[modeleng] Re: Elevated track systems

"Point Rodding"...translation, please.  Is this what
we Yanks call "re-bar"?

Al Messer

--- Dave Beaman <davebeaman@xxxxxxxxxxxxxxxx> wrote:

> I wouldn't recommend using point rodding unless you
> get it free, it is now 
> £140GBP a 4m length, an expensive track. Lucky
> someone in you're group knew 
> where to get it from John, Mr Cotterell? It does
> work well though, I have a 
> 90ft test track at the side of the house made from
> point rodding.
> 
> Dave.
> 
> 
> ----- Original Message ----- 
> From: "John Pagett" <john_pagett@xxxxxxxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Tuesday, September 26, 2006 10:53 PM
> Subject: [modeleng] Re: Elevated track systems
> 
> 
> Harry,
> 
> Well, there are lots of ways of doing it, and I
> don't think that any is
> necessarily "right".
> Our track at Bromsgrove was originally built with
> piers cast in situ onto a
> footing about 3' square. When we extended the track,
> we used a system copied
> from Nottingham and Urmston clubs (possibly others
> too). The piers are
> slightly tapered pillars which stand on a bed of
> road planings (not sure if
> you'd get those in the US, most roads seem to be
> concrete rather than
> tarmac).
> 
> In both cases, we've used point rodding (thick
> channel section, about 1 1/2"
> by 1 1/2", and well galvanised, to support the
> track. Timber battens are
> laid along the point rodding and the sleepers (ties)
> are placed across the
> battens. The point rodding is fixed to each of the
> concrete uprights and
> this is what provides the stiffness for the
> structure. Superelevation can be
> produced by jacking and moving the base of the
> pillar away from the centre
> of the curve.
> 
> There are no concrete sections between the pillars.
> Pillars are nominally 6'
> apart (from memory), it's certainly not less except
> where fixed objects
> (swing out section, for example), are encountered.
> 
> Other systems include all concrete (pillar and span)
> and also an all steel
> solution with steel tube used at the pillars with
> suitable bridging
> sections. I can't really comment on these as I
> haven't so much experience of
> them. The all steel system tends to have no room for
> adjustment and
> therefore needs to be got right first time.
> 
> Cheers,
> 
> JohnP
> ----- Original Message ----- 
> From: "Harry Wade" <hww@xxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Tuesday, September 26, 2006 10:30 PM
> Subject: [modeleng] Elevated track systems
> 
> 
>        I have question for the British contingent
> about elevated track
> structures.        What's been the most popular pier
> design?  Built-up
> piers or imbedded posts?  When erecting masonry or
> concrete support piers,
> what if anything is done to provide a base or
> footing?  Is a poured or laid
> footing laid first and the piers erected on these,
> or do the piers tend to
> rely upon their own footprint for support?  No doubt
> the answer to the
> first varies with location and substrate.
>       What is a typical length of say a concrete
> span?  Do builders tend to
> pour these in place or pour them on the ground and
> then lift them into
> place?  Any information would be welcomed.
> 
> 
> Regards,
> Harry Wade
> Nashville  Tennessee
> 
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