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Recent content by CPBe

  1. CPBe

    seismic supports straddling building expansion joint

    @TRAK.Structural - Unfortunately, there's no re-locating the duct. (Believe me, that's the first question I asked!) @HTURKAK - What/where do you mean 2 extra EJ in horizontal direction? (Flex/canvas duct in 2 additional locations?) Would specifying any in the vertical direction help? And should...
  2. CPBe

    seismic supports straddling building expansion joint

    All expansion joints are 4" Duct is supported w/strut stands & periodic seismic/wind stands comprised of anchored pipe posts & horizontal channel members. Roof finish is a PVC membrane over insulation; the plan for seismic/wind stands are (for now) to be anchored to a concrete slab on metal deck...
  3. CPBe

    seismic supports straddling building expansion joint

    Looking for some insight on how to accommodate building expansion in some seismic supports for rooftop ductwork. Building expansion in 1 direction is one thing, but I'm unsure how to handle 2 directions. See sketch below: Currently thinking some canvas duct when crossing the E-W expansion could...
  4. CPBe

    Seismic bracing for in-line components

    Looking for some input/interpretation on a somewhat vague paragraph in ASCE7 ch.13 - see excerpt below: Suspended components that are installed in-line and rigidly connected to and supported by the piping system, such as valves, strainers, traps, pumps, air separators, and tanks, are permitted...
  5. CPBe

    beam load off center

    Hey, all - still working to solve this one. Do you feel this approach would cause the same offset load issue for the lower frame?: (Trying to keep the lower/existing frame if at all possible.) As always, thank you for your input - much appreciated.
  6. CPBe

    beam load off center

    Here is the plan for the base steel (per structural): And here's a photo of the corner (w/removed steel plate): One though that was brought up was installing 2 additional W27s at each end & shifting the 2 W14s inward, similar to below: This seems costly (and I'm somewhat doubtful it would...
  7. CPBe

    beam load off center

    Update: after visiting the site the issue isn't entirely clear, but there are some more variables to consider. 1) There are springs between the unit support steel & the steel anchored to the concrete footings; springs are only about 5"wide, and the bf of the unit support steel is 10"w 2) The...
  8. CPBe

    beam load off center

    Here's a plan view (red lines indicate outline & bolt pattern of equipment): (Overall dim's are approximately 33'x21') Planning on visiting the site later today to get more info. Thank you all for your help, I really appreciate it!
  9. CPBe

    beam load off center

    KootK: Yes - equipment could be removed. SWComposites: Could you please point me in the right direction for the most straight-forward approach of sizing & spacing transverse stiffeners? (Also, would stiffeners on the left side provide much benefit in this scenario?)
  10. CPBe

    beam load off center

    Have an issue with a large piece of equipment sitting off the web of the main support beam - see sketch below: Field crew claims the web is bending inward along with the top flange, and the member isn't even fully loaded yet. What, in your opinion, would be the most economical approach to...
  11. CPBe

    Q: reinforce existing beam for new RTU?

    Maybe I'm making this more difficult than it needs to be...(?) Would reinforcing each of the joists the RTU is supported by be a more straight-forward approach?
  12. CPBe

    Q: reinforce existing beam for new RTU?

    Looking for some input on an existing roof structure. Field-gathered info indicates the existing structure was designed for a 30 psf roof load. When the added weight of a 3.1k RTU is introduced beam deflection exceeds L/240, so I'd like to reinforce per the following schematic: Trying to keep...
  13. CPBe

    reinforce existing i-beam

    Hello all, I have a somewhat unique issue that I've been tasked with and would appreciate feedback from an experienced group. There is an existing roof structure (which all preliminary calc's indicate was designed to hold roof construction, live load, & some snow) which is getting a new 2,600...
  14. CPBe

    Fasteners subject to Bending

    Guess that actually answers my last question. Thank you so much for your help! It's greatly appreciated!
  15. CPBe

    Fasteners subject to Bending

    Sorry, didn't adjust that auto-filled value - see below:
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