G/TBT/N/TTO/117  
 
13 March 2018  
(18-1517) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member: TRINIDAD AND TOBAGO   
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:  
Trinidad and Tobago Bureau of Standards  
1-2 Century Drive Trincity Industrial Estate  
Macoya, Tunapuna  
Tel: 868 -645-6222  
Fax: 868 -663-4335  
Email: ttbs@ttbs.org.tt   
Website: www.ttbs.org.tt  
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 indi cated 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): Profiled 
steel sheets for roofing and siding applications  
Flat steel products and semi -products (ICS 77.140.50).  
5. Title, number of pages an d language(s) of the notified document: Profiled steel 
sheets for roofing and siding applications - Specification (30 page(s), in English)    
6. Description of content: This standard specifies minimum requirements for metallic -
coated steel sheets profiled for roofing and siding applications. It includes requirements 
for: 
1. plain sheet characteristics including base metal thickness, tensile strength and 
yield strength;  
2. metallic coating characteristics including coating type and coating mass;  
3. paint coating characteristics including resistance to colour change and chalking;  
4. profiled sheet dimensional characteristics including length, squareness, and 
tolerances;  
5. labelling; and  
6. compliance (see Annex A).  
This standard applies to unpainted and pre -painted profiled steel sheets of minimum base 
metal thickness of 0.36 mm hot -dip coated with zinc and aluminium -zinc or aluminium -
zinc-magnesium alloy.  
This standard does not apply to other construction products made by the cold forming of 
steel sheets su ch as furring channels and load bearing products including floor decking 
sheets and purlins.    G/TBT/N/TTO/117  
 
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  7. Objective and rationale, including the nature of urgent problems where 
applicable: Prevention of deceptive practices and consumer protection; Protection of 
human health or safety; Quality requirements  
8. Relevant documents:   
The following are the normative references:  
ASTM International  
ASTM A370,  Test Methods and Definitions for Mechanical Testing of Steel Products  
ASTM D522, Test Methods for Mandrel Bend T est of Attached Organic Coatings   
ASTM D1005, Standard Test Method for Measurement of Dry Film Thickness of Organic 
Coatings using Micrometers  
ASTM D4214, Standard Test Method for Evaluating the Degree of Chalking of Exterior Paint 
Films 
ASTM G 154, Standard Practice for Operating Flurorescent Ultraviolet (UV ) Lamp Apparatus 
for Exposure of Nonmetallic Materials  
ASTM A90/A90 M, Standard Test Method for Weight (Mass) of Coating on Iron and Steel 
Articles with Zinc or Zinc -Alloy Coatings  
International O rganisation for Standardisation  
ISO 2859 -1, Sampling procedures for inspection by attributes – Part 1: Sampling schemes 
indexed by acceptance quality limit (AQL) for lot -by-lot inspection  
ISO 9227, Corrosion tests in artificial atmospheres – Salt spray tests 
ISO 4628 -6, Paints and Varnishes – Evaluation of degradation of coatings – Designation of 
quanity and size defects and of intensity of uniform changes in appearance – Part 6: 
Assessment of degree of chalking by tape method  
Standards Australia  
AS/NZS 1580.481.1.11, Paints and related materials – Methods of test. Method 481.1.11 : 
Coatings  - Exposed to weathering – Degree of chalking   
9. Proposed date of adoption:  To be determined  
Proposed date of entry into force:  To be determined  
10. Final date for comments: 14 May 2018  
11. Texts available from: National enquiry point [X] or address, telephone and fax 
numbers and email and website addresses, if available, of other body:   
Trinidad and Tobago Bureau of Standards website  
1-2 Century Drive, Trincity Industrial Estate  
Macoya, Tunapuna  
Tel: 868 -645-6222 
Fax: 868 -663-4335 
email: ttbs@ttbs.org.tt   
website: www.ttbs.org.tt  
http://kalipa.gottbs.com/embed_gen/index.php?doc=2018 -03-01-
57667TTS%2069%20public%20comment%20draft -%202018 -02-27.pdf