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  1. beamer

    Good Online Book Seller - Structural Books

    Thanks all for the suggestions. I have been using pdfs of some codes and the word search helps out quite a bit. Half Price Books has been great to find older text books and I've found some good ones. What I'm looking for is a site that has all of the various codes, texts, etc. There used to be...
  2. beamer

    Good Online Book Seller - Structural Books

    Hi All - Looking for a good online bookseller that isn't Amazon. Don't mind them but would like a more engineering oriented shop with a wider selection. Mostly looking for structural books. Suggestions? Thanks
  3. beamer

    Damping Ratio in ASCE 7-02

    Thanks! The 1 to 1.5% for steel is what I was looking for.
  4. beamer

    Damping Ratio in ASCE 7-02

    I am currently working through the Gust Effect Factor in ASCE 7-02 and am stuck on the Damping Ratio in section 6.5.8.2. I haven't been able to find a good definition for this or a reference to use. So the question is - Where can I go to find what value I should use for various structures? Thanks!
  5. beamer

    Old Roof Purlin Material

    I ended up using 30 ksi for the steel material. I did talk with a couple of "experienced" engineers and they both agreed that 30 ksi or 36 ksi is probably what was used, but they also said that that was, at the time, the lowest strength steel used at the time. I felt pretty good using 30 ksi.
  6. beamer

    Footing tie beam requiremets

    Thanks. I found the section in the 2000IBC that requires tie beams or something with a load modification for seismic zones D, E and F. If we try really hard, we might be able to get to zone C, but nothing this high. I haven't found any other code requirements.
  7. beamer

    Footing tie beam requiremets

    Single story conventional steel with spread footings. Soil is typically an expansive clay with the potential of sand layers. Bed rock is anywhere from 10 feet to 50 feet below the surface. Perimeter is supported by grade beams.
  8. beamer

    Straigthening of Railroad rails

    My father is a an old railroad man and he would probably tell you to get new rail. A couple of problems. 1. You can heat the rail to bring it back to straight, but you will have a difficult time making it completely straight. It also requires condsideration into the air temperature. Hot and...
  9. beamer

    Footing tie beam requiremets

    Does anyone know of any code requirements that a building have tie beams between spread footings? We were asked recently why one of our buidlings didn't have tie beams between the spread footings by a reviewer. We moved past this issue too fast to talk about it, but it is one of the odd comments...
  10. beamer

    Wood Blocking under Steel Columns in Freezer Structure

    The insulation on the column will only work if you take it to the roof and provide a heat source. You still run the risk of sweating on the column. If the heating system is not in place yet, see if additional heating can be provided over the footing. Talk with the heating system designer about...
  11. beamer

    Wood Blocking under Steel Columns in Freezer Structure

    The wood blocking takes the place of the insulation that has to be omitted under the column base plate. We continue to use this detail even if it is heated. If you don't separate the column and footing, the cold will transmit through the column and into the unheated footing and freeze the soil...
  12. beamer

    Would you recommend engineering to a recent high school graduate?

    I've read the posts with interest because I am at a point in my life where I am considering leaving the engineering field. I am a 33 year old structural engineer working for a consulting engineering firm in the middle of America. The economy has finally caught up with the construction industry...
  13. beamer

    Vapor Barrier Transmission Rate

    I am looking for a reference either by an organization or a maunfacturer that states what the vapor transmission rate (perms) is for a 6 mil reinforced polyethylene sheet. The only one I have been able to find is for unreinforced in ASTM and I need to know if the reinforcing makes a difference...
  14. beamer

    Metal Stud and Gyp Wall Movement

    Hi, I have a project were the gyp sub attached the walls to metal building columns. We required that they maintain space around the columns to allow building movement. The question-are there any guidelines for allowable movement in gyp board walls? The walls are both parallel and perpendicular...
  15. beamer

    Old Roof Purlin Material

    I am looking at the load capacity of roof purlins on a pre-engineered metal building. The building was constructed in the early 70's. The metal building company no longer exists and the city and owner do not have drawings. What I need to know is what was the predominate steel material used. Does...
  16. beamer

    Leveling nuts affecting tensile capacity of anchor bolts.

    There is nothing special about the bolts. A36, snug tight. No pretensioning of the bolt required.
  17. beamer

    Leveling nuts affecting tensile capacity of anchor bolts.

    I have an engineer in our office who has been told the statement that leveling nuts under a building column base plate should not be used if the anchor bolts are intended to take tension loads. Is this an AISC or OSHA issue or some other requirement? We don't know how to respond to this...
  18. beamer

    Structural Analysis/Design Programs and Literature

    We have had success using PCA-Wall for tilt-up design. For general software, the easiest I have found are Enercalc and Risa. I just received Risa 2D for Windows. Hope it works as well as the DOS version.
  19. beamer

    Concrete Tilt-Up Drawings

    Thanks for both of your resonses. We have worked with Dayton Superior and they were one of the designers that said we were providing the "Cadillac". Our problem is that we are currently offering the client a very good set of tilt-up drawings, but that the fees that go along with that...
  20. beamer

    Concrete Tilt-Up Drawings

    We are fairly new at designing tilt-up panels and how our drawings were set up were based on requirements from the contractor that we were teamed with. The contractor wanted to see every panel that was remotely different from the rest and wanted reinforcing, embed plates, reveals, panel...

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