G/TBT/N/CHL/434  
8 January  2018 
(18-0137) 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) : Smoke 
extraction ducts  
5. Title, number of pages and language(s) of the notified document : Norma Chilena 
NCh935/5:2016 Ensayo de resistencia al fuego - Parte 5 : Conductos para extracción de 
humos  (Chilean Standard (NCh) 935/5:2016 Fire resistance test - Part 5 : Smoke 
extraction ducts) (31 pages, in Spanish)  
6. Description of content : The notified Standard establishes the test conditions and criteria 
to assess the fire resistance of smoke extraction ducts in the event of a fire . It applies only 
to smoke extraction ducts t hat pass through a flammable cavity inside a building . This test 
method only applies to fire -resistant ducts that have been tested in accordance with 
Chilean Standard (NCh) No. 935/4 (ducts A and B) . For ducts A , it is required that the test 
be carried out  by increasing the standard pressure of 300 Pa, indicated in Chilean Standard 
(NCh) No. 935/4, 10.2.1, to 500 Pa . For the purpose of the test described in this Standard, 
smoke extraction ducts are referred to as ducts C . This test has been designed to cover 
both vertical and horizontal smoke extraction ducts . However, if both the horizontal and 
vertical tests are carried out in accordance with Chilean Standard (NCh) 935/4 on the duct 
system in question, it is not necessary to assess the vertical system using this Standard, 
provided that it has been tested in a horizontal position for this Standard . However, if in 
practice, the system is only used vertically in smoke extraction systems, it is necessary to 
test it in a vertical position for this Standard . This Standard only applies to four -sided 
ducts . It does not cover one -, two- or three -sided ducts.  
7. Objective and rationale, including the nature of urgent problems where 
applicable : Safety requirements  G/TBT/N/CHL/434  
- 2 - 
  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))  
9. Proposed date of adoption : - 
Proposed date of entry into force : - 
10. Final date for comme nts: 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