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  1. Struct123ure

    Wood Columns Acting as "Diagonal Bracing"

    Which of you guys stamped these columns as diagonal bracing for this house? :LOL:
  2. Struct123ure

    Crazy cantilevered steel deck

    The weight of the L178x102x9.5 (SW=0.198kN/m) spaced at 610mm is 0.65kPa alone, add to it the weight of wood deck, and railing system distributed over the whole deck(just to simplify) you'll get significantly more then DL=0.5kPa and I am pretty sure balconies are LL=4.8kPa So no, it doesn't...
  3. Struct123ure

    Roof top Solar Panels

    I've run the calculations with Canadian code and for tilted solar panels your wind uplift will be hefty. The blast system ended up being large which adds a tons(literally) on the roof. 0.9DL+1.4W Then 1.25DL+1.5SN really messed up the roof. So careful...
  4. Struct123ure

    ASD (SLS) to LRFD (ULS) Bearing Capacity

    I am located in Canada and abide by OBC additionally follow the Canadian-Foundation-Engineering-Manual if that matters. I want to know what the "right" approach is to converting ASD bearing capacity to LRFD so that I can put it on a report/drawings. Approach 1: and commonly used from my...
  5. Struct123ure

    Rotational Stiffness of a Joint How to Check

    Thank you human909 I think that's what I was missing. The joint classification stiffness shouldn't change and I guess it doesn't no matter how long the beam is, but based on the length the AISC classification would change.
  6. Struct123ure

    Rotational Stiffness of a Joint How to Check

    It makes me feel a bit better that this is indeed more complicated then I initially assumed. My situation is it’s steel columns with a concrete beam between. This means all the rigid connections doesn’t apply or isn’t as simple as a fillet weld. The steel “column” is a W460x144 (W18x97) pile...
  7. Struct123ure

    Rotational Stiffness of a Joint How to Check

    How to calculate the Rotational Stiffness of a Joint? Background: I have gotten myself very confused as I try to do what seemed pretty simple. I have a model consisting of 2 cantilevers fix connected and a pin-pin beam between them. The structure was failing lateral drift so I introduced a...
  8. Struct123ure

    Bolt Thread

    This is one of those situations, where you pull up a reliable reference (usually a textbook) and start to read form the beginning of the chapter. It will take you a while, it will be tedious, you will need to do this both at work and outside of work (depends on when you need to respond by) and...
  9. Struct123ure

    Breakout Failure When New Concrete Cast Against Existing Parallel to the Edge

    Great, I like that eveyone is on the same page :). Breakout needs to be checked so it shall be (y) Yes loads a huge, one anchor isn't going to do it. I am designing a Shear Lug, but it has the same checks as single anchor so that's why the snippet applys.
  10. Struct123ure

    Breakout Failure When New Concrete Cast Against Existing Parallel to the Edge

    I've had this question for a while does breakout failure exist when you have a cold joint between 2 different concrete pours? In my case there is a column getting placed close to the edge of the raft slab with some serious force. I wondering about both Perpendicular and Parallel breakout but I...
  11. Struct123ure

    NBCC 2015 Seismic Requirements - Mixing design procedures?

    I would say obviously yes. Take a step back from the code and just look at it from a public point of view. You are EOR and the loads that the building takes need to be taken into the ground, for that to happen it need to go through your foundation design. From a business point of view, if this...
  12. Struct123ure

    Arch Beam Roark's Formulas for Stress and Strain

    I see, I didn't notice the rotation. It makes sense now, would have been helpful to include a couple extra steps, but here they are for anyone else wondering in the future.
  13. Struct123ure

    Arch Beam Roark's Formulas for Stress and Strain

    I have a arch steel beam very similar to the example attached from page 292 of 7th ed Textbook by Roark's ... The example says "To obtain the rotation of the arch at the point of attachment of the bar, we first calculate the loads on the portion to the right of the loading and then establish an...
  14. Struct123ure

    Suspension Bridge Design Examples

    Thank you for your suggestions! I spent some time reviewing the new material. I couldn't find the books on Google or Amazon though: - Bridge Engineering by David F. Merritt - Design of Cable-Stayed Bridges by J. A. H. van der Meer
  15. Struct123ure

    Suspension Bridge Design Examples

    Looking to expand my knowledge, I have never designed bridges and am looking to learn. I am interested in the design and sizing of the cables that support the bridge. Does anyone have textbooks, manuals, or resources with design examples for suspension bridges? I have looked at the following...
  16. Struct123ure

    Curved Beam Roark's Formulas for Stress and Strain

    Thank you, it all clicked once I read chapter 8. I was stuck for multiple days with this. I would appreciate your work, but I'll post my file instead for anyone wondering in the future. And also post the snippet from the textbook chapter 8 explaining. I put a simply "=if(" function at the...
  17. Struct123ure

    Curved Beam Roark's Formulas for Stress and Strain

    I have a curved steel beam very similar to the example attached from page 300 of 7th ed Textbook by Roark's ... My question is that the solution values don't make sense. 1. If you plug x=37.59 and x=130.9 into the Tx formula you don't get 13,100 in-lb & 8790in-lb respectively. (I get from...
  18. Struct123ure

    Websites or tools for querying building loads

    Can you elaborate on your question?
  19. Struct123ure

    Fall Peotection

    1. 5000lb is the unfactored load. 2. That is in any direction in a 360 sphere, use engineering judgement to figure out the critical direction Shear, Bending, Axial Tension. 3. Eccentricity is whatever the height or length of the anchor. Where does the person attach to?
  20. Struct123ure

    Egress stairs in seismic regions. ASCE Wants to have their cake and eat it too.

    I have a follow up question: Do precast mid landings and (in some cases) precast floor landings need to be rigidly connected to the core wall or placed to allow sliding deflection? I agree if the stairs are rigidly attached to the landings and the landings are rigidly attached to the core walls...

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