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New Design Loads Required? 1

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dik

dik

Structural
Apr 13, 2001
25,677
PITTSBURGH (KDKA) — Several people have been injured and killed, and multiple others were trapped after a car crashed into the Biomat USA Plasma Center on the 1300 block of Western Avenue.

The car slammed 200 feet into the building, and witnesses reported seeing the car traveling at high speeds before crashing, according to Public Safety Director Wendell Hissrich.

One person was transported in critical condition, there are three fatalities and one person sustained minor injuries.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik
 
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wonder if the car's path was from that ramp
image_u39tbe.png


here is a current LIVE FEED
 
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Building interiors are not very strong or massive here, as they are usually sheetrock on studs. The moving vehicle potential energy needs to go somewhere.

thread176-457193 attempted to discuss the situation of vehicles impacting parking garages.

For the general case of any building sitting next to a street, or even sitting at the end of a street (T Intersection) there are no mandatory building code rules for the case of car hitting a building that I am aware of.

The ICC structural building code section 1607.7 does discuss vehicle impact in the context of buildings where vehicles are intended to be operated inside of them.

This seems to be an owner risk analysis thing. There is some guidance, but it is only invoked when the owner/builder deems it important.

UFC 4-022-02 Selection and Application of Vehicle Barriers
UFC 4-023-03 Design of Buildings to Resist Progressive Collapse
There is always the question of how much consideration of these issue is needed, where do we stop?

But this is not an idle question. There are two houses within 1 mile of mine that suffered impacts from out of control vehicles in the past year. In both cases the houses were uninhabitable until repaired.
 
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Considering the use of bollards, higher GFL etc ..could be options..

IMO, a security an safety assessment study is necessary rather than changing the design loads..




R-7535-bollard-14-510x360_hvt52h.jpg
 
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maybe the front seat occupants were more than 85 kg which I believe the design speck is for front seats in a car? And they were 100kg plus stereo typical US fattys?
 
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On the contrary one house in Twain Harte, CA where the road literally swerves around the house the owners wanted to place some LARGE ornamental rocks in the yard to stop cars from 'driving thru'. The town said "NO!" arguing that the "rocks presented a hazard to cars".



Keith Cress
kcress -
 
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Threes a few reports which say the SUV, so maybe 2 tonnes of vehicle, was doing high speed of up to 100 mph from that long straight road.

Nothing reasonable would stop that. Bollards like that would just launch the vehicle up in the air.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
 
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Several tons of crash rated planters might slow things down a bit. 100 MPH however is a lot of energy.
Screenshot_from_2021-06-13_18-05-41_fra7bm.png

Screenshot_from_2021-06-13_18-10-44_t3jyve.png
 
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Hturkak... I was jokin' about the loads... like the twin towers and the 747 loads... there are just some things you cannot plan for. Big concern is that they seem to become more common.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik
 
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I've designed a few attack resistant entrances... typically for 30-06 level of attack... got into it a couple of decades back when I was looking at an architects drawing and it showed lexguard windows in a light frame and a normal partition wall... at close range a 30-06 will just nicely do 5/8" mild steel... I did a couple of 'mark-ups' and they caught the eye of one of the architectural partners, and I had additional work I didn't expect. The architect was thrilled about his 'bulletproof glass', and really pist when I used my .338 to 'drill' a hole through it.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik
 
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In the military we made the road twist or turn upstream of checkpoints and gates to ensure vehicles had no significant kinetic energy prior to reaching our troops.

Going back to my time running a wrecker, I can attest that vehicles end up much deeper into storefronts than homes due to their more open floorplan.
 
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At least good bollards would have stopped the subframe and you would have just had the sheet metal body hitting the building.
The SUV was coming down off of the bridge ramp and failed to make the turn.
It looks like the building is only about 60' wide, and they made it nearly clear through.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed
 
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Neat fence...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik
 
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100mph does not sound a vehicle out of control. A set of effective bollards will force somebody to use different attack strategies, like charging in to the building with a semi-automatic rifle or pistol. If the bollards can top a two ton SUV, you can always hijack a big truck.

--
JHG
 
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quote said:
Nothing reasonable would stop that.
Click to expand...

A 2 tonne vehicle doing 160 kmh is ~2 megajoule. There are plenty of interesting bollard products out there that will stop that level of attack.



This bad boy will do 30 tonnes at 80kmh. That's 7.4 megajoule.

 
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