Originally Posted by
robpage
The wrought iron is one of the roughest toughest materials known that's why you make crane hooks railway couplings and things like that out of it the difference is when you belt it in with a pneumatic hammer or you put it in with two men and big hammers . The problem is the shear force when you got a rivet holding two pieces of metal together and you pull the two pieces of metal horizontally apart the rivet needs to stop the metal and needs to stay whole because of the iron rivet is I'd to be hammered in by pneumatic riveting gun being put in by hand it gave it a lesser shear strength . When you allow for the embrittlement in the steel plate which is considerably worse below 32 degrees F and I believe the sea temperature that night just prior to the collision with somewhere around 29 degrees F then once you start Buckling plates where you would have a microscopic crack the whole thing was start a running track which in the case of a rivet hold it would open up with a star like pattern of cracks about the Rivet . . So you can blame not substandard rivets but the wrong rivet for the method of application or more substantially you can blame the poor quality of the steel plate but we are comparing this to modern production methods of Steel and modern metallurgical practices over 100 years ago you got a fairly good product but nothing like the quality you would get today
When it comes to the bullocks about the purple in the braids there are photographic evidence of marine engineers having purple backing to the braid as far back as the 1880s . This was originally started in the Royal Navy I believe who eventually discontinued it with the exception of the red for the doctor's so there is absolutely no relationship whatsoever between a colour of Engineering braids and the Titanic and the number of engineers that I've heard have some Cock and Bull Story about the engineers or impermanent morning for the men that lost the Titanic etc it's all totally rubbish . I believe it's actually there so people are warned that we are highly sensitive delicate people who have wonderfully fragrance sense of humour and a big squishy in the control room that says switch this over to resume engine room control just in case
The other Myth on braids that I've heard all kind of stories about is the fact that Union Castle lost so many ships that they were awarded RN style braids I don't know where that one came from but there's another fairy story the braids with the curl was clan line company livery
I have read quite a lot on the failure of the Titanic the biggest contributory Factor was it was designed to hit it head on not drag it along the side but nobody actually steering knew that and if they had would they have had time to make the right decision . Other designer forgot to take the watertight bulkheads up to the main deck which were the advantage of hindsight was absolutely bloody stupid. Everything we know that UC springing up always comes with the accompanying TV documentary and possibly a book