. /.   WORLD TRADE  
ORGANIZATION  G/TBT/N/TTO/73 
23 June 2009  
 (09-3073) 
Committee on Technical Barriers to Trade Original:   English 
  
 
NOTIFICATION 
 
The following notification is being circ ulated in accordance with Article 10.6 
 
1. Member to Agreement notifying:  TRINIDAD AND TOBAGO
  
If applicable, name of local governme nt involved (Article 3.2 and 7.2):     
2. Agency responsible:  Trinidad and Tobago Bureau of Standards 
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 :    
3. Notified under Article 2.9.2 [ X ], 2.10.1 [   ], 5.6.2 [   ], 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):  Standard specification for 
loadbearing concrete maso nry units (ICS 91.100.030).  
5. Title, number of pages and language(s) of the notified document:  Standard specification 
for loadbearing concrete masonry units (9 pages, in English).  
6. Description of content:  This specification covers hollow and solid concrete masonry units 
made from hydraulic cement, water and mineral ag gregates with or wit hout the inclusion of 
other materials. There are three classes of concrete masonry units: normal weight, medium 
weight and light weight. Thes e units are suitable for both loadbearing and non-loadbearing 
applications. Concrete masonry units covered by this  specification are made from lightweight 
or normal weight a ggregates, or both. 
7. Objective and rationale, including the na ture of urgent problems where applicable:  
Compulsory status has been recommended in or der to protect the consumer or user against 
danger to health or sa fety by ensuring a produc t of acceptable quality.  G/TBT/N/TTO/73 
Page 2  
 
  8. Relevant documents:    
C33 – Specification for Concrete Aggregates 
C140- Test Method for Sampling and Testing Concrete Masonry Unit s and related Units 
C331-Specification for Light Weight Ag gregates for Concrete Masonry Units 
C423 – Test Method for Linear Drying Shrinking of Concrete Masonry Units 
C595 – Specification for Bl ended Hydraulic Cements 
C618 – Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in 
Concrete C989 – Specification for Ground Granulated Blas t-Furnace Slag for Use in Concrete and 
Mortars 
C1157-Performance Specification for Hydraulic Cement. 
C1209 – Terminology for Compressiv e Strength of Masonry Prisms 
E519 – Test Method for Diagonal Tens ion (Shear) in Masonry Assemblages 
E72 – Test Methods of Conducting Strength Tests of Panels for Building Construction. 
9. Proposed date of adoption:   
Proposed date of entry into force:   }On a date to be notified by the Minister to 
whom responsibility for trade and industry is assigned, in a Notice to be published in the 
Trinidad and Tobago Gaze tte as required by the 
Standards Act. 
10. Final date for comments:  19 June 2009 
11. Text available from: National enquiry po int [ X], or address, telephone and fax 
numbers, e-mail and web-site addres ses, if available of the other body:    
Trinidad and Tobago Bureau of Standards                                                                                       
1-2 Century Drive, Trincity I ndustrial Estate, Macoya, Tunapuna 
Trinidad and Tobago                                                    Email Address:  ttbs@ttbs.org.tt