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  1. warrenw

    Flare Tip

    Check out Flaregas Corperation at Flaregas.com, they will be able to help you out with a smokeless flare tip.
  2. warrenw

    Sample problems 1, 2 & 3 of part 2 AISC 8th ed.

    On example #2 the compression flange is now braced at 9ft which is too far for the member to be consider compact. Lc = 7.4ft < 9.0ft.
  3. warrenw

    Sample problems 1, 2 &amp; 3 of part 2 AISC 8th ed.

    fxp This is the way I understand it. AISC ASD limits plastic design to steels with yield strength up to 65ksi. Example #1(36ksi material) had a f'y greater than 65 which is wht the column had a dash (-) instead of a number. You will notice there is no number greater than 65. If the f'y had been...
  4. warrenw

    Guyed tower turnbuckle design

    apsix A factor of safety of 3 (breaking strength/working load) is a resonable number for wire rope used for a guy supported structures. The turnbuckle and all the rope hardware should have atleast the same capacity as the rope.
  5. warrenw

    Aspect Ratio of Small Tower

    jike I agree with you. 7'-6" seems just fine for a starting point. I would assume that the overall size of the structure will be governed by the platform geometry and then the members will be sized for the wind and D.L.
  6. warrenw

    Dynamic Lift Load Factors

    asixth: I don't know what "designing the cage to LSD" means so what I say may not apply. So for what it is worth; ASME B30.20-1999 "Below-the-Hook Lifting Devices" Chapter 20-1 Structural and Mechanical Lifting Devices "The load bearing structural components of a lifter shall be designed to...
  7. warrenw

    below the hook questions

    bnrg I don't have ASME BTH-1-2005, but I think they are saying that the member is loaded in a manor that causes the member to bend about it's strong axis, not that the load is acting in that direction. "loaded in the plane of the minor axis" means the the load is acting in the "y" axis causing...
  8. warrenw

    Support Lug Calcs per Bednar

    julesomar I agree with you. It looks like the example is wrong, the free edge "b" dimension should have been 15".
  9. warrenw

    Value of z for wind per ASCE 7

    jaydees I have always interpreted the meaning of (z) to be the height where you apply the wind force. If you have a 40ft tank, your velocity pressure (qz) varies with height. At 20ft (z) = 20, at 40ft (z) = 40. This gives you a different velocity pressure exposure coefficient (Kz) at different...
  10. warrenw

    guy cable grip/puller

    I checked out Crosby and they don't seem to have what I'm looking for. Thanks anyway.
  11. warrenw

    Bracing and Secondary Members

    JLNJ I think you answered your own question when you called it a "main compression diagonal"
  12. warrenw

    guy cable grip/puller

    I have a 1" diam. bridge strand that is being used as a guy cable that needs to be pre-tensioned to 23,500 lbs. Because of the connection geometry, I need to grab the 1" bridge strand and pull it up to the pre-tension load. I have searched and found Klein Tools - Chicago Grips, but they seem to...
  13. warrenw

    Saddle Design - Stress values?

    I have the tenth edition and S4 = -18,279 psi
  14. warrenw

    Pretension Load for Guy Wire Supported Flare Stack

    cdi12 We use Galvanized Bridge Strand for the guy ropes on our Stacks which are pre-stretched by the manufacture to eliminate most of the construction stretch. The initial pretension that we use is nominally 4.5% of the breaking strength with a minimum of 2.5% in the most unfavorable cold...
  15. warrenw

    ASCE 7-88 wind speeds

    Looks like Basic Wind Speed of 70mph (fastest-mile) from Fig.1 of ASCE 7-88
  16. warrenw

    Another Wind Load Question

    jmendler: I have a table from Florida 2004 Statewide Emergency Shelter Plan - Table G-1. Equivalent Basic Wind Speeds. Saffir-Simpson Hurricane Intensity Scale: Hurricane Category 1 = ASCE-7 90mph (3-second Gust) = 75mph Fastest-Mile = 74mph 1-minute Sustained Hurricane Category 2 = ASCE-7...
  17. warrenw

    UBC Table 23-II-B-2

    I'm not familiar with wood design but it looks like UBC 1997 has a Table 23-II-B-1 -Nailing Schedule and a separate Table 23-II-B-2 -Wood Structural Panel Roof Sheathing Nailing Schedule. The IBC 2003 seems to have combined the two into one Table 2304.9.1 - Fastening Schedule. Connection number...
  18. warrenw

    ASCE 7 Section 7.3.4 (Min. pf)

    STR04 Since no one answered you,I'll give it a try. This is the way I read it; Eq.7-1 Flat Roof Snow Load: pf = 0.7(Ce)(Ct)(I)(pg) where pg = 50psf but not less than 20(I) Your slope(hip roof) is 14.03 deg. which is greater than (70/W) + 0.5 = 7.5 Therefore use Eq. 7-2 Sloped Roof Snow...
  19. warrenw

    Nozzle Loads

    DSB123, I checked to make sure my Dyslexia haddn't kicked in, it IS API 560 Section 5 that lists allowable nozzle loads. Once in a while one of our clints will requests that our nozzles be designed to these load. I just thought this may be of some use for jcfoley.
  20. warrenw

    I need to find the DIN spec for Unalloyed structural steel?

    Maybe this link will help: http://www.mesteel.com/cgi-bin/w3-msql/goto.htm?url=http://www.mesteel.com/info/qualities.htm

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