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  • Users: akastud
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  1. akastud

    Live Load Determination

    All, I serve on an ASTM committee and have been tasked with rewriting the loads and strength portion of our particular standard. Historically our standard has used Factors of Safety for determination of acceptance criteria (essentially borrowed from another standard). These FOS do not...
  2. akastud

    FEM vs Empirical PTI Methods

    All, First time facing this issue. Usually FEM analysis yeilds a thinner slab in practice for us so this issue hasn't arisen. We recently designed a PT SOG uniform thickness slab for a large apartment complex (6-8 units per building). The soils have large edgelift conditions andcomplex...
  3. akastud

    Wood Dowel Bending Strength/Grade

    Does anyone know where to find design values for a 1 1/8" dia. hardwood dowel that you might find at a home depot? I am designing some ladder rungs and need some design values. akastud
  4. akastud

    Railroad loads

    All, I have a client who wants to build a cantilevered retaining wall that is outside the zone of influence for railroad cars. I understand that I will have no lateral pressure from the weight of the rail cars, but I am 15' away and I am curious if the vibratory loads should be of concern. I...
  5. akastud

    Glass Block Masonry Lateral Support

    2006 IBC section 2110.4.3, requires lateral support of 200 PLF. How do you interpret that, does my support have to be able to resist 200 PLF along the 4 sides of the panel? Or is it 200 plf times the horizontal direction of the block applied as a point load into the jamb or possibly as 200 plf...
  6. akastud

    Cantilever Column R Determination

    I would like to determine the R value for a steel cantilever column that supports wood beams and framing. ASCE 7-05 references special, intermediate and ordinary moment frame systems under the cantilever column section in table 12.2-1. It referances 14.1 for detailing requirements for each...
  7. akastud

    Cad Files for Shop Drawings

    All, What policy do you have when a contractor calls and requests the cad files as a "background" for their shop drawings. We have a disclaimer letter we require to be signed, but we have heard of others charging for these files (which makes sense). akastud
  8. akastud

    Missed Special Inspection

    Hypothetical question for you here guys: Lets say an architect and contractor Value Engineer special inspections out of a project. Upon the engineer learning of this liberty, the concrete walls to be inspected are halfway complete. How do you handle this situation? akastud David S. Merrell...
  9. akastud

    Frost Depth for Static Fire Line

    Dear all, forgive me for being ignorant in this community, but I am a Structural Engineer and I am in the process of building a building for my buisness. The contractor has found an extremely large vault in the path of my Fire Sprinler Supply that the city does not show in any as builts. The...
  10. akastud

    Base Plate Analysis

    I am currently studying to take the Struct 1 and Struct 2 exams. I bought a practice exam for each from the NCEES and on the struct 2 exam there is a question that leads to designing a baseplate and the anchor bolts for a vertical load and an applied moment. From a couple of different books I...
  11. akastud

    Cold Joints in Concrete Wall

    This may be a stupid question, but I can't seem to find information anywhere on the subject. Is it acceptable to have a horizontal control joint in a concrete wall? If so is there a preffered location for the joint? It seems to me like it is OK as you analyze the reinforcing steel in tension...
  12. akastud

    Prism Testing

    Hey all, I am in a small town that tends to be backwords at times, and most of the structural engineering has been done by civils who have tried hard, but sometimes don't understand the building code as well as they should to practice structural engineering, but that is a different subject for...
  13. akastud

    Masonry Bearing Stress

    Does anyone know where I can find The Allowable Bearing Stress for masonry in the IBC? I cannot find the old 0.26 f'm / 0.38 f'm from the UBC in the new IBC codes. Am I missing something? akastud
  14. akastud

    Stage Lighting

    What kind of Live Loads do you typically use for the roof framing above a stage for lighting and sound equipment. The occupants will not be suspending sets or anything from the roof, just lighting and speakers. akastud
  15. akastud

    IBC Shear Adjustment

    Hi all, The municipalities in our area are just starting to adopt the International codes, and as I am working on one project, I see something that baffles me. I was hoping one of you could help me understand. In table 2305.3.7.2 of the 2000 IBC there are adjustment factors for "shear walls...
  16. akastud

    Slab Buckling

    I have a question for everyone. I use enercalc for several of my calculations, and when I do a retaining wall, one of the options is "Slab present to resist all sliding forces". I am doing a basement wall where there is about 3000 plf of compression being resisted by the slab...
  17. akastud

    Truss Bracing

    I am in the middle of designing exposed Glulam trusses. These trusses are parallel chord flat trusses about 7'-6" in depth, and are top chord bearing. The bottom chord is entirely in tension, and I am trying to determine if and how to brace the bottom chord. The trusses will span 66' and...
  18. akastud

    Odd shaped footings

    Does anyone know of any programs that will give the soil pressures of a footing that is any shape other than rectangular. Specifically I am trying to calculate the maximum soil pressure on a triangular footing where the eccentricity is 'outside the kern'. The resultant soil pressure shape is...

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