What's this steel bearing plate going to do under this steel I beam?

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The discussion centers on the design of a steel bearing plate under a steel I-beam intended to support a new opening in a brick wall. Concerns are raised about the effectiveness of the 12mm spreader plate in distributing the load over the masonry, particularly since it is not welded or bolted to the beam. Participants debate whether the plate's purpose is to distribute load or to prevent tension in the underlying brickwork, with some suggesting that the current design may lead to concentrated stress at the masonry's edge, risking shear failure. Calculations indicate that the proposed design may not meet building codes for bearing capacity, especially given the condition of the existing brickwork. Overall, there is skepticism about whether the spreader plate will function as intended in load distribution.
  • #31
See note 11

http://www.lbhf.gov.uk/Directory/En...ions/19870_Structural_Alteration_Guidance.asp

There are two routes to satisfying the building regs.

The deemed to satisfy route as above where the code provides a figure that should be safe in all cases because of generous margins of safety.

The full calculations route where more accurate calculations or even tests are performed to achieve a more economical solution by reducing the margins of safety to known but acceptable limits.
 
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  • #32
https://dl.dropbox.com/u/1040535/Beam%20Bearing%20Plate%20McCormac-AISC.pdf

Text is from McCormac's Structural Steel Design, 4th ed. The example is from AISC Design Examples v 14.0. It is specific to the US, so it may or may not be useful...
 

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