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Recent content by Craig_H

  1. Craig_H

    2x4 Floor Truss

    I had a supplier propose this once. Their explanation was that their tooling couldn't accommodate lumber on its edge on their press table. I'll admit I didn't quite understand why that would be the case, but just went with another supplier who could fabricate the trusses as-normal.
  2. Craig_H

    Engineering Design 'Stack'

    Keep in mind that I am a small one-person shop and keep my software lean as a result: Frame Analysis & FEM SAFI GSE. I sometimes feel like I am the only one using this, but it works well for me. Building Climatic Loads Jabacus. Buddy started charging and he should considering how quickly...
  3. Craig_H

    Seismic Design of Mid-Rise Buildings with Heavy Rigid Floors and Light-Frame Walls

    A little over a year ago, I came across a 4-storey residential building composed of concrete hollow-core plank on light wood framed walls. Many things about the building struck me as odd. It is a combination of materials that I feel is fundamentally flawed. In my case, the building had...
  4. Craig_H

    Gable Frame w/o vertical

    Can you hang the ridge onto the wall-truss using a hanger? Perhaps a simlar to a Simpson CBH or the euro originals that it is a copy of? Regarding the frame and its connections, mortise & tenon connections can often work well. Below example was buried in the wall and is therefore PSL. I was...
  5. Craig_H

    Log cabin Roof Framing

    Wow. I can't say that I've ever engaged in the engineering discipline of "remove it, observe deflection, then add a support based upon that". I'm genuinely curious, how do you plan to size the new support columns without knowing the magnitude of load applied to them?
  6. Craig_H

    Log cabin Roof Framing

    I see a half-lap joint in the ridge beam directly above one of the 8x8s you plan on removing. I wouldn't be taking it out. Having designed these types of fire places, there are definitely cheaper ways to laterally brace the wood stud framing than by adding 8x8 columns. Your justification for...
  7. Craig_H

    LEDGERS ON ICF WALLS

    How much concrete is above your ledger? In the past, I've had the contractor cut out the foam at the interval of the ledger anchors, and form the face with plywood. Plywood can easily be made from scraps and screwed to the plastic webs in the ICF blocks. This left exposed concrete with...
  8. Craig_H

    Information for Wood Log Beams and Trusses

    Definitely a niche and very complicated. I've had the privilege of designing a few log buildings. General tips: [ol 1] I collaborated with the log craftsman. It's truly a craft and the craftsperson's style is likely to drive the truss form. I'm in Canada and my wood code (CSA O86) has...
  9. Craig_H

    Attic Truss - Floor Sheathing Flat Diaphragm

    I seem to remember asking the same question a while back. Recommended solution was to sheath the vertical webs and provide blocking at the web-to-top-chord joint. See this: https://www.eng-tips.com/viewthread.cfm?qid=475689, and KootK's excellent diagram copied below for convenience:
  10. Craig_H

    New Brunswick Structural Engineer Trouble

    I think that it's relatively safe to guess that this transfer slab is loaded to a UC of more than 1.04 (or whatever number you want to argue the semantics of). The regulator is using "serious deficiencies" in its statements, and I doubt that term is being swung around carelessly. Service level...
  11. Craig_H

    Lag Screw Withdrawal from Top of LVL

    If this is a multi-ply LVL that you are fastening to, could you not have a knife plate between the plies with dowels through the LVL? Knife gets stabbed into the column above. Not much fabrication apart from cutting a plate and drilling a few holes. That's about as concealed as you can get...
  12. Craig_H

    National Building Code of Canada - Noncombustible Construction vs Insulated Metal Panels

    Interesting find with the Kingspan K-roc. As it's filled with mineral wool, I'd be confident saying that's non-combustible. While it may be possible to argue that an insulated metal panel (with flammable foam inside) is non-combustible because of the steel wrap, I don't see it as following the...
  13. Craig_H

    Can you thermal isolate a concrete podium?

    We generally look at R-value per inch of wall thickness. In this case, I would imagine that one can consider the walls to also insulate in the vertical direction. Perhaps insulating the walls for the bottom portion would provide enough insulative value of the total assembly that your framing...
  14. Craig_H

    Residential Wood Frame Construction Partition Load

    That's my own calculation of a relatively small room size (walls 10' apart), intended to be slightly conservative so as to produce a floor pressure that I am confident won't be exceeded.

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