Hi Tony not surprising, i just wander still what is the effect of the
falling to the ground carbon from pantographs is having on us? Isn't the
particle size to big to clog lungs? Peter
On Monday 26 February 2024 at 15:03:12 UTC+11 TP wrote:
> In that media piece, the fully enclosed metro stations were rated the
> least affected by fallout - understandably. The only opportunity to be
> subject to train fallout would be the period the gates are open and that's
> a very tight gap.
>
> Tony P
>
> On Monday 26 February 2024 at 13:54:00 UTC+11peterm...@... wrote:
>
>> Matthew,
>>
>> I agree its a dust and dirt trap, the major drivers will be "aesthetics"
>> no 1 and no 2 acoustics, the latter gaps and openings to cavities behind
>> that are damped are very common control of acoustic behaviour of a space,
>> but having dealt with problems down the track the pull the acoustic traps
>> apart and cleaned the dust and crap out of them is not well received by
>> facility owners. The acoustic traps collect junk dust and everything that
>> goes by.. They diminish in performance the more clogged with crap they are
>> and eventually need a clean. Messy process in deed as you have indicated.
>>
>> This arrangement should prevent the carbon " dust" in the platform that
>> has been reported recently in Metro and ST underground, carbon gosh i
>> wonder where, oh yeh pantographs!!! look at 2107 Matthew we know it only
>> too well.....
>>
>> Thanks
>> Peter
>> On Sunday 25 February 2024 at 19:02:31 UTC+11 Matthew Geier wrote:
>>
>>>
>>> On 25/2/24 18:19, TP wrote:
>>>
>>> There are no horizontal covers over the running tracks. I know the
>>> design you mean, but these (and afaik on all Sydney metro stations that
>>> have full height PSDs) are vertical walls. There should be very little dust
>>> fallout in these public areas. The platforms are completely screened from
>>> the trains, so there would be little infiltration of train brake,
>>> pantograph etc fallout. They must have some confidence in that, otherwise
>>> they wouldn't have all those white walls and ceilings throughout the
>>> station!
>>>
>>>
>>> I was there, there ARE near horizontal covers over the running lines,
>>> the design will be difficult to clean. It won't get dirt from the trains,
>>> but people are pretty dirty too. Probably more so than the mechanical
>>> interactions of the train with their infrastructure. See attached photo I
>>> took this morning at the 'Community Day'.
>>>
>>> The brown part is over the tracks (I think there are air conditioning
>>> ducts between the running tunnel and the top of this structure) and it will
>>> be a trap for dust and debris. There are slats running length-ways with
>>> what looks like black painted board under the lengthwise slats. Any loose
>>> paper or lolly wrappers that end up there will stay up there. There are
>>> also places where people could toss stuff onto them from the concourse. But
>>> with the height above the platform below, any one going to clean them is
>>> going to have to have fall restraint - but there is no obvious attachment
>>> points for their harness. So I guess it won't get cleaned until it gets
>>> disgusting and they bring a EWP down the lifts one close down weekend and
>>> clean it.
>>>
>>> The station design is a dirt trap. Otherwise appears to be well designed
>>> station to move people in and out. Lots of escalators and lifts. Wide
>>> passages.
>>>
>>> But they seem to have missed easy to clean and easy to maintain.
>>>
>>> The areas you can't see are probably larger than the public spaces, the
>>> station also contains at 11kv substation, LV switch rooms and a traction
>>> supply substation - and a significant amount of 'air handling' equipment.
>>>
>>>
>>> There are also not enough seats, but since the maximum you would be
>>> waiting is 10 minutes I'll give em that one.
>>>
>>> The former ECRL stations have open topped running lines - at North Ryde
>>> where my sister lives, you can look down onto the roofs of the passing
>>> trains. (And if so inclined throw things at them.)
>>>
>>>
>>>
>>>
>>>
>>>