| Question about Bridge Estimation project? Thanks?

Question about Bridge Estimation project? Thanks?

hawk31 asked:


We got this project in class, and he never said anything besides to put the final estimation in lbs and tons. Other than that I don’t have any ideas of how to do this. I was wondering if someone could give me some tips or ideas about how to do this or any other help you could supply.

You are to perform a weight estimation of the first floor entrance bridge on the Engineering Sciences Building (located on campus).

You will prepare a report with the drawings, figures, and references needed to complete a written report. The report will contain all of the assumptions that were used to arrive at the final weight estimation.

Thanks to anyone who helps. I just don’t know where to begin.

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Comments

One Response to “Question about Bridge Estimation project? Thanks?”

  1. Alan on May 27th, 2009 4:02 pm

    Field engrs in the Corps/Eng have guidelines for this. They use it to grade bridges during combat moves of armor.

    For your purposes, measure or estimate the sections of beams and slabs. If closely spaced and reinf. concrete, take the beams to be comprised of the beam proper and a portion of the slab both sides. With the span, you can estimate the section properties and go from there. Use the beam formulas for simply supported.

    Allowable stress? Compute using a range of allowable stress, because you don’t know the duty this bridge will encounter during the lifetime. An intelligent discussion surrounding this issue will gain you points.