[Bell Historians] King's Lynn

davidhird_uk davidhird_uk at K6B06EhwMtFYzBTgStCgP5wjO_uhWA-nZ9DcqHrnyD1NUrSoEYMjQ-eIIFFKZTUpkdqYMua38ngRWmvf_v7NH1oe2g.yahoo.invalid
Wed Jul 4 17:22:24 BST 2007

Is this problem anything like the one at Kelveden in Essex?


--- In bellhistorians at yahoogroups.com, "Bickerton, Roderic K 
\(SELEX\) \(UK\)" <roderic.bickerton at ...> wrote:
> Surly if a grillage of sufficient strength, with a reasonable 
> margin, which probably requires  a factor of 5:1. 
> The  frame design and layout can only change the stresses over a 
> range, nothing like enough to seriously eat into a proper grillage
> design margin.
> How can frame design, or anything else the Bellhanger dose, for 
> matter be a problem if the grillage is correct? 
> I have done a bit of calculation around bolts and cannon straps. 
> design margin on these is typically 10:1 or more. I would be 
> if frame yield margins are less, as rigidly rather than structural 
> strength govern design.
> The real disaster is that the fail indicates no margin and 
possibly a
> significant negative.
> That required the grillage securing not just to be improved, but 
to be
> at the very least 5 times stronger.
> I bet that will be difficult!
> If I remember advice was taken on the steelwork dimensions, I hope 
> is correct?
> What really is inexcusable is that modern concretes can be made 
with a
> verity of additives, fills and reinforcements giving accurate
> chrematistics which can be varied to produce an ideal performance 
> almost any situation.
> Hardness, strength, flexibility, permeability, adhesion and other
> characteristics can be varied over a wide range.
> It has taken 100 years of scientific development to reach this 
level of
> technical competence.
> At whim some "responsible" person can just ignore this and specify 
> material that pre dates structural steel!
> Similar appears to have been done to the method of anchoring 
> steel to concrete, also the subject of much research.
> I am glad these guys do not design aircraft!
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