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  1. j19

    American Buildings Company ca. 1995

    For built-up straight and tapered members, I can confirm that in the mid-90's American Buildings Co used 55 ksi yield flanges up through about 12" x 1". Larger than that was usually 50 ksi. I don't remember exactly where the split in web yield strengths was at but I think that all webs less...
  2. j19

    Shim Plates

    Section 5.1 of the 2014 RCSC gives guidance on what to do when you have shims less than or equal to 1/4" and shims > 1/4".
  3. j19

    Purlin Outwards Capacity vs "No Cladding" capacity?

    No, you shouldn't use those factors if you don't have cladding. The Spec also has a list of criteria that the cladding has to meet in order to be able to use the factors. If you don't have cladding for your situation I assume you will have some type of bridging between the purlins?
  4. j19

    Purlin Outwards Capacity vs "No Cladding" capacity?

    The AISI Specs have procedures on how to design a zee or cee for uplift loads when there are through-fastened cladding panels attached to the outside (tension) flange. For example, for an 8" deep simple span zee there is a reduction factor of 0.65. More than likely the purlin manufacturer used...
  5. j19

    CJP - Complete Joint Penetration Welds

    When splicing a pipe column I've seen (actually I haven't seen this but I have heard of it) weld shops cut off a short piece of the pipe (maybe 4" long) and they cut a slit in it (in the 4" direction). Then they fold the piece together until it will fit inside the end of the pipe column...
  6. j19

    Metal Building Foudnation Design

    SteelPE - You are preaching to the choir. I don't do very many metal bldg. foundation designs but almost without exception the owner will question the footing sizes when the contractor tells him that they are too big. I've gotten to where I tell the owner that if he had decided to have the...
  7. j19

    Disassociating Yourself from a Project

    In an earlier thread (http://www.eng-tips.com/viewthread.cfm?qid=423280) I described a situation where the contractor did not construct a foundation for a metal building in accordance with the drawings that I had provided to him and the owner. The contractor left out a key element that impacts...
  8. j19

    Metal Building Foundation Repair

    Update: I met with the owner on Monday and gave him "the talk". I explained to him the importance of the tie-rods, why they are needed and discussed some repair options etc. etc. (I wrote a thorough recap for my files.) He seemed very receptive to my concerns, although he did ask a couple of...
  9. j19

    Metal Building Foundation Repair

    darthsoilsguy2: The building is on a sloped lot and on the other side of the building the slab is a little less than 1' above grade.
  10. j19

    Metal Building Foundation Repair

    Wow! Thanks for all of the responses. I'm away from my notes but here's some info: The is a gable building, 120' wide, clear span with either 10' or 12' eave heights. The reactions from the MB manufacturer show that under Dead + Collateral + Live Load the kickout is around 40 kips. By "do...
  11. j19

    Metal Building Foundation Repair

    I'm looking for some ideas on how to "repair" a new foundation for a metal building. The building is wide with a low eave height so the kickout forces exceed what can be resisted by hairpins so I designed tie-rods that run from footing to footing. The footings are spread footings with about a...
  12. j19

    rod x-bracing connection to web with hillside washer

    Maybe the attached will provide some info that you can use.http://files.engineering.com/getfile.aspx?folder=bb25ee8a-5cc5-4405-9137-de72d9be9b21&file=Bracing_Anchorage_Sinno_Report.pdf
  13. j19

    Is a TEK5 In 22 or 24 Gage Reasonable / Possible?

    Check out the Ultra-Z fastener from Atlas. Their product data sheet shows that it is available in various drill points with lengths up to 8". http://www.atlasfasteners.com/images/Ultra-Z-TechData.pdf
  14. j19

    Need to determine capacity of steel assembly through testing - how many tests?

    Take a look at Chapter F (Tests for Special Cases) in AISI S100, or NASPEC. It gives guidance on how many tests to run based on the variation in your results and also how to calculate a safety factor. However, since you will be testing lugs then I don't think I would depend on the AISI...
  15. j19

    Steel Joists Bearing on Masonry Wall

    I'm looking at Section 5.3(a) in the SJI Standard Specifications and trying to wrap my head around the bearing requirements of steel joists on masonry walls. It says (in my words) that the joist shall extend not less than 4" over the masonry support and that the steel bearing plate can extend...
  16. j19

    FM Global Wind uplift

    The 1-28 data sheet is only applicable to: 1. Building components and cladding and their immediate supports (wall siding, roof assemblies, etc.) 2. Opening protection (doors, windows, etc.)" The following sentence is at the bottom of 1-28's page 6: a) Use an importance factor of 1.15 for...
  17. j19

    Wind drift limitations

    Take a look at AISC Design Guide 3. It recommends using a 10-year wind recurrence interval for determing drift, I doubt you would want to go less than that even if it is an agricultural building.
  18. j19

    Steel Beam Flange Out of Square

    I'm reviewing a three plate steel beam that was fabricated with one of the flanges not square to the web. It is a 12" wide flange and when I put a framing square against the web the tip of the flange is off by about 3/8" (3/8" across a 6" distance). If I remember correctly, the AISC tolerance...
  19. j19

    F1852 Tension Control Bolts

    An owner has requested the use of TC bolts on a project, but if I use the most economical connections the erector will not be able to get the special wrench (not even the S-80EZA short barrel wrench) to fit on one of the rows of bolts in a connection that has several rows of bolts. 1) Is it ok...
  20. j19

    Snow guards (Sno-Fence) on large metal building - worth it?

    OHIOMatt makes a good point about making sure that the metal bldg supplier is ok with putting the snow guards on the roof. One other thing, I think most snow guard suppliers think of their guards as part of an "system", which would probably include several rows of guards spaced several feet...

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