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

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SUMMARY

The discussion centers on the design and functionality of a 12mm steel spreader plate beneath a steel I-beam intended to span a 4-meter opening in a brick wall. The spreader plate's role is to distribute the load from the I-beam to the underlying masonry, preventing excessive compressive forces. Concerns were raised regarding the lack of bolting or welding between the plate and the beam, which may affect load distribution and potentially lead to shear cracking in the masonry. Calculations using beam design software, Eurobeam, indicated that a larger plate would be necessary to adequately distribute the load without exceeding the masonry's allowable compressive strength.

PREREQUISITES
  • Understanding of structural engineering principles, particularly load distribution.
  • Familiarity with beam design software, specifically Eurobeam.
  • Knowledge of masonry compressive strength and building codes.
  • Basic physics and mechanics related to load-bearing structures.
NEXT STEPS
  • Research the implications of unconnected spreader plates in load distribution.
  • Learn about masonry compressive strength standards and building regulations.
  • Explore advanced beam design techniques using Eurobeam or similar software.
  • Investigate alternative designs for bearing plates that ensure uniform load distribution.
USEFUL FOR

Structural engineers, builders, and anyone involved in residential construction or renovation projects requiring load-bearing calculations and compliance with building codes.

  • #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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