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  • Users: efFeb
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  1. efFeb

    Baseplate - Pipe Shear Lug Embedment

    Good Morning, I have some very high shear forces on my baseplates and need something more than an extra embed or just the anchor rods to deal with this. I'm thinking to add pipes as a shear lug. My thought is to slot these through the baseplate, and not weld them at all to the baseplate. The...
  2. efFeb

    Hip Girder Truss Offset

    I am new to light frame wood construction and getting used to some of the typical framing. If I am specifying an offset for the hip girder truss, should this be given as a dimension from the wall below to the girder truss? Thanks in advance!
  3. efFeb

    Maximum cantilever for CLT roof

    Hi! I am designing a roof with a significant CLT cantilever on one end. The deflection equations in the code are set up for a simple span beam. Does anyone have any guidance on maximum cantilever for a CLT panel, or for an approach to calculating the cantilever deflections (id expect that shear...
  4. efFeb

    Expansion joint between new and existing building - Grade level

    Good morning, I am working on a new building that is right up against an existing building, where there are passages between the new and existing buildings. Neither the new or existing buildings has a basement, they are both founded at grade. At upper levels, I have expansion joints to separate...
  5. efFeb

    Structure Mass in Etabs

    Good Afternoon, I am working on a model and comparing my hand check of the structure mass to the value calculated by Etabs. I notice that my hand calculation of 1.0SW + 0.8SDL matches with the numbers I get from etabs if I create a load combination 1.0SW + 0.8SDL, but it does not match the...
  6. efFeb

    NBCC - Snow Drift Loading at Low Roof

    Good Morning, I am determining the snow drift load on a low roof, which is adjacent to a high roof. I know that the leeward case is covered by snow load case I for lower level roofs (4.1.6.5), and the windward case is covered by Case II. Out of interest, I wanted to see how the load would...
  7. efFeb

    Pretensioned Anchor Rods into Concrete Pier

    Good Morning, I am trying to wrap my head around pre-tensioned anchor rods; I have read a number of other threads and am still not quite there. If I have an anchor rod pretensioned to 1500kN, and this is anchored into a concrete pier, does this add a 1500kN compression force to the concrete...
  8. efFeb

    Vertical Post-Tensioning - Long delay before grouting

    Hi, I am coming onto a project with vertical post-tensioning designed as bonded post-tensioning, with grouted encasement. The tendons have been installed and stressed, but there has been a delay of several months, and the ducts have still not been grouted. They have been protected from...
  9. efFeb

    RTU screens with gap below - Height / clearance where i dont need to consider snow drift

    Hi! I am designing a roof with an RTU screen at a mechanical area. I am wondering if there is a clause in the NBCC (or ASCE) that tells me how much clearance i need between the bottom of my screen and my roof to ensure that snow drift will not occur at the screen? Is it as simple as calculating...
  10. efFeb

    Rotation at a free slab edge in csi SAFE

    Good Morning, I am doing an analysis of an existing slab, and I'm interested in finding out how much rotation I would get at a point if I create a free edge (unrestrained from rotation) Does anybody know how i can determine the slab rotation at an edge in SAFE? Thanks so much!
  11. efFeb

    NBCC - Parking Live Load as Assembly Load

    Hi, I am wondering if you are treating parking loads as assembly loads for live load reduction under NBCC? Thanks so much!
  12. efFeb

    Rectangular vs. Triangular / trapezoidal bearing for Offset Footings

    Hi! I mean this: vs. this
  13. efFeb

    Rectangular vs. Triangular / trapezoidal bearing for Offset Footings

    Good Morning, I have always used a trapezoidal / triangular soil bearing distribution when checking the maximum bearing on a gravity footing with eccentric loading. I have been told by others at my office that I can use a rectangular distribution instead, with the average bearing pressure...
  14. efFeb

    Squat Concrete Shear Walls with Openings

    Good Afternoon, I am designing several squat concrete shear walls with door / window openings. I haven't done this before and am wondering if anyone might be able to recommend any useful references or examples that they know of? Thank you so much in advance!!!
  15. efFeb

    New Opening in Existing Deep Concrete Beam / wall

    Good morning, I have received a contractor request to cut a new opening ~900mm x 900mm in an existing deep reinforced concrete beam (this is a perimeter wall and supports some vertical gravity loads, but does not retain soil. It spans between pilasters / pile caps). Based on the same ideas for...
  16. efFeb

    Hairpins in the place of beam stirrups

    Hi, A contractor has asked to replace beam stirrups at several locations with hairpins (135deg hook each end). I don't love this idea, but can't seem to find any reason to say no. I am wondering if there is any reason or code clause that would go against this change? Thanks!
  17. efFeb

    Farm Building Code - Tower Silos Vs. Storage of Grains

    Thanks very much everyone for your input!
  18. efFeb

    Post Tensioned Concrete - Requirements for PT running through core

    Good morning, I am working on a post tensioned concrete slab, and have an opening cutting off my core wall from the slab. Usually I would run tendons through the core wall, ensuring that they can exit the other side. From my understanding, this is to meet integrity reinforcing requirements...
  19. efFeb

    Farm Building Code - Tower Silos Vs. Storage of Grains

    Good Afternoon, I am working with the farm building code and am having some difficulty with how it is laid out. There is a clause (cl. 2.2.1.11) that relates to tower silos, and another (2.2.1.14) that relates to storage for dry grains. If I have a tower silo for storage of dry grains, which...
  20. efFeb

    Welded Rebar Embed Plate - Shear Checks

    Hi! I have an embed plate with an infinite wall on all sides that is taking only shear. My shear force is pretty high (this is a girder framing into the end of a wall), and so I am thinking to design an embed plate with 20M rebar welded to lap with continuous 20M bars in the wall. To check this...

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