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  • Users: tweedledee
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  1. tweedledee

    vibration criteria for hospitals

    Does anyone know of a reference for the vibration limits of a hospital floor? I have a reinforced concrete flat slab floor. Also, can anyone tell me how the check the floor for vibrations. I have an FE program but it doesn’t check for vibrations. any help is much appreciated
  2. tweedledee

    how many weld passes does it take?

    Hi, Does anyone know of a table that would tell me how many passes it would take to get a weld of various sizes? I.e. how many passes for a 1/2" weld,.. and how many passes for a 5/8" weld.. etc... I'm an engineer and I spec welds all the time, but havent (until now), given much thought to the...
  3. tweedledee

    Autodesc 2004 - batch plot

    Can Autodesc 2004 do a batch plot??? Is it possible to send multiple drawings to the plotter in one swoop???? Ive heard that there is software that can let you plot multiple sheets.I wouild love to know how to do this. I have a project with 50 sheets, and when im plotting, i have to open each...
  4. tweedledee

    Teak wood structural properties

    Does anyone know what the structural properties of teak wood are?? I'm looking for Fb, Fv, Fc, E. I cant find this in the NDS book. I dont know if there is a similar wood to teak that I can use. Any ideas?? Thanks in advanse. T
  5. tweedledee

    weight of vines / vegetation

    hi, I'm designing a small structure to support climbing vines. Does anyone know of a reference for such loads??
  6. tweedledee

    moving combo box???

    I have a combo box in my excel spreadsheet. the calcs work fine. BUT every time i send the document to print, the combo box moves across to the left of the screen. if i print 5 times the combo box will move 5 times until it reaches the very left of the scren?? this is weird? does anybody know...
  7. tweedledee

    column splice with moment + 90 degrees orientation

    I have column splice between two columns orientated at 90 degrees to one another (strong axis to weak axis). I also have a moment of 150 ft-kips. Does anyone know of a reference that has a good example of this. Thanks in advanse T
  8. tweedledee

    web crippling of a W-Beam encased in concrete ??

    If a wide flanged beam is encased in concrete (no mesh so I cant consider it composite), do I need to check for web crippling, and web yielding for the concentrated load on the beam? Is there any reference out there that covers this?? Thanks
  9. tweedledee

    Make an Existing non-composite beam act composite?

    Have any of you guys modified an existing non composite steel beam with existing concrete slab on it so as to make the beam act Composite with the concrete?? I have heard of a way of coring out the concrete down to the top of the beam flange, welding on studs, and placing non-shrink grout in...
  10. tweedledee

    ANSI Standard for Coupon testing

    Does anyone know of the ANSI Standard for Coupon testing of existing steel members?? I want to get my hands on the standard but I dont know the reference number Any help is apreciated I posted this in the materials section, but had no replies.
  11. tweedledee

    ANSI Standard for Coupon testing

    Does anyone know of the ANSI Standard for Coupon testing of existing steel members?? I've heard that it is based on teh standard deviation of preliminary samples. I want to get my hands on the standard but I dont know the number? Any help is apreciated
  12. tweedledee

    Post Tensioned Slab Failure. test recomendations??

    I'm working on a building that was built in 1970. It has a basement post tensioned slab. The building is near the sea, so in high tides the water table is higher than the slab. The slab was designed for upward pressure, but apparently not enough because the slab has been leaking since the 1990's...
  13. tweedledee

    Tempered Glass- E value, and tensile strength??

    Hi, I want to design a tempered glass shelf and I need to know the elastic section modulus, and the allowable tensile strength. Any help would be greatly apreciated td
  14. tweedledee

    plexi glass structural properties

    Does anyone have info on the structural properties of plexi glass? much apreciated
  15. tweedledee

    Perforated shear wall, not 8ft or 10ft

    For perforated shear wall design, The IBC gives adjusted shear values in table 2305.3.7.2. The table has two wall heights, 8ft, and 10ft. What if the walls are not 8ft or 10ft??? Am I missing something?
  16. tweedledee

    What Building Code Is Used In New York City??

    Hi, Can anyone tell me what Building Code Is Used In New York City?? Another forum indicated it was a modified version of the 2000 IBC. Is there an actual State Building Code, like there is in Massachusetts, or do they use parts of one code and reference you to a different code? Where can I...
  17. tweedledee

    MA Structural Engineer wants to work to New york

    I've worked as a structural Engineer in a small design office in Massachusetts for five years. I’ve been here since I graduated college. All of my projects are in Massachusetts and I don't have any experience with New York building standards/codes. I don't even know what code they use? I think...
  18. tweedledee

    Massachusetts Building Code: load combinations

    The Massachusetts Building Code gives 7 load combinations for ASD. Does anyone know what the "-" sign is for in combinations 5 and 6. The combinations are as follows: 1. Dead 2. Dead + floor live + roof live (or snow) 3. Dead + floor live + 0.5 roof live + wind 4. Dead + floor live + roof...
  19. tweedledee

    Resume - Is it standard to identify your current employer??

    Is it standard to identify your current employer on your resume?. My boss has been around for a while, and is fairly well known by other Engineering companies here in Boston. I'm applying for new jobs, and obviously I don’t want him to know. I know that if I make it to the interview, the new...
  20. tweedledee

    single equal angle bending with tip in tension - ASD

    Hi, I need help understanding the specification for single angle bending in the ASD. The ASD section 5.2.2 says that for an unbraced equal angle with the tip of the leg in tension, that "Fb is determined only by section 5.1.2". 5.1.2 indicates Fb=0.66Fy. Does this mean that we do not need to...

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