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.)

>

>

>

>

>

>