Sample engineering assessment of damage to road bridge after rail tanker fire underneath it.
• important to know what burned and for how long
• Figure 3 shows the mapping of certain damage indicators to the piers near, and span above, the rail tanker.
If this photo is accurate:
• rail bed beside burnt car appears to have sunk 10-15 cm
• some concrete sleepers appear to be missing there
• steel channel without sleepers between the rails is missing
• side of bridge behind men appears to have sagged
Don't know when this video was taken, but while these cranes are on the bridge trying to remove the rail cars (hours? days?) it is doubtful trains can travel on the other tracks.
Especially if the cranes need the tracks during any part of the operation.
Closer video of damage to the structure of the bridge.
Both upper and lower steel maintenance walkways have melted and sagged. This steel failure is an indicator of the heat energy coming from the tanker fires.
Even after the blast, how bad is Russia's security on Crimean Bridge? Even on the rail bridge, someone is openly taking video, then uploading:
• repair progress
• rail and rail bed damage
• which suggest how much heat released
• road bridge damage
Repair progress. At the time of video, of the 7 tank cars that caught fire:
• 2 complete cars remain on rails
• 1 car has tank removed, but frame and bogies remain, still coupled to next car's bogie
• 2 cars have 4 bogies left
• 2 cars fully removed
The heat is so intense that:
• the rail under the wheels collapsed
• the rail car axles warped
Priceless information for fire investigators, civil engineers, metallurgical engineers, bomb damage experts.
Two days ago, @zahed gave an initial assessment from the photos & videos available then. His civil engineering degree gives him a better foundation to understand them than my industrial systems engineering degree. I'm following now for any updates.
@zahed Rail bed damage.
• apparent sinking under 2 remaining tanker cars
• crushed stone between concrete sleepers missing
• suggests damage to underlying box structure
Maybe bridge is too weak to bring back cranes to lift tanks off, and rail too damaged to pull those cars away.
@zahed It seems:
• on one end of the fire, bogies & wheels have fused from the heat and cannot be pulled
• on the other end, the rail bed and underlying structure are too weak to bring back the cranes
This might be why all the people in orange vests are there: looking for solutions.
@zahed This video also show poor state of road bridge:
• intentionally bottlenecked to one lane
• red/white barriers adjacent to remaining rail cars
• no traffic on it - people on foot looking at it
• deflection and slant obvious, matches earlier video released by Russia
@zahed Around 20-second mark of earlier video from a car driving off that damaged section of road bridge, you hear a kerthunk.
This might be normal for such joints, or it may be from a larger deflection due to the explosion destroying the adjacent road span.
This @ConversationUK article released a few hours before the video from atop the rail bridge has 2 engineering professors - experts in bridge safety and blast engineering - assessing the damage revealed at the time. I'm interested in their updates too.
But the City doesn't tell you the $17m/yr is a mortgage payment, of which only the interest portion is operating revenue.
The City lies to you these are all Lease Payments.
On this mortgage, at best the City is getting a breakeven. The City is showing no Interest Income on it.
Let's pretend this is a lease:
• payments starting at $17m/yr
• rising at ridiculously low 1%/yr
• as if CSEC is an affordable housing client needing a rent cap.
CSEC gets ALL the revenues of $1.2b of taxpayer dollars, custom-built, for only $17m/yr.
🧵 Stampede Park Arena aka "future Culture & Entertainment District Event Centre"
City of Calgary's presentation of the financials is deceptive:
• overstating direct benefits to City
• overstating CSEC investment
• understating City investment
• especially from Reserves
Citizens of Calgary do not get a referendum on the deal. In fact, "public consultation" was limited to an announcement on 25 April 2023, releasing this deceptive report.
Our "Referendum" is the Provincial Election Monday 29 May, and its advance voting.
How is City's report deceptive?
• Pretends $316m worth of CSEC mortgage repayment over 35 yrs is upfront capital investment
• Hides the fact the City needs another $316m up front to build arena complex - from Where?
• Disguises $17m/yr of mortgage payments as Lease Income
@JorgeDe83010797 Hi. The other night we chatted briefly about locomotive axle bearings on @MriyaReport and I decided to get up to speed on it a bit. If you want to chat about this on the Spaces, let me know. I can cover generally while you dive deeper.
@JorgeDe83010797@MriyaReport This video goes deeper into the assemblies. I gathered from the Spaces that Russia does not make the bearings themselves, but was curious about their domestic capability for fabrication and maintenance of all parts of the axle box, or even the bogeys.
Let me know if I misunderstand.
• 2 wheels + axle + gear = WAG = wheel set
• 2 or 3 wheel sets assembled into bogey aka truck(?)
• axle box contains the (tapered) roller bearing and transfers load to axle
• have to track roller bearing wear & replace
🧵 Gov of Alberta's Backdoor Prohibition
on School Mask Mandates
IMO, this is the policy holding back EPSB and other school boards in mandating masks in any school, for any period of time, no matter how bad the outbreak.
How is a 6 Sep 2022 Policy a collateral attack on a 26 Oct 2022 Decision?
Because Justice Dunlop made it clear in August that Minister Lagrange would have to enact a Regulation to prohibit masks, not just write a letter and threaten school boards.