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Recent content by 26sig

  1. 26sig

    Live Load vs. Max. # of People

    Regarding the amount of space each person takes up, and weighs: Are there any studies that verify these numbers? I know that everyone seems to have their favorite number; are these actually based on research? -CF
  2. 26sig

    Snow Drifts on Lower Roofs (in End Zones?)

    It's my opinion that the OP should design for the full calculated snowdrift. While it's true that the wind pressure is going to be higher at the building ends, and that will have an effect on the snow, this is only during a design-level wind event. At extremely high wind speeds the snow might...
  3. 26sig

    Design of Residential Slab-on-Ground Foundation without soil report

    Without a geotechnical report, you really don't know if your assumed values really are conservative. CF
  4. 26sig

    ASCE 7-10 Wind load on external stair

    You are correct, your roof would seem to be too high to have any effect on the wind pressure for the external stair. I believe Component and Cladding is the way to go here, and I would use the same pressure as the surrounding walls, but applied normal to the underside of the stair. The idea...
  5. 26sig

    Wind loads for wall along property line

    You have to design any structure as if the other structures aren't there, for exactly the reason that you bring up. If the structures are removed, the wind pressures would increase on your structure. I believe that there's a passage in ASCE-7 that explicitly calls for this, but I don't have the...
  6. 26sig

    Dubai, Again?

    The sheer magnitude of this problem is amazing. Does the local government care about this issue? If not, can the international community apply any pressure? Dubai is marketing themselves as the City of the Future. This is decidedly backward-looking. -CF
  7. 26sig

    Oroville Dam Spillway Concrete Failure (Feather River Flooding, CA)

    It was just announced that they were planning to throttle back the flow on the main spillway today to remove debris affecting the power plant. I'm eager to see the damage to the main spillway, after all this time of near-full water release. CF
  8. 26sig

    frost depth additonal depth?

    I wouldn't use this map at all. The general concept is there (colder and deeper in the north) but the numbers are just wrong. Perhaps there's a Safety Factor missing. I work in the Ohio and Pennsylvania areas, and as a reference, southern Ohio (Cincinnati area) is about 30", and Cleveland is...
  9. 26sig

    Round Wood Pole - Combined Stress

    Can you use the guy cable locations as brace points to reduce your unbraced length?
  10. 26sig

    Development length for hooked bar in footing

    What radius is "large", rapt? 2x ACI?
  11. 26sig

    When does a masonry arch need a lintel?

    The BIA, Brick Industry Association, has a number of technical publications that are useful for brick and/or masonry. You can try looking at technical note 31 first for some basic arch information.
  12. 26sig

    Ideas for a Dissertation

    I would like to see work done on the Ground Snow Load map in ASCE 7 to reduce the Case Study regions. Some of those zones are mountainous, and some are coastal in the great lakes region but I am willing to bet that a little research could go a long way in this regard.
  13. 26sig

    Rebar splice

    For 60 ksi #7 bar it's 26.25 inches, minimum.
  14. 26sig

    Thermal Value

    I have always interpreted this table to mean, for the Ct = 1.1 entry, that there are two separate cases: 1. "Structures kept just above freezing" and 2, "Other (structures) with cold ventilated roofs....". Also, the "kept" at a certain temperature, I take to mean chilled or refrigerated to that...
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