In Iron Man (the 2008 film), right after Tony has his first test run in the Iron Man Mark-2 suit, he comes back to his Malibu beach house, says "kill power" and as a result he breaks through 2-3 layers of concrete and crushes the car he falls on.

Is the Mark-2 suit really heavy enough to do that? My doubt here is whether it was just a scene written in a bit of an exaggerated manner, or if the suit is really heavy enough to do that?

  • 3
    If it were then the roof of that Arc reactor/factory building must have been built to withstand nuclear bombs.
    – Xantec
    Mar 23, 2014 at 15:46
  • It's quite a funny scene. Not one to overthink...
    – Valorum
    Mar 23, 2014 at 18:09
  • @Richard - the scene is funny alright... just got me curious... coz later he lands on a non-metal panel in Iron man2 opening (Stark Expo scene) and the surface doesn't even scratch...
    – Stark07
    Mar 23, 2014 at 19:45
  • I've completely deleted my old (wrong) answer and added a new (right) one.
    – Valorum
    Mar 23, 2014 at 20:22
  • Doesn't necessarily need to be heavy. Velocity can do some amazing things - As evidence, a paper check embedded in a telephone pole by a tornado: gra.midco.net/pcmiller/Elgin/1024-Elgin_check_002.jpg Combination of weight, velocity and small impact point (See such things as windshield/car window breakers as another example).
    – JohnP
    Mar 24, 2014 at 4:41

2 Answers 2


After some consideration I've come to the conclusion that it's very possible that the Mk2 suit could have sufficient weight to drop through a concrete floor and flatten a fibre-glass sport car body.

The original Iron Man Mk1 suit is described as being approximately 1500 pounds (over half a metric ton). The Mk2 isn't canonically weighed but there's a production quote from Shane Mahan (Head of Studio on Iron Man) stating that they were advised that the later suits would probably weigh something like 600-800 pounds or nearly a third of a metric ton.

600 to 800 pounds has always been the number that we kicked around

Assuming Tony's house conforms to Malibu Building codes then his floors are rated to a weight of 40 pounds per square foot. A suit that weighs something between 600-800 pounds would certainly fall outside the scope of this design standard and could very easily cause a structural failure including a "pancake effect" style floor collapse.

Similarly, a dead weight of half a ton hitting a sports car from a height of 10 feet would be more than enough to completely crush the bodywork.

  • I'm just wondering if falling from that little a height would give him momentum enough to break through 2 floors and a car.
    – Stark07
    Mar 24, 2014 at 3:43
  • 1
    @Ashishkulkarni -Ignore the momentum. Just the weight alone is enough to break the floors If they aren't reinforced
    – Valorum
    Mar 24, 2014 at 5:38
  • 3
    @AshishKulkarni in the movie clip, he does fry the floor first with his thrusters, which could have made it very brittle!
    – Mr Lister
    Mar 24, 2014 at 17:07
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    Now that I remember it, in Iron man 2, Rhodey walks all over the house wearing the Mk2, and doesn't break the floor walking around, does he? According to your weight calculations, even stepping on the house floor should have been enough to break it down.
    – Stark07
    Apr 16, 2014 at 13:19
  • 1
    And then what of the opening scene of Iron Man 2, wherein he drops with quite some initial momentum onto a glass/fiber dais, and doesn't even dent it? I personally feel that the Iron man team overplayed the weight card in the particular scene.
    – Stark07
    Apr 16, 2014 at 16:17

No it wouldn't... That was just 'eye candy' written by and for people with limited or no knowledge of metallurgy or mass/density - specific gravity (sg). Humans are somewhere around 2.4 to 2.5 cubic feet in volume. For a human form and shape to weigh 900 pounds, it would be the same weight as a human statue made from a solid piece of cast iron. Considering that his armor is only a 1/16 to 1/8 inch thick shell/skin with some weaponry added, the overall weight (including normal body weight inside the shell) should not exceed 300 pounds. That would be a very liberal maximum weight.

If one of your 300 pound friends started jumping up and down on the floor in your upstairs bedroom, would he crash through the floor?




The above armor is complete with protective under-padding under full-body chainmail and covered over with plate armor yet weighs in at less than 150 pounds.

  • 3
    Except that we know that the studio were advised that the suit weighs over 600 pounds. Ultimately that depends on the density of the metal used in the making of the suit. Tungsten, for example is nearly twice as dense as lead and over 3 times denser than iron
    – Valorum
    Mar 23, 2014 at 22:03
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    @Morgan: (1/2): You don't work with the magical metals Iron man uses, nor do you have a good measurement of how thick the suit is. Considering that it has been shown to include multiple weapons, along with their launch systems, AND a full-bore propulsion system along with artificail articulation, "600 pounds" is a fair measurement.
    – DougM
    Mar 23, 2014 at 22:18
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    @Morgan - what's your source for the statement "his armor is only a 1/16 to 1/8 inch thick shell"? I would have assumed it was a lot thicker just from the look of it, especially in the upper torso.
    – Hypnosifl
    Mar 23, 2014 at 22:24
  • 1
    @DougM, 20 feet? When he cut power he was no more than 2 foot from the floor. I understand the desire to defend a dearly held mythos but the facts don't support it. (Pun intended)
    – Morgan
    Mar 23, 2014 at 22:48
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    @Morgan, but why assume it's constructed like regular armor? For example the chest obviously sticks out a lot more than 1/8 inch beyond the chest of the person inside, since it's power armor it could be basically all metal between the person's chest and the outer chest area of the suit, whereas that would probably make it far too heavy with regular armor. Also note that someone at xrobots.co.uk/IM6/index_foam.html constructed their own replica suit out of 10mm thick foam, which would be about 0.4 inches, a lot thicker than 1/8 = 0.125.
    – Hypnosifl
    Mar 24, 2014 at 2:35

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