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  1. weron4u

    Aluminum rectangular tubing

    I am trying to find Aluminum rectangular tubing that is about 4" x 2" and has a generous wall thickness. I would prefer 6061-T6, however at this point any type and temper would do. Does anyone out there have a material data sheet for someting meeting these specs. I am guessing that the...
  2. weron4u

    Aluminum Design Manual

    Does anyone have an aluminum design manual? I have an American Std. Structureal Aluminum Channel C4x2.16. I am looking for the Area, radius of gyration about weak axis, moment of inertia and possibly an allowable axial column load at 3ft of length. This information would be greatly...
  3. weron4u

    Anchor Bolt Length

    I have an application where a T-section is going to be a vertical column. I am driving two 5/8" bolts through the flange on both sides of the web directly into a vertical concrete wall as shown below. | | <---- T-section | | |________ || | || | <-----concrete foundation | |...
  4. weron4u

    allowable deflection in lifting beams

    Riggit Tony, B30.20 refers to "below the hook" lifting devices for attaching loads to a hoist. This unfortunately does not cover the hoisting beam itself. Weron4u
  5. weron4u

    allowable deflection in lifting beams

    johmue, When using CMAA #74 to calculate the concentrated stresses due to trolley wheels, do you add that stress to the stress in the tension flange, or is it treated separately? You stated above that they shoule be considered separately, but are they then combined? I don't see how the...
  6. weron4u

    bolts

    Bolts in the AISC Manual of Steel Construction show allowable tension in kips in tables 1-A and 1-B in Part 4. What is a common safety factor used for structural bolts used in lifting beams that make less than 500 lifts in their lifetime.
  7. weron4u

    allowable deflection in lifting beams

    Nick, Thank you for clarifying my misconception on grain boundary movement. However I still believe that there is some phenomenon present when it comes to large deflections. I believe that some beams can theoretically be stressed below the endurance limit and still fail due to excessive...
  8. weron4u

    allowable deflection in lifting beams

    What I am concerned about is the movement of the grain boundaries on the microscopic level. When a beam deflects past a certain point, I believe that it is no longer just stressing the beam, but that the grain boundaries are slipping and breaking as well. And if you bend past a certain point...
  9. weron4u

    allowable deflection in lifting beams

    The only problem there chicopee is that when you are designing a 20ton lifting beam, it is not feasible to assign a factor of safety of 5 so that it theoretically holds 100tons. The cost of steel would be outrageous.
  10. weron4u

    laterally bracing compression flange (short question)

    Excellent, That is exactly what I had done, my intermediate stiffener 'leaks over' the edge of the bottom flange of the W14x30 and is welded to the top of the S10. Like this, I hope it shows up the way I made it |||||||||||||||||||||||||||||| ||||\ <-- welded to top of S10
  11. weron4u

    bolting thru concrete

    bjb, Can you field weld a 3/8" plate to the flanges of the channels so as to create a boxed section around the concrete at the same locations that you would place the bolts? I'm not saying box in the entire column, but just boxing the areas for about 8" sections at each location of the would...
  12. weron4u

    laterally bracing compression flange (short question)

    JAE It sounds to me that I could possibly have the top flange of an S10x25.4 bolted to the bottom flange of two W14x30 beams, and add intermediate stiffeners to the W14x30 beams directly above the bolted connections, and have that translationally and torsionally restrain the W14x30 and the...
  13. weron4u

    laterally bracing compression flange (short question)

    Thank you all. The most common practice I see for providing lateral support during erection is using a seated connection from the end of the lateral support to the web of the beam in question, with the depth of the connection being approximately 3/4 the web depth, which would provide resistance...
  14. weron4u

    laterally bracing compression flange (short question)

    Sorry MotorCity but that made a whole lot of no sense to me. I have an S10x25.4 that spans 21.5ft and is lifting 5000lbs. It needs a lateral support at midspan to be capable of this while having a safety factor of 1.5 based off of Fb from AISC ASD. I will most likely use a double angle to...
  15. weron4u

    laterally bracing compression flange (short question)

    How far below the compression flange can a lateral support be and still be considered a laeral support. Is there a rule of thumb? weron4u
  16. weron4u

    Square steel tube columns

    If you still need this question answered, let me know what your application is and I will quickly size the beam for you. Simply give the end conditions, height of beam and load weight. If this is solely in compression, this will take 1 minute. weron4u Sheboygan WI
  17. weron4u

    I-beam charts

    AISC "Manual of Steel Construction - Allowable Stress Design - 9th Edition" This will give you the properties of every common wide flange beam, trolley beam, channel, angle iron, square tubing, round tubing, t-section etc. It will also give much more information on how to analyze loads and...
  18. weron4u

    CMAA Specification No. 74

    Does anyone have a publication from CMAA titled "Specifications for Top Running and Under Running Single Girder Electric Overhead Cranes Utilizing Under Running Trolley Hoist-No. 74?" I am looking for the section that specifies the structural design and mechanical design sections of the...
  19. weron4u

    fall arrest system anchor point

    I am leaning toward the 5000# based on ultimate strength. As long as the beam is sure to arrest the fall, I see no need to strengthen. In case of a fall, the beam will be inspected after the accident, and if there is any plastic deformation, then the beam will be replaced. If there is any...
  20. weron4u

    fall arrest system anchor point

    A fall arrest system is required to have an anchor point capable of holding 5000#. Is the anchor point required to hold this 5000# without exceeding the yield stress? I have a beam that can hold 4500# in the elastic region and about 8000# in the plastic region. Does this meet OSHA code?

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