. /.   WORLD TRADE  
ORGANIZATION  G/TBT/N/TTO/74 
30 July 2009  
 (09-3701) 
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 
Low-Alloy Steel Deformed And Plain Bars Fo r Concrete Reinforcement  (ICS 77.140.80) 
5. Title, number of pages and language(s) of the notified document:  Standard Specification 
For Low-Alloy Steel Deformed And Plain Ba rs For Concrete Reinforcement  13 pages 
English 
6. Description of content:   
1.1 General—This specification co vers deformed and plain low-alloy steel bars in cut lengths 
or coils for concrete reinforcement intended fo r applications where restrictive mechanical 
properties and chemical composition are required for compatibility with controlled tensile property applications or to enhance weldabili ty. The standard size s and dimensions of 
deformed bars and their numbe r designations are given in Ta ble 1. The text of this 
specification references notes and footnotes th at provide explanatory material. These notes 
and footnotes, excluding those in  tables, shall not be consid ered as requirements of this 
specification.  
1.2 Grade—Bars are of a single minimum yield strength level: namely, 60 000 psi [420 MPa], 
designated as Grade 60 [420]. 
1.3 Plain bars, in sizes up to and including 2 ½ in. [63.5 mm] in diameter in coils or cut 
lengths, when ordered, shall be furnished under  this specification. For ductility properties 
(elongation and bending), test provisions of th e nearest smaller nominal diameter deformed 
bar size shall apply.  
1.4 Controlled Tensile Properti es—This specification limits mechanical properties (Table 2) 
to provide the desired yield/tensile propertie s for controlled tensile property applications. G/TBT/N/TTO/74 
Page 2  
 
   1.5 Welding—This specification limits chemic al composition (6.2) and carbon equivalent 
(6.4) to enhance the weldability of the material. When steel is to be welded, a welding procedure suitable for the chemical composition and intended use or service should be used. 
The use of the latest edition of AWS D1.4/D1. 4M is recommended. This document describes 
the proper selection of the filler metals, preheat/interpass temp eratures, as well as, 
performance and procedure qualification re quirements. 
1.6 This specification is applicable for orders  in either inch-pound units (Specification A 706) 
or in SI units [Specification A 706M].  
1.7 The values stated in either inch-pound units or SI units are to be regarded as standard. 
Within the text, the SI units are shown in bracke ts. The values stated in each system are not 
exact equivalents; therefore, each system must be used independently of the other. Combining 
values from the two systems may result in non-conformance with th is specification.  
1.8 This standard does not purport to  address all of the safety concerns, if any, associated with 
its use. It is the responsibility of the user of this standard to establis h appropriate safety and 
health practices and determine the applicabili ty of regulatory limitations prior to use.  
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.  
8. Relevant documents:   ASTM A 706M: 2009 – Standard sp ecification for Low-Alloy Steel 
Deformed and Plain Bars for Concrete Reinforcement   
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:  13 September 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  Industrial Estate, Macoya, Tunapuna, Trinidad and Tobago              
Email Address:  ttbs@ttbs.org.tt