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Recent content by SWitmer

  1. SWitmer

    Drilled Pier - Minimum Comp Strength in ACI 318-19

    ACI 318-19 expanded table 19.2.1.1 (minimum f'c for various concrete applications) from the version of the table found in ACI 318-14 to include more applications. One new application addressed in this table is "precast-nonprestressed driven piles / drilled shafts", with a minimum value of 4,000...
  2. SWitmer

    Snow drift on lower roofs.

    For typical drifts, I agree that both types just taper to zero. The code wording that I'm questioning is talking about the special condition where the lower roof width is narrower than the calculated drift width. In my case, the 5' canopy width is narrower than the calculated leeward drift...
  3. SWitmer

    Snow drift on lower roofs.

    I agree that a narrow canopy like this one would never see a windward drift. My question is about the sentence in quotation marks regarding drifts on lower roofs tapering to zero. Does this refer to windward or leeward drifts on lower roofs?
  4. SWitmer

    Snow drift on lower roofs.

    I am trying to decipher the changes in ASCE 7-16 section 7.7.1 mentioned by DaveAtkins above as related to a canopy attached to a building. I'm designing a project with a 5' wide canopy. It has a leeward drift from the upper roof. The calculated drift height would be about 3.6'. The max...
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