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  • Users: egc
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  1. egc

    Looking for #2 hot-rolled 60ksi deformed rebar

    I'm attempting to help a graduate student locate a source of the #2 hot-rolled 60ksi deformed rebar that he wishes to use for building concrete models to test. I suggested using #3 but he says their equipment won't handle models of that size. I remember there was a supplier in the 80's that had...
  2. egc

    Partially Fixed Cantilever

    I need to aproximate the deflection stiffness of an "L" shape frame (one with a vertical section supporting a shorter horizontal section - see attached *.png). The existing steel supporting the vertical member (not shown in picture) is assumed to provide complete fixity. I am going to assume...
  3. egc

    Retaining Wall with Log Loader

    I have review duties for a bio-fuel project in GA. It has a ramp for Volvo log loaders to use (4 wheels, 50k each max load). Ramp data: Walls are 14" thick and extend 4' above travel surface to contain the loader(s). Width: 35' (inside of walls) Fill Height: 10' Level Ramp Length: 35'...
  4. egc

    Combination Foundation

    We have a project where we have oversight reponsibility. The allowable contact pressure is 2000 psf. Since some of the equipment has dynamic loads (a debarker for instance), the design engineer has piling under large mat. In this case (95)-60k piling under a 32' wide a 116'6 long 2'3" thk mat...
  5. egc

    Are Structural Tees Cur from European Shapes Commonly Used

    I'm working on an overseas project where we have originally designed using AISC shapes (per specs). The client now wants us to use European shapes. What do we use for Tees? Do they cut Tees the same way AISC does (for example a WT4x9 is cut from a W8x18)? If so, what do I call a Tee cut from an...
  6. egc

    Determing Opening Wind Pressures

    Ah, another office debate! This is around determining the design wind pressures required for multi-component windows/doors. Assume you have a 25 SH unit mulled together with a half-round top unit. Two cases: 1. If the manufacturer supplies a pre-engineered combined unit with a unit rated...
  7. egc

    Determing Uplift Resistance of Interior Residential Foundations

    We have an ongoing debate around how to determine the available uplift capacity of interior residential foundations (in Florida). For example, assume you have a 6' long interior bearing wall (2x4 and well away from other foundation elements) with a combined truss uplift of 6000 lbs. Neglecting...
  8. egc

    Eccentrically Loaded Monolithic Foundations

    I am looking for information on the design of eccentrically loaded monolithic foundations (footer and slab poured at the same time). In Florida, such foundations are utilized commonly for residential as well as light commercial and pre-engineered buildings. In particular, is the "keep resultant...
  9. egc

    New ACI Residential Code

    Does anyone know when the new ACI Residential Code is going to be published and is it possible to get any information about it now? I just hang here (occasionally)
  10. egc

    Reinforcing a Field Modified Precast Lintel

    Contractor installed the garage door lintel 3" too low and now has to remove the bottom 3" of the header beam. Current header is a 32" deep x 8" wide masonry header with a ublock on top with a #5 and a 8" hollow pre-cast lintel with a #5 in the bottom. The whole thing is...
  11. egc

    Alternate Design of Slender Walls (ACI 318-02 14.8)

    If you use ACI 318-02 14.8 to design the reinforcing for a wall, do the maximum spacing restrictions sited in 14.3.5 apply? I just hang here (occasionally)
  12. egc

    Min. Steel Ratios for Concrete Walls

    Help. I am stuck away from my office (and ACI codes). What are the minimum steel ratios for concrete walls? In particular, these are 6" thick, CIP walls for residences (1 & two story). If 4 or 6 gauge mesh is used in addition to rebars, but is not developed into the foundation, can it be...
  13. egc

    Control Joints in Structural Slab on grade

    I am designing a structural slab on grade for an irregular shaped single-story (RCMU) house in Florida on a site with a clay layer. The geotechnical engineer suggested either this system or a pressure grouting approach (contractor kicked this out). The floor plan has several large projections...

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