1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Dead load

  1. Jul 1, 2012 #1
    1. The problem statement, all variables and given/known data

    A beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. Calculate the dead load that can be safely supported when applied to the middle of the beam.

    2. Relevant equations

    Dead Load= volume * weight of material

    3. The attempt at a solution

    A=100*100=10000 mm2=0,001m2

    V=0,001*3=0,003 m3

    Dead Load = 0,003 m3*24 KN/m3=0,072*1000= 72 N ??????

    Am I right with my calculations?? Many thanks:P
  2. jcsd
  3. Jul 1, 2012 #2


    User Avatar
    Gold Member

    I don't know anything about strength of materials, but I'm puzzled by your having made a calculation based on the characteristic "a beam".

    Wouldn't you get a different result if the beam were made of styrofoam than you would when it was made of steel?

    Perhaps I'm not understanding what you are trying to do
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook