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  • Users: hardyworld
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  1. hardyworld

    Retaining Wall Lateral Load from Soils

    I have limited experience/knowledge with geotechnical engineering, but here is a problem that I do not know how to approach to find the answer. I hope your collective wisdom can help: I have a 10'-0" deep retaining wall designed in a natural clay soil with a K0=1. To reduce lateral loads...
  2. hardyworld

    Shear Wall Connection to the Roof Diaphragm

    Looking for confirmation: I'm working with an architect on the design of a CMU masonry wall building with a curved steel roof deck and steel joists. The architect intends to have the steel joists bear on their bottom chord so that he can have clerestory windows along the whole length of the...
  3. hardyworld

    Point Loads applied to steel roof diaphragm

    I am retrofitting an old structure for a new purpose. Part of the proposed changes would replace an existing non-load-bearing masonry wall with a metal panel wall. This would induce loads too high on the existing columns for axial-bending interaction. Therefore, I proposed that additional...
  4. hardyworld

    Moment/Shear/Deflection/Rotation Diagrams

    Greetings: I am trying to put together a program that will work in many many instances. I've worked it out so that for a given "element" (a given section of a continuous beam) I know the Moment, Shear, deflection, and rotation of both end points AND all loads applied onto the element. How do...
  5. hardyworld

    Dampening Structural Vibrations--Good Books?

    Problem: New equipment was recently added to a production plant. This causes noticeable (but not structurally worrisome) vibration in the concrete floor. This issue is that the basement is used for offices, and the noise from the vibrating concrete floor/columns (caused by the equipment) is...
  6. hardyworld

    Fcr for flexural-torsional buckling

    I am checking th capacity of an existing compression member. The example in my LRFD 1st Edition Manual of Steel Construction shows that: Fcr = Fy * e^(-.419*lam^2) when: lam <= 1.5 In my case, lam >1.5 What is the Equation for Fcr in this case? I'm am used to using Fcr = Fy * Q *...
  7. hardyworld

    Mat Foundation

    Greetings! I am new to the website and also relatively new to Engineering (I've worked as an EIT for 4 months now). I am working on a project where I have to analyze the suggested Mat Foundation to be placed under a building addition. Our company only has 2 S.E. and they are out this week on...

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