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  1. druminman

    Light Gage Studs Bearing on Roof Deck

    For heavily loaded walls, we place 6" channels "toes down" over the flutes and weld them to the supports below. For walls parallel to the deck flutes (perpendicular to the joists), use a continuous channel (or two if you can't locate the wall well with one). For walls perpendicular to the deck...
  2. druminman

    Historic Masonry Repair Article?

    That's the article I was looking for! Thanks Dik!
  3. druminman

    Historic Masonry Repair Article?

    Thanks a lot for the suggestion, Slta. Those are great, and I use them as a reference often, but I was hoping for something more succinct that just provided the basics.
  4. druminman

    Historic Masonry Repair Article?

    We frequently get calls to evaluate various problems with older load bearing brick masonry structures, and more often than not, one of the problems is the use of modern cement mortar when re-pointing. Typically, our scope is not such that I can offer solutions beyond "consult a mason familiar...
  5. druminman

    Lateral Load from Snow Drifted at a parapet

    Thanks to all for the responses. BA, I agree that there must be some load, but I'm a little surprised at the apparently complete lack of guidance in the literature. One would think if the affects were minimal, that the codes would at least claim this if no rational procedure existed for...
  6. druminman

    Lateral Load from Snow Drifted at a parapet

    I thought of that too, Mike, but 70 psf snow is just over a foot deep IF it all melts and doesn't run off. That equates to 70 psf lateral load (max) at the base of the wall decreasing to zero one foot up. On an 18' wall I'm sure this condition won't control. I know the structure is...
  7. druminman

    Lateral Load from Snow Drifted at a parapet

    I am working on a job where there are narrow cavities created at the roof between a parapet and a higher tower-like structure. The snow drift in this cavity is around 70 psf. I did not do the design, but am working with a specialty material supplier. The design calls for VERY large members in...
  8. druminman

    Masonry Text for PE Exam

    VAStrEngr, do you have a link to those "cheat sheets"? I've seen them and they are handy, but I can't locate them by Google search. Searching "Codemasters" gets me video games. :) Thanks!
  9. druminman

    Heavy Timber Beam Testing

    The ASTM tests must be conducted on specimens completely free of all defects, with straight grain. There is a correction for slope of grain. This requirement makes getting a representative sample somewhat more realistic, as one only needs to assure themselves that all of the beams in the...
  10. druminman

    Collapsed porch for Cleveland Double

    I've worked on some condo projects where "protected" LVL beams have completely failed after only 4-5 years. I'll never use them again for porch or deck construction. There are companies making glue-lams from pressure treated, kiln dried material that I specify when a solid sawn timber or...
  11. druminman

    Single plate moment connection

    Moments are up to 30 k-ft on 12-16" deep beams -- not very small by my estimation :) Thanks for your input. I'm not even sure how one would go about verifying the stress transfer from the flanges to this plate short of a solid model.
  12. druminman

    Single plate moment connection

    I am reviewing some moment connections that were submitted to me and there is an unusual moment connection that I have essentially rejected, but wanted to get the opinion of you guys on. The connection is a WF beam to an HSS column, and the designers used what is essentially a large shear plate...
  13. druminman

    Timber Stud Wall Deflection Head Detail

    Typically, the ceiling wallboard is not fastened to the floor or roof framing withing 18" of the partition and is fastened to blocking attached to the top of the partition. Simpson has detiails.
  14. druminman

    Steel lintel

    Due to the prolific inclusion of control joints in masonry veneers, I don't consider the arching action any longer. I've seen large openings with a control joint at each side of an opening as well as smaller openings near a corner with a control joint on the opposite side. In this case no arch...
  15. druminman

    Simple Method for 2-Way Plates?

    Thanks for the quick replies! I have ordered the book you mentioned, YS.
  16. druminman

    Simple Method for 2-Way Plates?

    Does anyone have or use a simple method for rectangular or (less importantly) circular plates with either uniform or single concentrated force (normal, axial, or moment)? It seems these conditions turn up often in different small jobs, where a full on analysis is not justified, and I oversize...
  17. druminman

    Wood "Hardness"

    My instinct would be that testing of resistance due to impact from projectiles would be good for comparison. These tests are done with respect to preventing damage due to hurricanes, perhaps by FEMA or someone working for them. I've no experience other than having seen footage of a test...
  18. druminman

    Shrinkage analysis

    One thing to keep in mind with prestressed members is that creep strains will not be uniform on the cross section, and will also result in a loss of prestress which will increase deflections beyond those calculated. Shrinkage is approximately uniform if the drying is uniform, but not so if the...
  19. druminman

    shrinkage of slabs

    Teguci, Linear length change due to sustained load (compressive or tensile) is creep, not shrinkage. The phenomena for creep and shrinkage are similar, but not inclusive, and both are dependent significantly on time and environmental conditions. ACI209 provides guidelines for estimating...
  20. druminman

    Strain from rosettes using tensors?

    "Experimental Stress Analysis" by Daily is an excellent source for stress analysis methods. I'm pretty sure it can still be had new, but an older edition would suffice (the analysis hasn't changed since the days of Euler) and cost significantly less.

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