G/TBT/N/CHL/431  
5 January  2018 
(18-0083) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  Spanish  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6.  
 
1. Notifying Member : CHILE 
If applicable, name of local government involved (Articles 3.2 and 7.2):   
2. Agency responsible : Ministerio de Vivienda y Urbanismo  (Ministry of Housing and Urban 
Development)  
Name and address (including telephone and fax numbers, email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:  
Ministerio de Relaciones Exteriores - Dirección General de Relaciones Económicas 
Internacionales (Ministry of Foreign Affairs, Directorate -General of International Economic 
Relations)  
3. Notified under Article 2.9.2 [X], 2.10.1 [ ], 5.6.2 [X], 5.7.1 [ ], other:  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading . ICS numbers may be provided in addition, where applicable) : Ventilation 
ducts  
5. Title, number of pages and language(s) of the notified document : Norma Chilena 
NCh935/4:2016 Prevención de incendio en edificios - Ensayo de resistencia al fuego – 
Parte 4: Conductos de ventilación (Chilean Standard (NCh) No. 935/4:2016 Fire prevention 
in buildings - Fire resistance test - Part 4 : Ventilation ducts), (42 pages, in Spanish)  
6. Description of content : The notified Standard establishes the test conditions and criteria 
to assess the fire resistance of horizontal and vertical ventilation du cts under standard fire 
conditions.  The test assesses the behaviour of ducts when they are exposed to fire from 
the exterior (duct A) and when fire reaches the interior (duct B) . This Standard applies to 
vertical or horizontal, rigid or flexible ventilatio n ducts, including their support system s and 
access doors, which are installed in, or which enter the interior of a building, and the entire 
surface of which is exposed to fire . Annex C contains a general guide regarding this 
Standard and information on which the development of this method is based . This 
Standard does not apply to : (a) Ducts of which the fire resistance depends on the fire 
resistance of a ceiling ; (b) Ducts containing fire dampers installed in cavities in 
fire-resistant walls ; (c) Inspect ion access doors, unless they are part of the ducts to be 
tested ; (d) Ducts comprising only two or three sides ; (e) Fittings of fixtures attached to 
floors and walls ; (f) Smoke extraction ducts . For such ducts, Chilean Standard (NCh) 
No. 935/5 applies.  
7. Objective and rationale, including the nature of urgent problems where 
applicable : Safety requirements  
8. Relevant documents : Decreto Supremo N° 47 de 1992 (Ordenanza General de 
Urbanismo y Construcciones)  (Supreme Decree No. 47 of 1992 (General Ordinance on 
Urban Planning and Construction))  G/TBT/N/CHL/431  
- 2 - 
  9. Proposed date of adoption : - 
Proposed date of entry into force : - 
10. Final date for comments : 60 days from the date of notification.  
11. Texts available from : National enquiry point [ ] or address, telephone and fax 
numbers and email and website addresses, if available, of other body:  
Dirección General de Relaciones Económicas Internacionales  (Directorate -General of 
International Economic Relations)  
Ministerio de  Relaciones Exteriores  (Ministry of Foreign Affairs)  
Teatinos 180, piso 11  
Tel.: (+56)- 2- 2827 5491  
Fax: (+56)-2 -2380 9494  
Email: mailto: tbt_chile@direcon.gob.cl  
Chilean Standard available online at: https://www.inncoleccion.cl/  
Company : DIRECON -017 
Username : direcon  
Password : direcon  
Email: tbt_chile@direcon.gob.cl