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Thread: Typical material densities

  1. #1
    Inceptor
    Join Date
    Feb 2018
    Posts
    4

    Typical material densities

    I saw a list of Create sizes by rank (eg volume 9 rank is this many feet per side) although I'm not sure if it was accurate. According to my calculations, a character with rank 9 could make a single object of just under 8 feet by 8 feet by 8 feet (512 cubic feet, just over the 500 cubic foot limit you could get at that rank), which doesn't seem very useful if you wanted to make a wall of material. According to a link I found online, that same character could make a 30 foot radius dome of material (presumably a thin wall of stuff with Toughness up to 9).

    Link: http://www.mygurps.com/mm3e.shtml

    I am bad at math, so maybe you should trust that website more than my figures. It's also possible we're both right (they weren't making cubes of stuff).

    So I started thinking about using Move Object to move material around (I would need these numbers for an Element Controller). But how much material? That would depend on the material, of course (And how many ranks in Area you took, too!)

    A pretty good density list can be found here: http://www.coyotesteel.com/assets/im...rcubicfoot.pdf

    The list was generated by a steel company (which weighs roughly 500 pounds per cubic foot, to keep the math simple) although it displays other useful materials (granite, soil, water, alcohol, gold, lead, wood, etc). A character with Move Object 4 (whether Limited to metals or not) could lift more than 1 but less than 2 cubic feet of steel (they could lift 800 pounds). I looked up the weight of a steel girder (800 pounds) which you can lift with Move Object 4 as well.

    The same character moving water could lift 13 cubic feet of water, which could create a "cube" of 2.35 feet per side. I guess you need Precise if you want an actual "cube" of water. That's not much of a splash.

    This seems like a good cubic feet to linear feet calculator: http://www.endmemo.com/cconvert/ft3ft.php

  2. #2
    Inceptor
    Join Date
    Jan 2018
    Posts
    21

    Re: Typical material densities

    Also keep in mind that material toughness in the charts are based on 1 inch of material. So 8ftx8ftx8ft can actually make a 1 inch thick wall, with 9 Toughness, that is 73ftx73ft, which basically the same as a 30ft radius circle.

  3. #3
    Inceptor
    Join Date
    Feb 2018
    Posts
    4

    Re: Typical material densities

    I am presuming no "discounts" for being thinner than an inch (eg how thick is a pane of force)?

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