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  1. PMR06

    How to prevent model view from automatically displaying results after a model run?!

    Anyone know how to prevent SAP from updating the model view with results after an analysis run (deflected shape or member force diagrams). I have a large model with numerous load combinations. After an analysis run, the display can take FOREVER to update the 3D view with whatever I was last...
  2. PMR06

    Lateral earth pressure from partial height backfill

    I am working on a temporary wall shoring project in which the contractor needs to brace a basement wall until 2nd floor structure is installed (they need to backfill now so that other work can proceed) Step 1: With the basement floor slab in place, the EOR has given them permission to partially...
  3. PMR06

    Diaphragm Question

    I have a project in which I am designing precast concrete shear walls for loads given by an EOR. The only attachment of roof deck to walls is with a ledger angle at the wall only. No other collectors or drag struts are provided. I've created a simplified illustration for discussion purposes...
  4. PMR06

    ACI Deep beam + torsion

    Does anyone know of a design guide, ACI code reference, or other information regarding concrete deep beams with torsion? In particular, I am looking for guidance on combining the minimum areas of vertical/horizontal steel from deep beam with the longitudinal/stirrup steel from a torsion...
  5. PMR06

    Vertical Axis Orientation

    I'm currently evaluating RISAFLoor trial. I'm a longtime user of RISA3D and I've always had an OCD for wanting Z axis vertical. Any way to do that in RISAFloor? Doesn't seem to be in Global Parameters, help file, etc. Thanks in advance
  6. PMR06

    TC bolts with splines not removed

    As I'm sure you all do, I always look up at the ceiling of buildings, especially when structure is exposed, just to see what others are up to. Recently I've noticed many finished, occupied buildings with TC bolts that do not have the splines removed. They are round, dome-headed bolts in shear...
  7. PMR06

    Delegated Engineer's responsibility to the rest of the project...

    We have a project in house to design steel stairs for a building that was designed by others. The building is a school located in a high seismic region: SDC D, special moment frames, site Class E, and high importance. As I've been looking thru the structural drawings to figure out what our...
  8. PMR06

    Moving load - accurate start and stop behavior

    Does anyone know of a way to "start/stop" a moving load in such a way that represents the physical extents the moving load would start and stop from. Currently the moving load just appears out of space and starts rolling down the structure, then rolls entirely off. In reality (a bridge crane...
  9. PMR06

    Conflict of Interest Question

    I have a potential conflict of interest scenario: My grandfather's house was damaged by flood and my family has asked if I could write and seal a letter stating the flood caused damage and needs demo/replaced... all of which I am completely comfortable stating and any other engineer would...
  10. PMR06

    Slotted Holes & Eccentrically Loaded Bolt Group

    I have an office debate I would love to hear opinions on: Slotted holes may be used without being slip-critical if the load direction is perpendicular to the slot. Does that imply that the eccentrically loaded bolt group table 7-7 for 0 degrees is valid with slotted holes? (load is applied...
  11. PMR06

    Prevent Area Load on Some Members?

    Is it possible to have an area load NOT load some members? For example, I have horizontal bracing in some bays co-planar with the beams and girders. I would like the area loads to distribute to beams and girders only and not to the horizontal bracing.
  12. PMR06

    Shear friction dowel action

    Question: Per ACI R11.7.4.3, one can use mu=0.6 for shear resistance primarily due to dowel action of the reinforcement. Does the reinforcement still need to be developed on both sides? Is the 0.6 basically saying the dowels will be shearing (not in tension)? Background: (See attached...
  13. PMR06

    Roof Pressure in Design Wind Load Cases

    Reference ASCE 7-05 Figure 6-9 "Design Wind Load Cases", specifically Cases 3. They do not mention roof wind. In Case 3, are the roof suctions additive such that the roof would be designed for (0.75 + 0.75)P = 1.50P?
  14. PMR06

    Envelope Solution - Member Bending-Unity View

    I've got a large steel frame model with 28 load combos. Is there a way to view the model with member unity under an envelope solution? I could have sworn there was, but I cannot get it to show! Thanks in advance Josh! :)
  15. PMR06

    Structural Library FAQ Survey

    I am thinking about compiling a FAQ for structural reference library. I keep coming back to searching for recommendations on texts and end up scrolling thru multiple old posts. My thought was to compile the list into the following categories: Analysis/Mechanics Dynamics/Seismic Steel Concrete...
  16. PMR06

    Long I or Short?

    I've always wondered, do you pronounce the I long or short? I've heard both. JoshPlum, you'll be the official answer.
  17. PMR06

    Excel - Find external links

    I've got a spreadsheet that upon opening says contains links to other data sources. I don't remember ever linking to other data sources though. Does anyone know of a way to locate cells that may have such a link. The spreadsheet has 3 tabs each containing many cells of calculations so...
  18. PMR06

    R=3 braced frame workpoint alignment

    In AISC 341-05 for an R=3 braced frame, the code says the frames should be arranged such that the centerlines of the framing members coincide or nearly coincide, thus eliminating the majority of flexure that might occur... Does anyone know what "nearly coincide" means? I.E. how far from...
  19. PMR06

    Coming soon to ASCE7 - Tae Bo loading

    Apparently Tae Bo exercises on the 12th floor of this 39 story building caused the "tremors" that resulted in evacuation. http://news.blogs.cnn.com/2011/07/19/scientist-tae-bo-workout-sent-skyscraper-shaking/?hpt=hp_t2
  20. PMR06

    Hawaii Wind - Kd Values

    In the Hawaii building code, tables 1609.3.4a... define the directionality factor Kd to be used for various buildings. Does anyone know of a commentary or an explicit definition for "Main Wind Force Resisting Systems with totally independent systems in each orthogonal direction"? For our...

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