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  1. peal724

    Post-tensioned design: perimeter beams in a 2-way slab

    General info: 2-way post-tensioned flat plate using banded-distributed tendon layout, banded in North-South, distributed in East-West, unbonded tendon design Perimeter beams are being used to support a masonry veneer façade and also as part of a moment frame for wind/seismic loads Using Adapt...
  2. peal724

    Foundations up North: A Survey

    Frost depth is around 24" where I am in the Southeast. At exterior footings, I do top of footing at 24" below FFE, which puts bottom of ftg around 36" below FFE but allows for some step down and sloping exterior grade. For Florida projects, I do top of footing at 16" below FFE, unless I need...
  3. peal724

    Design of Bell & Shaft Drilled Pier Foundation for Pre-Engineered METAL BUILDING

    1. yes, it is very typical for PEMB columns to have large horizontal reactions 2. 3000 psf is very low for end bearing on a drilled shaft. Are you sure that's correct.
  4. peal724

    Large point load slab-on-grade

    I have run into the same thing. I had a project where the suggested was made (by GC) to support bldg columns on the slab-on-grade and not have individual footings. Columns supported 3 floors plus roof. Trying to not be close-minded, I entertained the idea and looked into it. I was given a...
  5. peal724

    TJI joists

    I've used Forte by Weyerhaoaususuer, and the one provided by RedBuilt, but I find that BCCalc provided by Boise Cascade to be the best. I like the way you can organize the project and it's interface seems better to me.
  6. peal724

    Pre-Fabricated Wood Roof Truss Long Span

    over 60' requires special inspection on the temporary bracing per IBC
  7. peal724

    firewall seismic R value

    Using the IBC as the design code, the language for structural stability states ".....for the duration of time required by the required fire-resistant rating." If it's a 3-hour fire wall then why am I designing it for 500 year occurrence seismic forces?
  8. peal724

    firewall seismic R value

    I've designed cantilevered CMU firewalls before, but it's always been where the seismic wasn't that bad. Got one now in a pretty bad seismic area and I'd like to stop and examine my methods to make sure the way I've always done it is still correct. What R value do you others use for seismic...
  9. peal724

    Hypothetical question

    FYIhttp://files.engineering.com/getfile.aspx?folder=7ae26414-8066-4d06-b001-198e5aaf6d88&file=2012-08_SEAOC_Solar_PV_wind_document_Final.pdf
  10. peal724

    Deep Column Weak Axis Buckling

    I agree with you about the scale and proportion. Consider this, instead of weak axis being centered how about two lines of bracing alligned with flanges.
  11. peal724

    Pile Cap Reinforcing

    i've designed several pile caps for tower cranes and the overturning moment always put tension into the piles. i can't imagine that size base working as just a mat (spread) footing. also, i've always put the pile cap reinf in an orthagonal pattern with additional bars at the pedastals. The...
  12. peal724

    Effective Seismic Weight?

    tell your co-worker "close but no cigar". the language is there that supports his argument, but it's not the right argument. that example is for computing the diaphragm force of an individual level, not the seismic base shear of the entire building.
  13. peal724

    Snow load on cable trays

    I've never heard of cable trays being exterior.
  14. peal724

    Privacy Fence Importance Factor

    privacy fences blow over at about 50 mph. you can design it all you want but it all comes down to quality of workmanship. they dig the hole, cut open and pour in the dry sack mix, pour in some water, and mix the concrete with the fence post, then stake it off to set.
  15. peal724

    Timber Exposed to the Weather - type of treatment?

    call AWPA
  16. peal724

    Wind on Shoring/Bracing for tiltwall panels during construction

    72 mph is the tilt-up industry standard wind load for temporary bracing.
  17. peal724

    Type 2 (Wind Only) Moment Frame

    Remember, the structure will behave as you have designed it. Designing structures is you shaping how it will act, not you being subjected to it's actions.
  18. peal724

    Type 2 (Wind Only) Moment Frame

    Lion, you quoted the 14th Edition with this "As an alternative, flexible moment connections (FMC) may be used as a simplified approach to PR moment connection design, particularly for preliminary design." My 13th Edition says the exact same thing except it does not contain the last four...
  19. peal724

    Plate Girder Design with AISC 13th Edition

    great reference AISC Engineering Journal First Quarter 2009 Volume 46, No.1 "Design Aids for Built-Up I-Shaped Beams with Slender Webs" by Paul P. Nasados, Jr.
  20. peal724

    Lateral Load from Snow Drifted at a parapet

    the drift triangle is a simplied shape for ease of calculation. the actual shape, that I've observed, did increase as it approached the wall but there was a small space between the drift and the wall possibly caused by melting due to the heat of the structure.

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