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  1. #11
    Join Date
    Jan 2013
    Posts
    28

    Default

    Sounds like your building a pedestian bridge,you will need an engineer and I will guess you will be surprised by all the codes and regulations required to do this right, in the eyes of the law or in our trade AKA insurance companys.but if its privite you may be able to pass under the radar if you dare ,be careful and good luck,it sounds like an interesting job.

  2. #12
    Join Date
    Jul 2009
    Location
    Australia
    Posts
    1,029

    Default

    I have designed Skywalks before using both methods.
    The I beam system gives more options and looks so much better. It does cost more but it depends how much your client is willing to spend. The live load on the walkway will be large as it is going to be installed into an office. Deflection will determine the size of the members without doubt. As the other members suggested and you have come to the opinion this is an engineer project.

    Ji
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    Grip it and Rip it

  3. #13
    Join Date
    Sep 2009
    Location
    Colorado
    Posts
    186

    Default Handrail affecting beam size?

    Quote Originally Posted by Portable Welder View Post

    However, It does not make sense that you would not have a handrail, If the hand rail is done right you could use a much smaller beam.
    I am curious about the handrail affecting the beam size. Off the top of my head, I can't think of a handrail that would have any impact on the size of the beam. Can you show me a photo of an example? I suppose if you had solid sides going from the beam to the handrail, then the handrail would contribute somewhat to affecting the size of the beam, but the solid sides would probably have a larger effect.......

    Richard
    Last edited by raferguson; 05-02-2013 at 08:55 AM. Reason: Correct spelling

  4. #14
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,794

    Default

    See previous post, bottom view where the handrail becomes a truss system to help carry the load.
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  5. #15
    Join Date
    Jul 2009
    Location
    Australia
    Posts
    1,029

    Default

    Sure you have Raferguson there are examples all round you. The best example I can explain is road bridges, to be more exact 1920 steel hot rivet bridges that look like a mechano set. The side structure is a truss to take the vertical loads and the horizontal structure carries the wind load.
    Google "Cairo Mississippi River Bridge"


    Ji
    Grip it and Rip it

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