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structural engineers like safety factors of 7 or 8 times.
At least they did a few decades ago.
I doubt that has changed.

these EV suvs aren't heavier than large pickups and delivery vans and trucks

I'd guess bridges and roadways are plenty safe until past 2035 or more

Now tell me how to get around that horrible I10 bridge in Baton Rouge when driving east from Texas to New Orleans????

Dood.

I-10 needs a bypass around Baton Rouge so bad.  I recently contacted an old friend of mine about a good time to get through there and he said that anymore, there's not really a good time to go through BR.  When I was growing up it was okay.  After Katrina emptied out half of NOLA to BR, people who never went back, traffic was miserable for several hours around the rush hours.  However, the last few times I've been through there it was miserable even when it should've been good.

Went that way to Memphis over Thanksgiving, I got to BR about noon on a Wednesday.  Thought I'd be safe, but neaux.  Suckity suck suck suck.  Came home Sunday and thought surely I'd be okay on a weekend.  Neauxp.  As soon as I got off I-55 in Hammond on to I-12 headed into BR, traffic was stalled.  I crawled all the way to BR, thinking after I got to the 10/12 merge it would pick back up.  Neaux.  I crawled through BR, thinking after I got to the 10/110 split it would pick back up.  Neaux.  I crawled over the Mississippi River bridge thinking after Port Allen it would pick back up.  Lolz.  I crawled all the way across the Atchafalaya Basin bridge (I call it the Forever Bridge) and clear to Lafayette.  There were spurts of traffic that moved well, but always frequent stopping and sitting.  Not until I was through Lafayette did things finally move consistently.  I've never seen anything like it.  Especially on a Sunday.  I guess maybe it was holiday traffic with everybody coming home, but dear god.  I lost nearly 4 hours to that mess.  

I'm not doing that anymore.  You can go to the Texas games when they play in BR.  I may never mess with that city again.  

But while an EV sedan might only weigh 30% more than its ICE equivalent, I saw some info that EV trucks and SUVs can weigh up to 2.5X their ICE equivalents.

So, how much of the total vehicle base is currently sedans versus trucks/SUVs, and where are those trends headed?

I'd say it's worth a reasonable amount of concern.

Where are you getting 2.5X?

If I compare the F-150 (4275-5757) with the F-150 Lightning (6015-6893), even if you take the lightest possible ICEV configuration vs the heaviest possible BEV configuration you're only at 1.6X. But that's not even a fair comparison, because the Lightning is only offered in a SuperCrew cab whereas the lightest F-150 will be regular cab, so not directly comparable. The lightest ICEV SuperCrew is 4687 as far as I can tell, which gets you down below 1.5X for an actual comparable vehicle. 

Where are you getting 2.5X?

If I compare the F-150 (4275-5757) with the F-150 Lightning (6015-6893), even if you take the lightest possible ICEV configuration vs the heaviest possible BEV configuration you're only at 1.6X. But that's not even a fair comparison, because the Lightning is only offered in a SuperCrew cab whereas the lightest F-150 will be regular cab, so not directly comparable. The lightest ICEV SuperCrew is 4687 as far as I can tell, which gets you down below 1.5X for an actual comparable vehicle.

I saw it on google.

Evan at 1.5X you're cutting into safety margin pretty significantly.

Are you suggesting  that if vehicles  are getting 30-50% heavier on average, it won't become a significant risk factor?

Because I can tell you that if CPU temperatures increased 30-50% and I didn't do anything to update/upgrade the cooling solution, we'd be looking at immediate catastrophic failure...

Maybe for buildings. For bridges I've always heard 3.

you're probably correct
I didn't draw many bridges
I should have asked my father, he built over 100 bridges

When I was a kid, we'd drive to my grandparent's house in east Tenn.  It was nearly all two lane road, and not many trucks fortunately, as we'd get behind one and have to slow until we could pass.  Of course now on freeways there are trucks galore, many close to 40 tons, and often back to back to back to ... 

Freeway bridges have to be safe for 40 t trucks nose to tail, which is a lot more than EVs would weight in the same space.  Even three Humners in place of one truck doesn't match its weight. 

Parking garages, there I don't know.

What about 40 EV trucks nose to tail?  That's the issue we're commenting on.  If/when EVs completely replace ICE, or even get to be half the total population, what then?

I saw it on google.

Evan at 1.5X you're cutting into safety margin pretty significantly.

Are you suggesting  that if vehicles  are getting 30-50% heavier on average, it won't become a significant risk factor?

Because I can tell you that if CPU temperatures increased 30-50% and I didn't do anything to update/upgrade the cooling solution, we'd be looking at immediate catastrophic failure...

Hey, I'm all for discussing the numbers. I'd just prefer that they're real numbers, not made up numbers.