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Recent content by pmkPE

  1. pmkPE

    Shear stirrup requirements in reinforced concrete corbel design

    Thanks, I'll look into it.
  2. pmkPE

    Shear stirrup requirements in reinforced concrete corbel design

    Mike, The "long" corbel is point loaded. Thanks, I did manage to find professor Mattock's research on the PCI Journal website. Initially I just searched under the quarter for which his articles were referenced. Surprisingly for the years that i searched (1975 and 1976) only two quarters for...
  3. pmkPE

    Shear stirrup requirements in reinforced concrete corbel design

    Thanks Mike, I appreciate the information. Paul
  4. pmkPE

    Shear stirrup requirements in reinforced concrete corbel design

    What are the dimensional limitations for a "bearing ledge" along a wall and a corbel? Where are these limitations stated? In what code/section?
  5. pmkPE

    Stirrup requirements in reinforced concrete corbels per ACI-71

    Its been quite a while since I started a thread in this forum. I forgot about the ACI Code Forum. Please see the following thread for my question that I posted earlier to the 'Structural engineering other technical topics forum;' thanks in advance, Paul thread507-302529
  6. pmkPE

    Shear stirrup requirements in reinforced concrete corbel design

    I am reviewing a structure designed to the ACI-71 code which states shear stirrups are required for corbels. A.h of stirrups is to be no less than 50% of primary tension steel area, A.s. The designer decided that since the shear could be carried by the concrete that stirrups would not be...
  7. pmkPE

    Will AutoCAD 3D change engineering?

    daylight211, your discipline is civil/environmental. if you do site design/utility/highway design/terrain modelling then yes 3d modeling will be most helpful (i.e.Autodesk, Eaglepoint). For other applications you will want to meet with your competitors/colleagues as your existing and...
  8. pmkPE

    HEAT TREATMENT OF 4340

    Thanks metengr! Fortunately that is what the author used in his calculation. My next question(s) is how did you determine these values? based on ASTM A829?
  9. pmkPE

    HEAT TREATMENT OF 4340

    metengr, Thanks for your input- I really do appreciate your assistance. In response to your last question if the BOM states ASTM A829 Grade 4340 ( for washer plate material) without any additional information - what would you expect the minimum yield and the minimum ultimate tensile...
  10. pmkPE

    HEAT TREATMENT OF 4340

    metengr: What if it is not called out? What should be the default values?
  11. pmkPE

    HEAT TREATMENT OF 4340

    Correction the BOM calls for ASTM A829 not 826.
  12. pmkPE

    HEAT TREATMENT OF 4340

    ASTM A829 provides in Table 3 (Tensile Strength Ranges) the three potential "Specified Maximum Tensile Strengths" (up to 70 ksi, over 70 to 110 ksi and over 110 to 140 ksi) with the corresponding Tensile Stregth Range of 15, 20 and 25 ksi. ASTM A829 does not explicitly list for any of the 30...
  13. pmkPE

    HEAT TREATMENT OF 4340

    metengr and gil1985: Where did you obtain the tensile and yield properties for this particular material and grade?
  14. pmkPE

    Minimum Bend Radii

    What are the minimum bend radii for stainless 18 gage and 3/16" sheet steels?
  15. pmkPE

    HVAC: Pros and Cons of Heat Pumps

    Thank you for your time and expertise, I sincerely appreciate your efforts. :>)
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