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the weight of concrete

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  • the weight of concrete

    Hello I was hoping someone could help me figure this out.

    I am building a floating floor for a music studio and I need to know the weight per square foot of concrete, so i can calculate the amount of neoprene pucks i need.

    The concrete will be 4" high and it will cover a surface area of 156 square feet.

    Ultimately I need to know the weight per square foot of concrete that i will be using granted it will cover 156 square feet and be 4inches high. I do not know how to convert cubic feet to square feet to be able to tell how many cubic feet of concrete i will be using. Creating my problem.

    Can anyone help me get to the bottom of this equation?

  • #2
    Re: the weight of concrete

    Originally posted by Kid2012 View Post
    Hello I was hoping someone could help me figure this out.

    I am building a floating floor for a music studio and I need to know the weight per square foot of concrete, so i can calculate the amount of neoprene pucks i need.

    The concrete will be 4" high and it will cover a surface area of 156 square feet.

    Ultimately I need to know the weight per square foot of concrete that i will be using granted it will cover 156 square feet and be 4inches high. I do not know how to convert cubic feet to square feet to be able to tell how many cubic feet of concrete i will be using. Creating my problem.

    Can anyone help me get to the bottom of this equation?
    There are 12" in a foot, so 4" is 1/3 ft. Multiply area by thickness, you need 32 ft³. It weighs about 145 lb/ft³ or 4640 lb. 1 ft², 4" thick will be 29.75 lb

    However, you should also consider the load on the floor from people, equipment, etc.

    Comment


    • #3
      Re: the weight of concrete

      Originally posted by Kid2012 View Post
      Hello I was hoping someone could help me figure this out.

      I am building a floating floor for a music studio and I need to know the weight per square foot of concrete, so i can calculate the amount of neoprene pucks i need.

      The concrete will be 4" high and it will cover a surface area of 156 square feet.

      Ultimately I need to know the weight per square foot of concrete that i will be using granted it will cover 156 square feet and be 4inches high. I do not know how to convert cubic feet to square feet to be able to tell how many cubic feet of concrete i will be using. Creating my problem.

      Can anyone help me get to the bottom of this equation?
      Oops, wrong key somewhere John.

      4"/12" = 0.333 ft, so: 156 ft2 * 0.333 ft = 52 ft3

      My concrete weights are slightly higher. Standard concrete weighs approximately 150 lb/ft3, dependent on mix design.

      52 ft3 * 150 lb/ft3 = 7800 lbs
      7800 lbs / 156 ft2 = 50 lb/ft2

      Lightweight concrete is available for applications such as this but I have no specifications on it, so call and talk to a reputable concrete company or three.

      As stated, you must consider additional loads to the floor. A call to a structural engineer would definitely be in your best interest.

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