Is there a purpose to 3 (yes 3) check/supplementary fittings?

Reference to a withdrawn or obsolete or indeed rewritten code may not invalidate the content of the document you have been using for 20 years.
TG17:10 also makes reference to BS1139 when talking about the longevity of couplers.
The earlier reference to TG14:03 related the use of Supplementary couplers. TG17:10 is the “Guidance” of fitting recognition and gives no such guidance as to fitting use.
If there is a later revision or issue of TG14 I would appreciate a copy.
Whilst the content of the tower would appear on the surface to be excessive I would prefer to see either the design brief or design drawing / calcs before commenting on its suitability. As demonstrated in an earlier post it is possible from the information provided on the load to be supported to attain the results obtained.
regards Alan
 
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