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  • Users: whyun
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  1. whyun

    Steel Tips

    I have a copy of "Seismic Design Practice for Steel Buildings" by Roy Becker, Farzad Naeim and Edward J. Teal dated August 1988, published as Steel Tips by the Steel Committee of California. The SSEC website has pdfs of all Steel Tips available for download but this particular one is not on...
  2. whyun

    Everything you wanted to know about organizing, but were afraid to ask

    There was a thread about how to manage job related material collected over time, whether it be hard copies or computer files. I would like to get some input from others regarding organization of computer files (especially pdf's), specifically, directory naming convention and topic categories...
  3. whyun

    New Daylight Savings Time

    We have IT guys working on the work computersto handle the shift in the daylight savings time but how do you fix it on the home computer? I manually changed one hour forward but in April (when the old daylight savings kicks in), I have to go back one hour.
  4. whyun

    NASA World Wind

    I just test drove the World Wind software by NASA. It is quite amazing. Link to the site is http://worldwind.arc.nasa.gov/ Quite a large file for dialup folks, but if you have broadband, its worth the effort. I would like to see further discussion on how this concept will evolve over the...
  5. whyun

    Disciplines where Licensure shall be a Requirement

    "Are Pseudo Engineers Common?" has been a very popular thread which I've enjoyed reading for several months. SHall we discuss, now, what disciplines SHALL require licensure? I am a structural engineer in design of building structures and my opinion is that my discipline directly affects public...
  6. whyun

    Non-Composite Metal Deck Attachment Using Screws

    Traditionally, metal decks have been attached to steel support members which resist wind uplift (at roof) and diaphragm shears from lateral forces. In more recent times, screwed decks are becoming more and more popular due to much easier installation. There are a few ICBO reports (ICC Reports)...
  7. whyun

    Old AISC Light Beam (B) Section Properties

    I have an old structure and the existing structural drawing calls for a beam section 18B40. I have looked into my AISC STeel Manual 6th Edition and found that it is not listed under the "light beam" section nor the WF section. In fact, I was unable to find any 18" beams with 40 plf weight...
  8. whyun

    Old Riverside Steel Catalog

    I would like to know where I can find a pdf of an old Riverside Steel Catalog that has design tables for tapered steel girders. If there is a fabricator who published a similar catalog, it would help also. Thank you all.
  9. whyun

    Grouted Masonry Walls in California

    This is a question for engineers familiar with 2001 California Building Code. Someone took my 2001CBC and I only have access to my old 1997UBC. For masonry construction, does the 2001 CBC require that all cells (regardless of whether the cells contain vertical reinforcement) to be grouted? In...
  10. whyun

    Wind Uplift

    What is the method of calculating an uplift capacity of a single 1/2" or 3/4" puddle weld from a metal deck to a steel members subject to a net uplift force due to wind. Say calculated wind uplift is 40 psf, DL on the deck is 15 psf, deck is 20 ga B-Deck (1 1/2"), welds are at...
  11. whyun

    Combined Stresses: Torsion plus bending

    AISC Steel Manual (ASD) 9th Edition Chapter H talks about checking combined stresses due to bi-axial bending and axial loads. Given that a member is subject to bi-axial bending and torsion, and pure torsional stress is obtained, what should be the combined stress check equation? What about...
  12. whyun

    Camber in Steel Beams

    I would like to start a thread about cambering of steel members. Following are my general guidelines in cambering but if anyone has a different opinion or have other considerations, please feel free to contribute. 1. typically use 75% of precomposite dead load on a floor beam to calculate...
  13. whyun

    Industrial Facilities

    ASCE held a seminar last week (May 15-16) on "Structural Design of Industrial Facilities" in Los Angeles. I didn't go due to the high registration fee (over $1000). Does anyone know of a good reference book that covers a similar topic? I am interested in Train/Bus maintenance...
  14. whyun

    How to handle "See Structural Drawings"

    Just for fun, I was curious how others handle the infamous phrase "See Structural Drawings" stated in other discipline's drawings without coordination.
  15. whyun

    Arizona Requirements

    I have some site specific questions for a project in Phoenix, Arizona. 1. Does City of Phoenix allow the use of steel ordinary moment resisting frame (OMRF) for lateral system? 2. Phoenix is in Zone 1. I was told by a local geotechical engineer that for the base shear calcs, use Z = 0.075...
  16. whyun

    Transfer Diaphragm

    I am looking at building to be designed under 1998 California Building Code Volume 2B (1994 UBC with California amendments). Building consists of a core tower say 130 feet by 155 feet - 5 stories. At the Main Level (1st floor), the building footprint is larger. Say 30 feet southward and 30...
  17. whyun

    1997 UBC Collector Element Design

    In the 1997 UBC, we are asked to use the special load combination (which is at omega level force) for a column supporting a discontinuous lateral system (vertical irregularity) using a allowable stress increase of 1.7 times the load duration factor (1.33 for seismic). Similar requirement exists...
  18. whyun

    Wire Studs

    In lieu of metal studs, one can find wire studs used as partition walls in older buildings. Wire stud is made of thin gage angle (say 1"x1"x20gage) for flanges and bent wires as webs welded to the flange angles. This type of studs have been discontinued after WWII but surplus may...
  19. whyun

    Flag Pole

    In designing flag poles for the post and the foundation, one must consider wind forces on the pole as well as wind forces on the flag. If the flag dimension is known, we must consider a certain percentage of the flag area to catch wind drag force. I am not aware of a specific code section (in...
  20. whyun

    Any ICBO Approved Masonry Anchors???

    There are many ICBO approved anchors (i.e. expansion type anchors and epoxy type) for concrete; however, it is so difficult to find such approval for masonry (or brick) application. Years back, there were bolts such as Redhead Dynabolts that had ICBO approval but lately it has been removed...

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