Kelvedon

[drew_douglasuk]

No, that was more to do with the stability of the flint construction 
of the tower. The concrete stuck to the beam ends just fine, just not 
the tower! Further concreting has been done but apparetly as it was 
poured in at the top it ran down and out of the bottom. 

Andrew




--- In bellhistorians at yahoogroups.com, "davidhird_uk" 
<davidhird_uk at ...> wrote:
>
> Is this problem anything like the one at Kelveden in Essex?
> 
> David
> 
> --- In bellhistorians at yahoogroups.com, "Bickerton, Roderic K 
> \(SELEX\) \(UK\)" <roderic.bickerton@> wrote:
> >
> > 
> > Surly if a grillage of sufficient strength, with a reasonable 
> design
> > margin, which probably requires  a factor of 5:1. 
> > The  frame design and layout can only change the stresses over a 
> small
> > range, nothing like enough to seriously eat into a proper grillage
> > design margin.
> > 
> > How can frame design, or anything else the Bellhanger dose, for 
> that
> > matter be a problem if the grillage is correct? 
> > 
> > I have done a bit of calculation around bolts and cannon straps. 
> The
> > design margin on these is typically 10:1 or more. I would be 
> surprised
> > if frame yield margins are less, as rigidly rather than 
structural 
> yield
> > 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 
> that
> > 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 
> in
> > 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 
> a
> > material that pre dates structural steel!
> > 
> > Similar appears to have been done to the method of anchoring 
> structural
> > steel to concrete, also the subject of much research.
> > 
> > I am glad these guys do not design aircraft!
> > 
> > 
> > 
> > 
> > SELEX Sensors and Airborne Systems Limited
> > Registered Office: Sigma House, Christopher Martin Road, 
Basildon, 
> Essex SS14 3EL
> > A company registered in England & Wales.  Company no. 02426132
> > 
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