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  1. ARJ1

    What is the Dmin in Seismic Design Manual

    Thanks civilperson. I found a reference that explains it, "Structural Steel Design" by Alan Williams. "Dmin" denotes the number of 1/16 inch in weld size. In other words, if Dmin = 2.56, then this means your minimum weld size to fully develop load "Ru" is 2.56/16, or rounding up, 3/16. Or if...
  2. ARJ1

    What is the Dmin in Seismic Design Manual

    On page 4-21 of the Seismic Design Manual, there is a calc for the variable Dmin. The book reads as follows: "The minimum required single-sided fillet weld size is, Dmin=Ru/1.392kips/in(lw)=.784 Could someone tell me what this unitless value represents. Thanks in advance
  3. ARJ1

    RELATIVE RIGIDITY IN WOODEN SHEAR WALLS

    Thanks everyone, Mike, I did ask him why. He didn't know. Whyun, Yes, you are correct. And I guess ultimately it really doesn't matter what factor they used. The relative "stiffness" to be applied to the shearwalls can be determined from the reciprocal of the deflections of the shearwalls. I...
  4. ARJ1

    RELATIVE RIGIDITY IN WOODEN SHEAR WALLS

    I have noticed on some structural calculations that while the relative rigidity seems to be proportionate to the reciprocal of the deflection, the values seem to be multiplied times some factor. For instance, lets say the deflection is .5", then the relative ridgity would be 2. But on some...
  5. ARJ1

    RELATIVE RIGIDITY IN WOODEN SHEAR WALLS

    How do you convert the shear deflection to relative rigidity?
  6. ARJ1

    RELATIVE RIGIDITY IN WOODEN SHEAR WALLS

    I know with masonry shear walls you take the height divided by the depth plug the answer into a chart and get the R value. I also know that rigidity is the reciprocal of deflection. Is the rigidity of a wooden shearwall the reciprocal of the deflection? When designing wooden shear walls, how...
  7. ARJ1

    WHAT ARE THE PURPOSE THESE BLOCKS

    If anyone can recommend any reading material on this subject, I would really appreciate it.
  8. ARJ1

    WHAT ARE THE PURPOSE THESE BLOCKS

    THANKS CJ AND MIKE.
  9. ARJ1

    WHAT ARE THE PURPOSE THESE BLOCKS

    When a shear wall is perpendicular to truss spans, shear blocks are specified over the shear wall. Sometimes I will see on the plans, this line of shear blocking continue pass the point of where the shear wall ends. My question is: (1) Why is this done? (2) Why is flat 2x blocking sometimes...
  10. ARJ1

    2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?

    Thanks for all the comments.
  11. ARJ1

    Simpson Mending Plate for custom made wood truss

    It clearly says "Connectors are not load rated." So basically you have to pretend like they are not there and have the truss repaired accordingly. Don't wait for someone to tell you what you want to hear. It isn't worth the risk.
  12. ARJ1

    2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?

    Thanks RARSWC
  13. ARJ1

    2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?

    JAE, That would make sense. That would explain the need for the adjusted shear formula. Thanks
  14. ARJ1

    2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?

    THE 2005 NDS SECTION 3.4-7 SUBSECTION (C)(PAGE 17) STATES: "WHEN CONCEALED HANGERS ARE USED, THE ADJUSTED DESIGN SHEAR, Vr', SHALL BE CALCULATED BASED ON THE PROVISIONS IN 3.4.3.2 FOR NOTCHED BENDING MEMBERS. MY QUESTION IS, WHAT DO THEY MEAN BY CONCEALED HANGERS? THEY ARE NOT REFERRING TO...

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