. /.   WORLD TRADE  
ORGANIZATION  G/TBT/N/TTO/75 
30 July 2009  
 (09-3703) 
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 
Deformed and Plain Carbon-S teel Bars for Conc rete Reinforcemen t  (ICS 77.140.80) 
5. Title, number of pages and language(s) of the notified document:  Standard Specification 
for Deformed and Plain Carbon-St eel Bars for Concrete Reinfor cement (13 pages, English).  
6. Description of content:   
1.1 This specification covers deformed and plai n carbon-steel bars for concrete reinforcement 
in cut lengths and coils. Steel bars containing alloy additions, such as with the American Iron 
and Steel Institute and the Society of Automotive Engineers series of alloy steels, are permitted if the resulting product meets all the other requirements of this specification. The 
standard sizes and dimensions of deformed ba rs and their number de signations are given in 
Table 1. The text of this specification re ferences notes and footnotes which provide 
explanatory material. These no tes and footnotes (excluding t hose in tables) shall not be 
considered as requirement s of the specification.  
1.2 Bars are of three minimum yield strengt h levels: namely, 40 000 [280 MPa], 60 000 [420 
MPa], and 75 000 psi [520 MPa], designated as Grade 40 [280], Grade 60 [420], and Grade 75 [520], respectively.  
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 th is specification in Gr ade 40 [280], Grade 60 
[420], and Grade 75 [520]. For ductility prope rties (elongation and be nding), test provisions 
of the nearest smaller nominal diameter defo rmed bar size shall apply. Requirements 
providing for deformations and mark ing shall not be applicable.  
Note 1—Welding of the material in this spec ification should be approached with caution 
since no specific provisions have been included to enhance its weldability. When steel is to be 
welded, a welding procedure suitable for th e chemical composition and intended use or 
service should be used. The use of the latest edition of AWS D 1.4/D 1.4M is recommended.  G/TBT/N/TTO/75 
Page 2  
 
  This document describes the proper selection of the filler metals and preheat/interpass 
temperatures, as well as performance an d procedure qualifica tion requirements.  
1.4 This specification is applicable for orders  in either inch-pound un its (as Specification A 
615) or in SI units (as Specification A 615M). 
1.5 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 the specification. 
1.6 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 applicability  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 A615/A615M-08b Standard Specification for Deformed and 
Plain Carbon-Steel 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