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  1. CANPRO

    Maximum Bolt Spacing

    Hi dik, there is no maximum bolt spacing in S16. Just minimum spacing and min/max edge distance. See section 22.3. If you're looking for a Canadian reference that does specify a maximum bolt spacing, take a look at S6-19 10.18.4.5 through 10.18.4.7. This covers maximum bolt spacing to prevent...
  2. CANPRO

    Bolts and T-Stubs and Prying, Oh My!

    I'm a semi-regular user of IDEA Statica. I don't think this would be overly difficult to model. I don't think an FEA model would tell you anything you don't already know about this connection. This connection detail sucks. Pure speculation here, but it seems to me this is a "pre-designed"...
  3. CANPRO

    Bolts and T-Stubs and Prying, Oh My!

    Potential design issues aside, were the bolts properly pre-tensioned as they should be for this type of joint? It doesn't look like they were. I can see a gap between the plates at the bolt line. For that gap to develop at a pre-tensioned bolt there should have to be severe strain on the bolt...
  4. CANPRO

    Haunch Capacity

    Can you put the column on the ledge and infill below with some concrete? Easy formwork and not a lot of concrete; size the dowels to get the 3.8k back into the wall. You get easy column install, EOR gets nice continuous load path. Everyone is happy.
  5. CANPRO

    Can you flip an aluminum beam?

    good info and discussion by jjl317 and others. I wouldn't flip the beam. There is a nailing strip on the top of these beams for fastening down the plywood. If you flip the beam you won't have anything to secure the plywood to.
  6. CANPRO

    steel bridge truss top chord compression

    that is a pony truss (might go by other names in other places). The top chord is braced laterally by the web members. It requires a stiff connection between the web and bottom chord/floor beam. The effectiveness of the bracing is impacted by the stiffness of the webs, floor beams, and the...
  7. CANPRO

    Splice Connection

    One instance I can think of is for seismic bracing per the requirements of CSA S16-19 clause 27.1.6. Haven't read that in depth in a while, and reading it again now the requirements aren't completely clear. Pre-tensioned high strength bolts are required, but the connection doesn't have to be...
  8. CANPRO

    Splice Connection

    The difference is in the surface prep. You can have fully tensioned bolts and still not have a true slip critical connection if you don't have proper surface finish. For bridge construction (in my area anyway) we'd use a class B primer, but if for a building, a beam as described by OP would only...
  9. CANPRO

    Contractor will not provide rebar shop drawings?

    Another contractor perspective (steel fabricator): The quality of design drawings are declining in my area, leaving many areas of uncertainty. Schedules are getting more compressed, leaving less time for RFI's. We often rely on shop drawing review to clarify design questions that weren't...
  10. CANPRO

    Design Feedback Requested - Moment Post Base

    XR250, some possible issues I see: getting the post in the sleeve is a pain. the inside dims on an HSS never work out nicely for sleeving. You have a slight gap with your 8x8 (assuming 7.25" square) on the inside clearance, except at the corners where the timber fouls the steel. You'll need to...
  11. CANPRO

    Let's Talk Fatigue in Steel Members (with pictures)

    this is great for some light reading on a Friday night: https://www.aisc.org/globalassets/nsba/technical-documents/a-fatigure-primer-for-structural-engineers.pdf
  12. CANPRO

    Missing anchor rods in new Ottawa bridge?

    looks like elocone nuts: https://www.canam.com/en/product/elocone-nuts/ They aren't cheap, but a great solution for short projection on anchor rods.
  13. CANPRO

    Weld Penetration

    looks like poor planning and poor execution to me. Looks how far off the beams web stiffeners are from the column flanges. Something was either measured wrong, fabricated wrong, or erected incorrectly. If understand correctly, I like JedClampett's idea of adding new web material. Jed, is this...
  14. CANPRO

    Adding Steel Beam Below Exist. Conc. Beam

    Once the beams start to deflect together they will share the load in proportion to their bending stiffness. You need to have a reasonable estimate on the bending stiffness of the existing beam to do this properly. Might be further complicated by the fact that the steel beam is simply supported...
  15. CANPRO

    Welded Transfer Steel Truss Splices

    Thoughts/questions from the perspective of a fabricator: As noted above, 65' isn't that long. If breaking it into two pieces still isn't sufficiently short then surely there are more delivery problems with this project. Is this a length issue or a weight issue? Must be a weight issue. How heavy...
  16. CANPRO

    Load Calclulations - Units

    kilogram x feet is going to keep me awake tonight. Thanks, human909.
  17. CANPRO

    Continuous span beam with spring support reactions

    The stiffness of the beam is another consideration. The support reactions will depend on both the spring stiffness and the bending stiffness of the beam. As the beam gets stiffer, the spring stiffness would need to increase to remain as effective.
  18. CANPRO

    Load Calclulations - Units

    I knew the kgf force comment was coming. That is reserved for the truly insane. But even then at least the two units aren't easily mistaken for each other.
  19. CANPRO

    Load Calclulations - Units

    lbf and lbm? I'm standing on my metric pedestal right now and casting judgement.
  20. CANPRO

    Idea Statica Connection Design Review

    I'm a semi-regular user of Idea Statica. My first suggestion is to review some of their verification documentation. They have a lot of worked examples comparing their results to traditional hand calcs. Major thing to look for is how they have defined the eccentricities of the various members...

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