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Recent content by cpiedra23

  1. cpiedra23

    Wind on Elevated Walkways

    sorry if this is something you've already looked at, but using ASCE 7-10 wind design chapters (Chapter 26 and so on) would provide some info. i'm not sure of any elevated structure sections, but it'd be the place to start?
  2. cpiedra23

    Max. allowable load on building rooftops

    max. allowable loads, considering gravity only, are normally split between dead (permanent) loads and live (occupancy) loads. for a roof, dead loads would be the weight of the roofing, insulation, attached ceiling, structural weight (of the deck and beams), and other loads. live loads for a roof...
  3. cpiedra23

    Soil / Earth Seismic Load on Structures on Slopes

    thanks for the input wannabeSE! i wanna be an SE too (in california) - failed last october (both portions, sadly), but will be trying again this coming october. been going through SEAOC's 5 volumes, and soon will be looking at those bridge books by connor, and ppi's six minute solutions and...
  4. cpiedra23

    Soil / Earth Seismic Load on Structures on Slopes

    @sandman21 thanks i've seen that clause... this is me being a code reader; it says the geotechnical report must have that information... but i don't see where the code says the building's LFRS must be designed for it? i know it's implied, but i swear there was another section. maybe it was in...
  5. cpiedra23

    Soil / Earth Seismic Load on Structures on Slopes

    i remember there's some code line that says something to the effect of, where structures sit on sloping grades where the grade difference between the two opposing sides is 6' or over, the structure's LFRS shall be designed for seismic forces from the soil. is this clause in the IBC somewhere...
  6. cpiedra23

    Wind Load on Trellis

    ps. i need to design the members for the C&C load. and here's the picturehttp://files.engineering.com/getfile.aspx?folder=f5707f70-0905-4c9f-8168-c61288f050ab&file=Section.jpg
  7. cpiedra23

    Wind Load on Trellis

    thread507-244903 i have a circular domed trellis (see attached picture. is a half circle (180 degrees) with radius of about 6'. the trellis is continuous in and out of the page. the cmu wall on the right in the picture is not continuous but only columns spaced every so often. the wall on the...
  8. cpiedra23

    Curved WT Beam

    thanks guys. i did contact a few and they basically said "hahahaha." cheers.
  9. cpiedra23

    Curved WT Beam

    i have an architect who would like a curved WT9x38 beam, with the flange on the outer most radius of the curve. The radius is about 5'4" and makes a half a circle. i'm worried whether this is possible with the WT beam. i see the web buckling during bending but what do i know. could make this...
  10. cpiedra23

    CMU & Concrete 'Shear Friction', Development Lengths

    the key is constructed supposedly using a shaped 2x4 centered on the wall and along its plane (in and out of the detail), with the top of the 2x4 flush with the top course of the masonry. the 'shaped' sides are beveled outwards. sorry i don't have a second to sketch but hope that helps. anyway...
  11. cpiedra23

    CMU & Concrete 'Shear Friction', Development Lengths

    the wall is indeed bearing, and this is an existing condition. 1) it is an existing condition 2) a) doesn't the shear friction of ACI 318-11, Sect. 11.6.4 address the shear dowel design? b) laterally (out of plane of the wall) i would think some consideration would be required especially with...
  12. cpiedra23

    CMU & Concrete 'Shear Friction', Development Lengths

    1) oh wow i didn't really think about that (the clamping together) - thanks for that insight. however, in my case the surfaces are smooth and nor roughened. there is a key present but my supervisor said to ignore the the key in resisting lateral movement of the wall. therefore, it'd be only the...
  13. cpiedra23

    CMU & Concrete 'Shear Friction', Development Lengths

    hey guys. please see attached detail. http://files.engineering.com/getfile.aspx?folder=66805665-7dff-4311-b64d-6f0798f8a746&file=20160503_095833.jpg i'm checking the CMU wall anchorage for out of plan loads per ASCE 7-10, Sect. 12.11.2.1 i thought i should check the hook development length...
  14. cpiedra23

    ACI 318-11, Appendix D, D.3.3.4.3, Upset Threads and Stretch Length

    I've been studying the referenced ACI code section, specifically (a)3 and a(5), and am having a hard time understanding what exactly 'stretch lengths' are, how it's detailed, the benefits of its use. Also, I can't find a clear definition/explanation of what 'upset threads' are. I've tried...
  15. cpiedra23

    Chain Link Fence with Slats - Percent Opening

    SlideRuleEra & JAE Oops -- I meant 40% open, ...which now sounds not conservative at all. Hah. Anyway, many thanks for your inputs. First Eng-tips thread, too. Will definitely post again. Cheers.
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