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  • Users: HankTexas
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  1. HankTexas

    New risk category V in UFC specification

    I have used the design response spectrum in ASCE 7 for seismic analysis but I'm certainly not an expert in seismic analysis. The newest version of the UFC 3-310-04 military specification has a risk category V which states the structure must perform elastically during a seismic event. It also...
  2. HankTexas

    Load Factors

    Several years ago I did quite a bit of research for a presentation on wind loading. During that research I discovered that the probability of a 50 year storm occurring over a period of a 50 year structure lifetime was about 66%. This was considered unacceptable but it was understood that the...
  3. HankTexas

    Drilled pier uplift friction values

    Several years ago I did quite a bit of foundation design for the structures I designed but haven’t done a lot lately. I recently designed a large structure that is being erected in Australia and I was asked to review the foundation design that was done by a local company. Since there were large...
  4. HankTexas

    Typical small building foundation in Maryland

    I am a structural engineer in Texas. Normally a foundation for a small building (15' x 50') would be a monolithic slab with a thickness of 6 inches and grade beams around the perimeter that are 12" wide by 18-24" deep. I have a project in Maryland where the frost line is shown as 29". If someone...
  5. HankTexas

    Question about ASCE 7 seismic loading

    Section 12.5.3(a) states "100 percent of the forces for one direction plus 30 percent of the forces for the perpendicular direction" Does that mean take 30 percent of the forces in the perpendicular direction, add them to the forces in the first direction, then apply the results in the same same...
  6. HankTexas

    Partial penetration aluminum welds

    I’ve obviously behind the times as we have been using the 1990 version of the aluminum welding code which has details for bevels on pre-qualified partial penetration welds. When we got the 2003 version there were no details for partial penetration welds. Are there now no requirements for bevels...

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