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  1. #1
    Join Date
    Jul 2011
    Posts
    5

    Default Help with Lap joint on 1/2" plate

    Let me start by saying I don't know what is best when doing stick welding since I don't do a lot of it so please be kind. I am about to weld some W8x24 beams to 8"x8" anchor plates with a lap joint and going to use a gas powered SMAW machine. What type and size rod would be best for this application and would multi passes be required or is there a rod that is large enough that a single pass would do.

    Thanks in advance for your help.





    The only person that can be considered ignorant is the one that knows that they don't know and doesn't ask some one who does.

  2. #2
    Join Date
    Dec 2007
    Location
    alabama
    Posts
    749

    Default

    An answer would depend on your machine current output and welding position.
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  3. #3
    Join Date
    Oct 2005
    Location
    North Central Indiana
    Posts
    782

    Default

    I would run 5/32 6010 first pass around the beams 1/4" web and 3/8 flanges and use either 1/8 or 5/32 7018 to complete the fillet welds.

    I don't understand where lap joints are going?

    I'm thinking the 1/2" anchor plates will be welded to the end of the W8X24 beams and be bolted to a floor or another beam.

  4. #4
    Join Date
    Apr 2009
    Location
    Upstate SC
    Posts
    141

    Default

    I don't understand where lap joints are going?

    I'm thinking the 1/2" anchor plates will be welded to the end of the W8X24 beams and be bolted to a floor or another beam.[/QUOTE]



    I'm thinking they will be lap joints because he said these are to be beams, not columns.
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  5. #5
    Join Date
    Oct 2005
    Location
    North Central Indiana
    Posts
    782

    Default

    Thanks chewinggum for trying to straighten me out but I still don't get it. South Carolina people are the best, never ran across one that wasn't polite and helpful.

    Do you have a home made BBQ? I wish I could come down and eat some South Carolina BBQ with ya, tackit

  6. #6
    Join Date
    Jul 2011
    Posts
    5

    Default More Explaination

    There will be W8x24 beams spanning 20' and resting on 1'x1' columns.
    under the beams will be anchor plates 8"x8"x1/2" that the beams will sit on
    and need to be weldedDetail.jpg

    I hope this is more clear.

  7. #7
    Join Date
    Nov 2008
    Location
    Troy, OH near Dayton
    Posts
    43

    Default

    The weld you show in your drawing could be made with 5/32 E7018 electrodes. Your drawings should specify how large the fillet/lap weld bead should be. They should also tell you the extent of welding, 100%, or some kind of intermittent stitch weld. If the drawings do not specify the size of the weld needed, then the best guess would be to make them the same size as the thickness of the plate, or 1/2". You could do this with 2 or better 3 passes.

    This weld could be made with E7024 and/or a larger diameter electrode if you need to work faster and if the welding machine will supply enough current for larger electrodes. Check your electrode supplier's website for recommended amperage settings.

    My recommendations assume the beams and plates are typical structural steel, and not a higher strength material. If they are something unusual, then you will need to ask what strength/type filler metal to use.

    Quote Originally Posted by rpberchtold View Post
    There will be W8x24 beams spanning 20' and resting on 1'x1' columns.
    under the beams will be anchor plates 8"x8"x1/2" that the beams will sit on
    and need to be weldedDetail.jpg

    I hope this is more clear.
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    Serving the Dayton, Cincinnati, and Columbus, OH metropolitan areas

  8. #8
    Join Date
    Jul 2011
    Posts
    5

    Default Help with lap joint on 1/2" plate.

    Quote Originally Posted by A_DAB_will_do View Post
    The weld you show in your drawing could be made with 5/32 E7018 electrodes. Your drawings should specify how large the fillet/lap weld bead should be. They should also tell you the extent of welding, 100%, or some kind of intermittent stitch weld. If the drawings do not specify the size of the weld needed, then the best guess would be to make them the same size as the thickness of the plate, or 1/2". You could do this with 2 or better 3 passes.

    This weld could be made with E7024 and/or a larger diameter electrode if you need to work faster and if the welding machine will supply enough current for larger electrodes. Check your electrode supplier's website for recommended amperage settings.

    My recommendations assume the beams and plates are typical structural steel, and not a higher strength material. If they are something unusual, then you will need to ask what strength/type filler metal to use.
    Thanks for your help, as far as I know there is no special material to worry about, (But I well check to be sure) and the drawings have no specs on the thickness of the weld and therefore it makes since to match the weld metal.
    So I will proceed with what makes since
    and to satisfy my need for over kill do a complete multi pass fillet the length of the weld.

    Thanks Again for your reply.

    It is nice to have a community of pros who are willing to help when you face something new. God Speed/

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