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Recent content by exchange

  1. exchange

    Step loads of a human on a structure

    I would use 250x1.3(Impact)x1.5(unknown of the prob). Also, I suggest a welded connection to ensure no sudden movement. Tubular member sounds like the way to go.
  2. exchange

    Stair Pan Analysis

    Thanks, Am using a thicker steel plate - with underside ribs. Also found that The AISC Manual Pg. 2-145 is a great help in plate sizing. It's for simple supported plates. If anyone knows of the moment factors for plates supported on 3 and 4 sides for different length to width rations, it would...
  3. exchange

    Gas Station Canopy

    Just don't forget to account for the rainwater also. That's how the rest of them fail. Also, there is usually apretty big hole for the downspout!
  4. exchange

    Stair Pan Analysis

    I'm checking the design of a steel pan for a staircase. It consists of an 1/8" steel plate with 3" unreinforced concrete. The stringers are 4'6" apart, and the length of the landing is 6'-0" Should I consider this plate supported on 4 sides acting as a 2 way slab, or a...
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