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  1. bhiggins

    Is this structure braced?

    Thank you everybody for the input. I wanted to avoid using some small welded frames, but that might just be best option here. I was wondering if there were alternative options, but why do anything non-standard or risky here. There will be a roof deck above so it's just better to play it safe.
  2. bhiggins

    Cold Formed Steel naming

    In the past, I exclusively used SSMA nomenclature in my drawings and specifications. However, I found that a significant number of builders were unfamiliar with SSMA terminology, which often led to confusion and incorrect material orders—particularly with regard to gauge and member size. To...
  3. bhiggins

    Is this structure braced?

    Hi everyone, I'm currently working on a house with a third-story pop-up section that has an elongated oval shape. The ends of this structure will feature curved walls framed with curved plywood sheathing, which will be finished with a layer of corrugated metal cladding. I'm a bit hesitant to...
  4. bhiggins

    Increasing the deep beam capacity by adding a new concrete part on top of it.

    It may be a bit more efficient to bolt a channel to the underside or face of that opening to resist the deep beam tension loads. The bolts would need to be sized for shear flow for composite action.
  5. bhiggins

    Brick Arching Action

    I would actually consider the wall segment above as a large deep beam spanning between the opening. I would check the allowable shear and bending stresses vs those allowed for unreinforced brick masonry (these are quite low, around 30 PSI). I would of course reinforce the span with a steel...
  6. bhiggins

    Builder Ethical Woes

    Thank you all for your responses. For reference, here's the wall framing and curtain-wall in question, and pinky-sized anchor bolts. If there is any consolidation, there was rigid bridging installed so there could be some load sharing between the studs:
  7. bhiggins

    Builder Ethical Woes

    I've run into some unique ethical and professional challenges on a small tenant finish-out project, and I’d really appreciate some insight. The scope of my work involved designing a 20-foot-tall cold-formed steel and hot-rolled steel building façade to support a curtain wall system, several...
  8. bhiggins

    Retaining Wall Reinforcement

    After further consideration, I expect that fabric-wrapped backfill would be analyzed similarly to a stacked gravity retaining wall (such as a gabion wall or stacked limestone block wall), where sliding and overturning stability need to be evaluated for each individual unit. However, I'm...
  9. bhiggins

    Retaining Wall Reinforcement

    Hi everybody, I frequently get asked to evaluate older retaining walls, and I'm trying to develop some typical cost-effective reinforcement details for walls deemed inadequate. For context, I'm currently assessing a 4-foot-tall reinforced concrete cantilever retaining wall that's approximately...
  10. bhiggins

    Structural Detailing Software

    I've been using classic AutoCAD for all of my drafting and detailing over my entire career. I'm really fast and efficient doing it the old way, but I'm curious if there is a better way or newer specialized software to try out. The detailing process is super laborious and tedious so I'm looking...
  11. bhiggins

    Fastening to LVL Below the Neutral Axis

    Also it might be wise to use a larger angle, L6X4X5/16. The 6" allows for bolts to be pushed up slightly more, and I think 4" is needed for proper bearing with a 5 1/2" brick cavity.
  12. bhiggins

    Fastening to LVL Below the Neutral Axis

    I try to avoid loading wood perpendicular to grain except in instances with light loadings. However, I've done this detail frequently without any issues so far, with 2 or 3 LVL ply's. I always note for the brick lintel to have 6" of bearing on brick each end to provide some rotational support...
  13. bhiggins

    Slenderness Ratio for Architectural Structure

    Analyze the structure using direct analysis method (DAM). Apply notional loads to a the structure with reduced stiffness, perform p-delta analysis. Check lateral drift and column stability.
  14. bhiggins

    FALL ARREST LOAD (ASCE and OSHA)

    Don't skimp on fall arrest safety, just not worth it.
  15. bhiggins

    causes for cracking at embed plate

    Very poor judgement cramming so much into a concrete cantilevered "pinky". This was destined to fail, with or without rebar.
  16. bhiggins

    Moment calculation of semi-circular or triangular two-way slabs

    Here's a laborious but fairly accurate method:
  17. bhiggins

    House with Foundation Cracks

    This is a serious crack if it is propagating through deep concrete walls. The cracks are symmetric and are located at the geometric center of the foundation. The foundation may be settling parallel with the observed cracks. The soils can be heaving if you are in an area with expansive clays...
  18. bhiggins

    What could have caused the damage done to concrete columns?

    What is the distance of the bolts to edge of concrete? It's common for concrete to spall due to inadequate concrete cover between the bolts and edge of concrete. Where cyclical horizontal and vertical stresses will weaken concrete adjacent to the bolts. How old is the structure? the steel...
  19. bhiggins

    Blodgett's vs. AISC Steel Manual

    I never said ALL welders are meth addicts, only a certain percentage which is a 100% true statement. Ya'll need to hang out more with the people who build the structures, I was one of them. They are great people with their own share of problems like everyone in this world. Drug use and...
  20. bhiggins

    CAST YOUR VOTE! The Great DIY Steel Joist Detailing Competition of 2022 - Win $250 USD

    Hey everyone, sorry late for the party! Here's a cool concept I came up with today: Tested this out in RISA, 0.25 deflection for 24 ft span. Not bad,

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