Why does hurricane/tornado winds blow out building frames?

Question

Buildings don't get twisted around by tornados, the winds of tornados/hurricanes get inside the buildings and blow the walls and roofs outward and upward, why??

Answer 1

The winds are so violent that the building frames are unable to withstand the force.

Winds over 150 mph can be formed by either of these.

Regards,

Dan

Answer 2

...Because they're hurricanes?

Answer 3

With tornados, the damage is most often caused by the difference in air pressure.

In tornado alley, the center of the U.S., most people are taught to open doors and windows to prevent this.

At sea level, air pressure is about 14psi. If a building is closed, or doesn't have enough openings to allow the air inside to get out, when a tornado comes near, it causes the air pressure outside the building to drop, and the air inside trying to expand to be equal with the air pressure outside causes the weakest parts of the building to explode outward.

The closer the tornado, the worse the effects.Very close, and the building may disintegrate. Across the street, and roofs go, the next block over, closed windows are shattered.

With hurricanes, it's just like the three little pigs, it huffs and puffs so strong that it blows down anything not strong enough to stand up to it, with winds that blow long and hard for a long time, reversing to blow the opposite direction as the eye of the storm passes.

Yes, Storm chasers did say what you stated, but it is only ONE of the ways tornados vent their destructive forces.

Air pressure differential is also valid and proven through forensic evidence, actual film of the destruction in real time, and reproducable scale and advanced computer modeling.

Also, I've worked in hurricane areas in reconstruction, I've never seen ANY evidence of any building blowing 'out' as you stated, just knocked flat....and you don't have to be a rocket scientist or forensic architect to know when a swath of buildings is knocked flat for as far as you can see, and every bit of wreckage is layed down in the same direction, that a helluva' wind flattened them.

In the late 70's, Cheyenne, Wy. was hit by one of the longest duration tornados on record. I was first on the scene after it's passage through my neighborhood. Many homes had a single wall missing, the one that faced the path. In most of those homes, nothijng in the rooms was even out of place, and the windows in ths rest of the house were shattered, on the opposite side of the homes from the missing walls, the glass was INside the house, as if sucked towards the missing wall. Rather elegant proof the house wasn't pulled apart from shear wind effects, which would have left a far different damage footprint. That footprint is often seen here in the Phx., Az. area, where in the last 10 years, many wind shear damages have occurred, always with a much greater scene of collateral damage to the structure and wider footprint in the affected building it's self.

Answer 4

because the buildings are cheap. typhoons don't do that here (japan)