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  • Users: hemiv
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  1. hemiv

    Options for attaching checker floor plate to HSS beams

    I have inherited a project where 5/16" HSS is being used for an industrial platform which will be decked in checker plate. The HSS is already purchased. The previous designer had the floor plate field welded to HSS in overhead position. This is a hell of a lot of overhead welding, and think...
  2. hemiv

    Sawcut control joints in formed concrete?

    I've got a contractor that may not have placed control joint strips in his forms for a cantilever retaining wall... I don't believe I've had this issue before. Can joints be cut in after forms are removed in 2-3 days? I'm only familiar with slabs, and they of course get cut very soon after pour.
  3. hemiv

    Combined Wood and Steel Moment Frame

    I am working on an existing structure from the 80's which used steel tube columns and doubled light wood trusses designed for end moments. The columns have big flag plates welded to the top, and the top and bottom chords of the trusses are bolted to it. We have to modify this structure. We are...
  4. hemiv

    Firm Principals and Liability

    Is it possible for principals of a firm to be considered liable for errors or unethical activity of another principal? I’ve got a situation where I believe a principal is practicing outside of his expertise (and encroaching on mine). On the one hand, surely he is solely responsible since he is...
  5. hemiv

    Big Light Poles - UL Certification vs Structural Design

    I've got a project at a sports field which includes some 70' - 80' light poles. The electrical engineer spec'd Musco poles, and I have received some submittals from the contractor. In my specs, I asked for stamped pole shop drawings showing that they meet the project design criteria (I assumed...
  6. hemiv

    Code & Structural Alterations

    This is a follow up to a previous post I made about pre-engineered metal building modifications. This building is in SDC D. I am replacing existing rod bracing with a portal frame. The building was built in the 90s. Does the new frame need to meet current seismic detailing requirements? In...
  7. hemiv

    PEMB Modifications

    Hi all. I've been asked to provide a design allowing a PEMB owner to remove X bracing for new doors. I've done this before with chevron bracing and new beam, but this time the openings are going to be quite large and I don't have enough room for that. So I'm going with a new portal frame...
  8. hemiv

    A few questions on an old brick masonry project

    Hi all. I'm working on a small residential renovation project. This is a late 19th c. brick building. The project is on the interior of the building, and a lot of the walls are covered with gypsum board or painted. I've worked on similar buildings, but none with this much involvement with the...
  9. hemiv

    SE vs Architect license question

    Maybe some of you have been in this boat before. I am currently working alongside an architect as part of a design firm. We have been invited to give a proposal in a neighboring state (IL) for a small building. He has a license there, but I do not have the SE (PE only). However, reading the...
  10. hemiv

    Valley Rafter Repair

    I'm working on a repair detail for a 2-ply 2x12 valley rafter in an approx. 130 yr old story building. The rafter is undersized and each ply is split at some knots near the mid span. I think the best thing to do would be to replace or sister it, but that would require temporarily supporting...
  11. hemiv

    Mixed SFRS

    I'm working on a project where I've been asked to use multiple types of seismic force resisting systems. I have done this before in steel and conservatively chosen the lowest R value in ASCE 7 and still come up with pretty economical results. The building I'm currently working on will be...
  12. hemiv

    SE Exam Prep Courses

    I'm looking to take the SE exam in October 2022. I benefited greatly from taking a prep course for the PE exam. I'm looking to do the same this time around. I'm considering courses from School of PE, PPI, and NCSEA. The NCSEA courses seems to be lighter weight compared to the other two...
  13. hemiv

    Is IMF/SMF in both directions possible?

    Howdy all. Is it at all possible to do an IMF or SMF in two direction with WF beams and WF columns? No prequalified connections into WF column webs exist in AISC 358. It seems the only options are: [ol 1] Make all the columns cruciform Use the Conxtech connection in chapter 10 with square...
  14. hemiv

    Structural Engineering in Illinois

    Hi all. I'm licensed as PE in a few states for the company I work for, including Illinois. I was taking a look at the Structural Engineering Act, and wanted to confirm with some folks here that there are absolutely no exemptions to this act? I read in an IDFPR manual that single family homes...
  15. hemiv

    Experience when starting up a company

    Hi all. For those of you that own your own business - how many years of experience did you have when starting out, and what scale of projects were you working on? Did you feel skilled enough, or was there a lot of learning as you go? Did you wait too long or do you wish you had gained more...
  16. hemiv

    Basement Wall Pressures

    Hi all, I'm working on a little project to stabilize and push back my bowing basement wall. Going to go with an I-beam at 4-5' centers, with an angle foot plate anchored to the basement slab and an angle top piece connected to my joists. I'll have a bolt going through the top angle to apply...
  17. hemiv

    Soil Nails Through Existing Concrete

    Can soil nails be installed through existing reinforced concrete? Looking to tie down a slab from some significant uplift.
  18. hemiv

    Terzaghi, Theoretical Soil Mechanics, Article 70 question

    I read Article 70 this morning, and an equation is presented for the pressure on a tunnel crown "at a great depth below the surface." σv = [(γ*B1)/(Ktanф)] * [1-e^(-Ktanф(D1/B1))] + [γ*D2] * e^(-Ktanф(D1/B1)) In the paragraph below, Terzaghi writes "As soon as the height D1 becomes equal to...
  19. hemiv

    Horizontal Modulus of Subgrade Reaction

    I'm working on a problem where a retaining wall will be loaded toward the backfill, and I'm trying to come up with some deflections. I've created a model of this structure with a mesh of spring supports to simulate the backfill. I'm looking at the Das text Principles of Foundation Engineering...
  20. hemiv

    Mentors

    Hi all, This is a bit of a follow up to my last post about hoping to do some solo consulting in the future. I'm noticing a need for a mentor at this point in my engineer career. I'm working in a very niche heavy industrial type of structural engineering, but hope to steer towards building...

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