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William Seger Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Nov-15-06 04:52 PM
Response to Reply #5
6. Empirical testing
The load carrying capacity of steel at various temperatures is determined by simply testing it.

"It seems that it would only start to weaken once once it is at the melting point. Before that, it would not be weakened at all."

No, steel does not behave like water; it behaves more like plastic. At 600oC, structural steel loses 40% to 50% of its load carrying capacity due to increased plasticity.
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  -What is the melting point of a substance? treestar  Nov-15-06 12:17 PM   #0 
  - what are you asking?  rman   Nov-15-06 12:56 PM   #1 
  - When does a material start to weaken?  treestar   Nov-15-06 04:26 PM   #4 
     - each (solid) material  rman   Nov-15-06 05:30 PM   #7 
        - Everything you ever wanted to know abut steel and fires ...  hack89   Nov-15-06 05:52 PM   #8 
        - OK, I'm getting that, but what is this phenomena  treestar   Nov-21-06 07:40 AM   #10 
           - elastic point  sabbat hunter   Nov-28-06 03:27 PM   #15 
  - Latent Heat  LARED   Nov-15-06 02:46 PM   #2 
  - Materials can weaken before they melt.  TheWraith   Nov-15-06 03:05 PM   #3 
     - But at what point do they start to weaken? At the melting point?  treestar   Nov-15-06 04:29 PM   #5 
        - Empirical testing  William Seger   Nov-15-06 04:52 PM   #6 
        - It depends on the material, but often well before the melting point.  TheWraith   Nov-16-06 11:35 AM   #9 
           - OK, so what are the conditions for these substances and how  treestar   Nov-21-06 07:42 AM   #11 
              - Ice Sculptures Are Carved  jberryhill   Nov-21-06 08:38 AM   #12 
                 - Under what conditions would a steal beam bend or break?  treestar   Nov-28-06 01:34 PM   #13 
                    - Well, all the pieces were....  wildbilln864   Nov-28-06 02:48 PM   #14 
                       - during the clean up  sabbat hunter   Nov-28-06 03:46 PM   #16 
                       - What makes you think that?  jberryhill   Nov-28-06 08:22 PM   #17 
                          - Regardless....  wildbilln864   Nov-29-06 12:49 AM   #18 
                             - BRILLLIANT argument! Simply BRILLIANT.  MervinFerd   Nov-30-06 01:39 PM   #19 
 

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