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  1. #1
    Join Date
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    Default Girder/Pier bearing surface

    Looking for info./documention on the required bearing surface between a Girder and a pier.

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  2. #2

    Default Re: Girder/Pier bearing surface

    The only thing I can think of is the 3" bearing requirement onto masonry. I don't deal with CMU piers in this area, so someone else will chime in with better info. I'm sure.
    Those shims look pretty pathetic.


  3. #3
    David Valley's Avatar
    David Valley Guest

    Default Re: Girder/Pier bearing surface

    Greg,

    Those appear to be wood shims which are not allowed.

    These images may help you...

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  4. #4
    Join Date
    Mar 2008
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    Default Re: Girder/Pier bearing surface

    Quote Originally Posted by Greg Jenkins View Post
    Looking for info./documention on the required bearing surface between a Girder and a pier.
    You might want to check code requirement for solid top cap or grouting of the pier.

    Here is an excerpt from:

    NC Department of Insurance
    Office of the State Fire Marshal - Engineering Division


    The following guidelines will apply:
    1. Plates would have to meet the requirement of Section R506.2 for bearing surface as well as the requirement for treated wood in Section 323.
    2. The minimum width of a plate must be the width of the girder that is being supported.
    3. The maximum depth of a plate is restricted to 1-1/2" because of the available heights of standard masonry.
    4. The plate material must be a minimum compressive strength equal to the wood girder material.
    5. Horizontal forces are not resisted at the plate location.


    Hope this helps. Note that this is interpretation of NC codes.


    Last edited by Vern Heiler; 09-17-2010 at 05:34 AM. Reason: add solid requirement
    The beatings will continue until morale has improved. mgt.

  5. #5
    Join Date
    Feb 2008
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    Caledon, Ontario
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    Default Re: Girder/Pier bearing surface

    They look like steel plate and are not wood. Bearing should be 3.5". And the blocks are oriented wrong.


  6. #6
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    Default Re: Girder/Pier bearing surface

    Quote Originally Posted by Raymond Wand View Post
    They look like steel plate and are not wood. Bearing should be 3.5". And the blocks are oriented wrong.
    If the girder is 5" then the shims must be no less than 5".

    What's wrong with the orientation?

    The beatings will continue until morale has improved. mgt.

  7. #7
    Join Date
    Feb 2008
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    Caledon, Ontario
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    Default Re: Girder/Pier bearing surface

    Vern,

    I stand corrected about the orientation, I withdraw that comment, haven't had my second cup of coffee yet. Thanks for pointing that out.


  8. #8
    Join Date
    Mar 2008
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    Charlotte NC
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    Default Re: Girder/Pier bearing surface

    Quote Originally Posted by Raymond Wand View Post
    Vern,

    I stand corrected about the orientation, I withdraw that comment, haven't had my second cup of coffee yet. Thanks for pointing that out.
    Good morning Raymond,
    Just finished my third. Now I'm going to quiver my way to first inspection.

    The beatings will continue until morale has improved. mgt.

  9. #9
    Join Date
    Mar 2007
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    Charleston, WV
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    Default Re: Girder/Pier bearing surface

    The shims are metal and the piers are short enought that I don't believe grouting is required. I was also going with the 3 inch bearing but wasn't sure if this applied to piers or end bearing of the girder only.

    Greg Jenkins

  10. #10
    Art Dotson's Avatar
    Art Dotson Guest

    Default Re: Girder/Pier bearing surface

    I would expect a bearing point at least as square as the girder width. Assuming a 3 ply girder.....4 1/2 x 4 1/2. There is a butt joint in at least one ply....both members of that ply should be adequately supported. Shims aren't mentioned in the IRBC except in beam pockets in the foundation walls. It is assumed that the pier height will be correct.

    Art Dotson
    Construction Code Services, LLC
    permitexpeditors.com


  11. #11
    Join Date
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    Charlotte NC
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    Default Re: Girder/Pier bearing surface

    Quote Originally Posted by Greg Jenkins View Post
    The shims are metal and the piers are short enought that I don't believe grouting is required. I was also going with the 3 inch bearing but wasn't sure if this applied to piers or end bearing of the girder only.
    Greg I took this from the bulk.resorce.org site, so graciously given to us by Gunner. I took what I think is pertinent from the WV site.

    "1805.5.7 Pier and curtain wall foundations. Except in
    Seismic Design Categories D, E and F, pier and curtain wall
    foundations are permitted to be used to support light-frame
    construction not more than two stories in height, provided
    the following requirements are met:
    3. Piers shall be constructed in accordance with Chapter
    21 and the following:
    3.3. Hollow piers shall be capped with 4 inches
    (102 mm) of solid masonry or concrete or the
    cavities of the top course shall be filled with
    concrete or grout."

    The beatings will continue until morale has improved. mgt.

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