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  • Users: mikek396
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  1. mikek396

    Column Bracing - Stiffness Check

    I have a beam acting as point bracing for 3 columns with relatively light loading. Using Appendix 6 - A-6-3, I have calculated the required brace force for each column (.01*P), and using A-6-4b, I have calculated the stiffness required for each individual brace. My question has 2 parts: 1 - How...
  2. mikek396

    Anchorage Design for Basement Elevator

    I am looking for some help with design of anchorage for a basement elevator machine replacement. The current machine has (4) 3/4 anchor bolts, and not in the correct locations for the new machine. New design loading will be approximately 26k sustained tension load on the anchor bolt group...
  3. mikek396

    Beam Stiffeners

    I have a job where a piece of rotating equipment is sitting on top of steel beams. Rotation is in plane with the length of the beam, so theoretically there is no (or very little) lateral force on the top flange. The beams were supposed to be set such that the slab was poured flush with the top...
  4. mikek396

    Repeat Designs

    How do you guys adjust your pricing for designs that will be used multiple times? For example: I have been asked by a machine shop to provide SWL ratings for aluminum beams they sell to contractors for rigging equipment (~5000 lbs max load). I have been doing rigging plans and choosing beam...
  5. mikek396

    Aluminum Rigging Beams

    First project I'm taking on myself and totally having imposter syndrome. Project is to provide load ratings for some aluminum (6061-T6) beams that will span between A-frame legs to be used for rigging. Beam sizes S6x5.1, S8x8.81, S10x12.1, lengths in 8'-15'. I have a previous engineer's...
  6. mikek396

    Insurance

    Does anyone use biBERK for professional liability and/or general liability insurance? I'm getting insurance quotes from a few different providers, and biBERK seems to be significantly cheaper, especially for the GL. I asked the agent why that would be and the reply I received was that they tend...
  7. mikek396

    Factoring Elevator Loads

    When elevator contractors provide machine room loads to the structural engineer, these loads have been calculated by doubling the live loads (car, counterweight, etc) to account for impact. Should I be further factoring these loads or is this overly conservative? One engineer I spoke with...
  8. mikek396

    Employed by a large contractor with different LLCs in every state

    I am a PE employed by a large specialty contractor (non-design firm) based in NY. The company has different LLCs in each state, so I am technically not employed by Contractor Florida LLC or Contractor Texas LLC, etc... Since the contractor is not licensed to provide professional services, I...
  9. mikek396

    Elevator Machine Reaction Forces

    Here is a typical block up elevator machine arrangement with car and counterweight. The car is supported by cables that run over the driving machine sheave, onto a deflector sheave (frictionless) and then down to the counterweight. I am trying to find the most accurate way to analyze the...
  10. mikek396

    Elevator Machine Reaction Force

    Here is a typical block up elevator machine arrangement with car and counterweight. The car is supported by cables that run over the driving machine sheave, onto a deflector sheave (frictionless) and then down to the counterweight. I am trying to find the most accurate way to analyze the...

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