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- Fire truck loading - Structural engineering general discussion - Eng-Tips
[blue]Fire truck loading will be significantly higher than HS-20 The normal fire truck axle and wheel loading will be within AASHTO HS 20 when it is traveling from point A to point B But when they set up and set the outriggers, all bets are off The punching shear must be considered and will drive the thickness of the slab
- Fire Truck Loading - Structural engineering general discussion
2) Fire truck load with (2) front and (2) rear outiggers The outriggers had an 8" x 8" bearing surface and the front and rear outriggers were spaced 16'-8" apart and the outrigger width was 7'-10" The front outriggers had a reaction of 12 kips each (24 kip axle)and the rear outriggers had a reaction of 29 kips each (58 kip axle)
- Fire Truck Loading - Structural engineering general discussion
The Fire Truck is HS-20 Loads I think are per AASHTO Without knowing your existing structural conditions and spans, I would start with a uniform live load of 300psf to 350psf as a cursory quick and dirty check
- Fire engine wheel load - Structural engineering general discussion
If you use 30k per axle, the load would be 7 5k per wheel Tires will have a center-to-center distance of about 14 to 16 inches, so you will have overlapping wheel stresses Width of tire will be about 8 to 10 inches, depending on tire size Tire pressure would be 100 to 110
- Fire Truck loading using AASHTO LRFD 2 - Eng-Tips
There are a number of older threads on the topic of fire truck loading on this site None of these seem to reflect the HL-93 notional live load model currently used for bridge design under AASHTO LRFD I have an underground parking garage which will have a fire truck access lane at the highest (grade) level
- Fire Truck Load - Structural engineering general discussion - Eng-Tips
110' Platform Truck has Weight = 73,500 lbs, Wheel base = 252 quot;, Front axle = 21,500 lbs, Rear axle = 52,000 lbs' Plus impact That's what we used ones for design of structure near fire station Who knows what they may get in 5 years Good luck
- Truck loading on an elevated slab - Structural engineering general . . .
The fear was that in a fire, the firetrucks would drive up on the curbs, or delilvery trucks might do the same and the 250 psf was supposed to be representative of those two occurrances Now I'm not sure that 250 would be always equivalent to an HS20-44 truck wheel load But it's probably not too far off
- Designing gravel road for fire engine loads - Traffic Engineering
The fire chief wants me to prove that a gravel ranch road is adequate to support a 75,000 lb fire truck Being a ranch road, traffic is very light There will just be the occasional, if ever, instance of a fire truck driving by Normally, I use EAL, TI, etc , along with R-values to design a pavement section
- AASHTO H-20, HS-20. . . - Codes and standards general discussion - Eng-Tips
Therefore, the pressure would appear to be equal to 16 kips (10" x 20") = 80 psi or 11 5 ksf In case you need to know, these two tires on the axle are spaced six feet apart (center-to-center) transverse to the direction of traffic and the successive axles of an HS truck are 14 feet apart along the direction of traffic Good Luck
- Tire Contact Area - Structural engineering general discussion
As I mentioned with a smaller truck they give you wheel widths that are better suited for a bike Would highly recommend going through Chapter 3 of the LRFD spec, you'll see the load factor varies based on your limit state (1 75 for Strength I, 1 35 for Strength II which is for special owner-specified truck) and is lower for other limit states
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