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  • Users: jvvse
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  1. jvvse

    Design shear at wood beam taken 'd' from support?

    Pff now I feel dumb. That's the first place I should have looked. Thank you!
  2. jvvse

    Design shear at wood beam taken 'd' from support?

    Question: Is it acceptable to design a wood beam for the shear at 'd' from support? I researched this topic, here and elsewhere, but was unable to find a good answer. This thread (http://www.eng-tips.com/viewthread.cfm?qid=21883) had good explanations for steel and concrete, but wood fell off...
  3. jvvse

    Designing collectors based on shear wall capacity

    I agree for the multi-story system, so let's just stick to single story where there is only one diaphragm loading the shear wall. This example could also be considered as the top story of a multi-story building. Is there anywhere that this is stated as acceptable? Both AISC and AISI allow...
  4. jvvse

    Designing collectors based on shear wall capacity

    Framing system: Light-frame bearing walls with wood sheathing. Codes: IBC, ASCE 7, NDS SDPW&S Is it acceptable to design collectors based on the capacity of the shear wall, in lieu of using omega, rho, or the other required loads per ASCE 7? While I have not seen anything explicitly or...
  5. jvvse

    woodwork shearwall reports

    None that I know of. It's very typical for 3rd party programs to have their own header. It helps the plan checker know that the engineer is using a program instead of their own calculations and gives it some trust. Without the header, a plan checker might ask what the program is, how it...
  6. jvvse

    what is the bearing area formula for anchor bolt plate?

    Sorry to show up late. There is a lot of interpretation with what is applicable when using bearing plates. ACI 318-11 is a little more explicit with what is applicable. D.2.2 specifically says that multiple anchors connected to a single steel plate are not applicable, and D.2.3 does not...
  7. jvvse

    Standards of Seismic Safety for Existing Federally Owned and Leased Buildings (RP 8) questions

    That was a lot of reading! The 1997 UBC designs for Life Safety, so if you can prove that it was in-fact designed for that code then you should be in the clear. Otherwise you will have to use ASCE 31 to verify the building. I couldn't tell you about the other forms, I have only limited...
  8. jvvse

    Steel SMRF Beam Bracing

    Ack sorry the first one should be 1000 kips/in (with h = 12").
  9. jvvse

    Design of a tree as a structure / inspectors gone wild

    I had a blast reading this thread. Now I don't feel so bad about the inspectors I deal with.
  10. jvvse

    Is automating structural drafting possible/worth the effort

    My firm currently has a whole suite of LISP routines that make drafting very fast. I'm looking into improving it as we are branching out into newer areas, but without this automation you're really hurting yourself for time.
  11. jvvse

    Steel SMRF Beam Bracing

    I recently looked into lateral bracing of steel beams. Per AISC, I need to brace both top and bottom flanges. I wanted to check the stiffness of just using stiffener plates to brace the bottom flange when the top flange is fully braced. See attached. When I check it this way, the stiffness...
  12. jvvse

    Steel moment frame at roof ridge

    Some engineers just call that a miter joint, but I would be more specific. Full CJP welds all around. Since the 12x6 is slanted, they can line up all 4 sides with the 6x6 tube.
  13. jvvse

    Vertical friction on Retaining Wall

    Retain-Pro is the one you can tie into Enercalc, right? I've always hated their UI and complexity, it makes it very easy to miss something or make mistakes. I have always used a custom spreadsheet. However, we have recently looked into the Tedds software. They have modules much like Enercalc...
  14. jvvse

    Vertical friction on Retaining Wall

    If you have a heel, then your angle of friction would indeed be through the soil instead of at the face of the concrete. You still have static friction to overcome before there is movement. I wouldn't know how to quantify that friction, as I'm very inexperienced in soil mechanics. The soil...
  15. jvvse

    metal stud plywood sheathing shearwall - blocking

    It's also called bridging. A few manufacturers now have both bridging and blocking for metal studs that is very easy to install. A typical detail is to use pieces of track between the studs, where the web is bend up and screwed into the web of the studs while the flanges go straight and are...
  16. jvvse

    Vertical friction on Retaining Wall

    I ran across something interesting lately. An engineer that uses friction on the face (dirt side) of a retaining wall to resist overturning. It is interesting because I have never seen this. Even asking other engineers and searching all around the web and my reference material, no one uses...
  17. jvvse

    Bad Connections - Sistering balcony joist with no back span?

    It seems like a quick fix and does not address the decay issue that caused the original balconies to fail. I have never seen a fix where they screw into the end grain of the existing joists. I think key (may I call you key?) had some good points and it can be validated, but it does make some...
  18. jvvse

    Etabs Response Spectrum Analysis - Walls attracting too much load

    Sorry for the late reply. I don't usually download and check models, but I made an exception and ETABS said it could not open the file. Oh well. :D If it's your first model, you have a lot to learn about modeling in general. Most engineers are not taught what they need to know and it can be...
  19. jvvse

    One large (80000 SF footprint) RC bldg designed & built as 7 separate bldgs

    Sorry for the late response, I've been busy. I don't think I have any more reasons than what I already mentioned. Summing up: --Separate permits (building was split up to speed up plan-check, design, or construction time). --Irregularities (you mentioned there were none, but unless the...
  20. jvvse

    Can we useda flat plate, with shear walls as LFRS in seismic zone 4 (UBC 97)

    You mean like Steel Plate Shear Walls? They are in the last few versions of the IBC and detailed in the latest edition of AISC Seismic Design Manual.

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