- Design of a Granite/Stone Beam -

Replies

• 

  Kaustubh Katdare

  Are our Civil Engineers reading this? 😀
• 

  J. Guru Prasanna

  The_Big_K

  Are our Civil Engineers reading this? 😀

  guess not.. but I hope they'll be doing it in a while
• 

  Alvord12

  Are you assuming that the 500 KN acts as a point load on the center of the beam? Also, I'm not too sure about using the IS 456:2000 for construction involving stone/granite. The maximum bending moment formula was found with research on concrete, can't say that the same can be applied to stone/granite.
  
  These are just my thoughts, feel free to correct me if you think differently! 😀
  
  Edit: Yup, just confirmed this with my friend, you cannot use IS 456:2000. You'll need to use IS 3316:1974 for Structural Granite. You might also want to check #-Link-Snipped-#.
• 

  J. Guru Prasanna

  Thanks for your reply..
  500kN is not a point load acting on the beam.. the calculated value of UDL on the beam (entire span) is approximately 14.5 kN per sq.meters..
  I feel we can use the bending equation M=fZ (M-moment, f-stress, z-section modulus) for any beam since we use the same equation for concrete as well as for steel... but i'm not sure with my answer
  and could you please upload IS 3316 here ? (I'm unable to find a pdf on the net)
  thanks in advance
• 

  Alvord12

  Yeah, I asked my professor about the bending equation case, he says it is possible to use that equation. The equation is like; Stress/y = M/I = E/R; So, assuming that y = d/2 where d is the depth of the beam, you can calculate the the depth if you know the permissible stress for Granite/Stone.
  
  Else you could use a UTM to calculate the value of 'E' for the type of stone you will be using and derive the value of the radius of curvature for the same.
  
  As for the IS code, I'll check back with my friend if he has one. 😀
• 

  J. Guru Prasanna

  Thank you
• 

  J. Guru Prasanna

  Alvord12

  Are you assuming that the 500 KN acts as a point load on the center of the beam? Also, I'm not too sure about using the IS 456:2000 for construction involving stone/granite. The maximum bending moment formula was found with research on concrete, can't say that the same can be applied to stone/granite.
  
  These are just my thoughts, feel free to correct me if you think differently! 😀
  
  Edit: Yup, just confirmed this with my friend, you cannot use IS 456:2000. You'll need to use IS 3316:1974 for Structural Granite. You might also want to check #-Link-Snipped-#.

  I got the IS 3316.. #-Link-Snipped-#
  but nothing related to the load distribution has been mentioned there..
  is there anyother code that i should use for getting the load distribution or can I just assume the same as in IS 456 for concrete ??
• 

  J. Guru Prasanna

  It has been concluded that "the granite beam cannot be designed by any approximate method".. the loads acting on the structure are to be calculated and the required depth has to be obtained by a trial and error method alone.. or an experienced engineer could give a proper span to depth ratio which can be used to find out the depth..
• 

  s p gupta

  Sir hw can I get the latest is code for my personal information about civil engineering