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Fire Truck lateral load 1
- Thread starter Engin1
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I'd be inclined to look into how AASHTO handles this for comparable sized trucks on bridges. If that winds up being too punitive maybe you can scale you load down based on the square of your anticipated vehicle speed relative to the speeds assumed in AASHTO.
You could look into using AASHTO or if in Canada the CHBDC.
It is probably overkill for you to use either as they use a vehicle stopping at highway speeds for their dynamic situation. I doubt your fire truck will be driving into the garage at 90kph and slamming on the brakes to stop. It is a controlled environment so they are probably rolling around at very little speed.
You could try and apply some dynamic analysis using a stopping distance and speed. But probably too much time.
Braking load is complex it depends on many factors. Which is why highway codes have done much testing to come up with a simple static load applied either at deck level or at the center of truck mass.
If you want a quick and dirty number for sanity, you could maybe take a small % of the truck GVW and apply it at either the deck surface or truck center of mass. But this is probably much smaller than your wind/seismic loading on the bldg.
It is probably overkill for you to use either as they use a vehicle stopping at highway speeds for their dynamic situation. I doubt your fire truck will be driving into the garage at 90kph and slamming on the brakes to stop. It is a controlled environment so they are probably rolling around at very little speed.
You could try and apply some dynamic analysis using a stopping distance and speed. But probably too much time.
Braking load is complex it depends on many factors. Which is why highway codes have done much testing to come up with a simple static load applied either at deck level or at the center of truck mass.
If you want a quick and dirty number for sanity, you could maybe take a small % of the truck GVW and apply it at either the deck surface or truck center of mass. But this is probably much smaller than your wind/seismic loading on the bldg.
I imagine with the truck and the platform having similar weight it will be different than a bridge.
But yeah, the frictional force limit of the tire seems like would be your worst static case.
80k x 0.7u = 56k
Hopefully it won't be a situation like kids do at parking garages and accelerate 10 cars up to speed and then slam on the brakes simultaneously to see how much they can make it sway.
But yeah, the frictional force limit of the tire seems like would be your worst static case.
80k x 0.7u = 56k
Hopefully it won't be a situation like kids do at parking garages and accelerate 10 cars up to speed and then slam on the brakes simultaneously to see how much they can make it sway.
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Lomarandil
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