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  1. Jdub Engineer

    Rethinking How to Specify Lumber on Construction Plans

    I agree and disagree about the rub. some lumber yards are more sophisticated, and they can/will figure out how to substitute lumber correctly and save the customer money by doing that. The less sophisticated lumberyards will have to follow suit to keep up. If we do our part by providing a...
  2. Jdub Engineer

    Rethinking How to Specify Lumber on Construction Plans

    It seems like the summary of the article is to spec the Fb, Fv, Ft, Fc\\, Fcperp, E, and G of the material you're using, instead of just the species and grade so that it is easier for lumber yards to substitute stuff that is equivalent or better. Am I getting that right?
  3. Jdub Engineer

    Column bearing pad/footing separate from slab?

    With expansive soils, we usually don't set any bearing walls on the slab on grade. we isolate all the loads to a few interior steel columns that heavily load the soil. the slab is more likely to heave, because it is lightly loaded. The footing pads are much less likely to heave because of the...
  4. Jdub Engineer

    Column bearing pad/footing separate from slab?

    What you show is pretty typical. I wrap the post and base plate in Isolation Joint material so that the little infill concrete stays isolated from the column and foundation. We've got expansive soils so it's important to make sure the slab stays isolated from the column to allow the slab to...
  5. Jdub Engineer

    Dropped Gable Truss Vs Stick Framing Gables for Truss Project

    I'm in a high wind region, and often the ceiling is not strong enough to brace the gable wall. In those conditions, we balloon frame the wall from floor to bottom of lookout or bottom of roof sheathing and we design these studs to be full height (sometimes need extra studs or lvl's). When the...
  6. Jdub Engineer

    ASCE 7-22 drift guidelines are unconservative?

    YES, density goes up from 19.3 to 21. but not very minor compared to the .7 load factor. the drift width equations get more complicated, but in this example it'd be 10' wide for the ASCE 7-16 example and 6.5' wide for the ASCE 7-22 code. the width is a function of the drift height, and the...
  7. Jdub Engineer

    ASCE 7-22 drift guidelines are unconservative?

    Just realizing, that now in the ASCE 7-22 all the snow loads are scaled up significantly. We're in Colorado, most of our buildings are here. Pg = 40psf was common for ASCE 7-16 load combinations (1.0 * Snow). Now, Pg = 55psf will be common for ASCE 7-22 combinations (.7 * Snow) the higher...

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