with 2 or 4 digits have been chosen, all rooms in the building shall have the same number of digits, except for floors with floor numbers greater than 9.

EXAMPLE:

Floor 1: room numbers 11-19 or 1001-1999;
Floor 2: room numbers 21-29 or 2001-2999;
Floor 3: room numbers 31-39 or 3001-3999;
…
Floor 17: room numbers 171-179 or 17001-17999;
…

4.4.2. “Room 0” rule

The number 0 shall not be assigned to any rooms on any floor, i.e. numbers such as 20, 300, 4000 shall not be used for room numbering. These room numbers are reserved for spaces outside the building. “ROOM 0” shall refer to the entire space outside.

EXAMPLE 1:

“Room 300” means the outdoor space of floor 3.

EXAMPLE 2:

The wall between 300 and 317 is the exterior wall of room 317, similarly the wall between 317 and 319 is an interior wall between rooms 317 and 319.

4.4.3. Rule according to the alphabet

For rooms designated by 4 digits, there shall be no spaces or dots between the digits.

Rooms on the ground floor, mezzanine, basement, underground floors, etc. may be designated corresponding to the floor designation, such as: G01, M02, B03, U04.

EXAMPLE:

Ground floor (G): room numbers G01-G99;
Basement (B): room numbers B01-B99.

4.5. Numbering sequence

4.5.1. Numbering direction

Room numbering on each floor shall be carried out in a convenient direction throughout the building. This may be clockwise, in the order of rooms from the main entrance, or in another logically chosen direction.

In buildings such as hotels, or in countries where numbering is customary, rooms may be numbered in ascending order in a zigzag pattern on both sides of the corridor.

4.5.2. Omitting room numbers

Room numbers may be omitted if permitted without following a logical continuous sequence, e.g. rooms in three wings leading from an elevator may be numbered 401-426, 431-452 and 461-474, omitting several room numbers as a clear intention or for later numbering.

4.5.3. Stairwells

Depending on the specific case, stairs, elevator shafts, etc. may be numbered according to the room numbers on that floor.

EXAMPLE:

Floor 1: staircase 112 or elevator 113
Floor 2: staircase 212 or elevator 213
Floor 3: staircase 312 or elevator 313
…
Floor 17: staircase 1712 or elevator 1713
…

4.6. Small rooms and spaces

Small rooms such as toilets shall also be given room numbers. Small spaces such as closets may use the number of the room in which they are located followed by a lowercase letter (see Figure 3).

Figure 3 – Example of a room with an additional clothes closet

4.7. Added rooms

If a new room is added during the design process when other rooms already have numbers, this new room shall be numbered following the sequence on that floor without considering the geometric order or numbering sequence. To avoid confusion, renumbering all rooms in the entire building may be considered.

4.8. Combining rooms

There may be gaps in the sequential room numbering. If rooms are combined into one room, the new room shall take the lowest room number.

EXAMPLE: Rooms 127, 128 and 134 are combined into room 127. Thus, there will no longer be rooms numbered 128 and 134, creating a gap in the room numbering.

4.9. Merging rooms

If 3 or more rooms are converted into 2 or more rooms, the lowest room number shall be used for the new room. If the door and its designation still exist, the existing room number shall be retained.

4.10. Basement and attic floors

Spaces in the basement and attic floors shall also be numbered in accordance with the provisions of TCVN 6003-1:2012.

TABLE OF CONTENTS

1) TCVN to be issued