Bearing Plates

Posted in Building | Email This Post Email This Post |
Print Friendly

To resist a beam reaction, the minimum bearing length N in the direction of the beam span for a bearing plate is deter- mined by equations for prevention of local web yielding and web crippling. A larger N is generally desirable but is limited by the available wall thickness.

When the plate covers the full area of a concrete support, the area, in 2 (mm 2 ), required by the bearing plate is

A 1= R/0.35fc
Where
R=beam reaction, kip (kN),
f c= specified compressive strength of the concrete, ksi (MPa).

When the plate covers less than the full area of the concrete support, then, as determined by following table
Bearing Plates formula
where A2= full cross-sectional area of concrete support, in2(mm2 ).

With N established, usually rounded to full inches (millimeters), the minimum width of plate B, in (mm), may be calculated by dividing A1 by N and then rounded off to full inches (millimeters), so that BN >=A1. Actual bearing pressure fp, ksi (MPa), under the plate then is
fp=R/BN

The plate thickness usually is determined with the assumption of cantilever bending of the plate:
Bearing Plates-2
where
t=minimum plate thickness, in (mm)
k=distance, in (mm), from beam bottom to top of web fillet
Fb= allowable bending stress of plate, ksi (MPa)

More Entries :
Comments
  • T.R. Sasthakumaran June 29, 2011 at 6:22 am

    This sites is very useful in civil family

  • Post a comment

Share Information

What is Civil Engineering

Journals Books And Softwares

Branches Of Civil Engineering

Civil Engineering Jobs

Follow Us On FB

Knowledge Center

Civil Engineering Universities/Events

Gallery - Civil Engineering Pictures

Search


engineeringcivil.com awarded best online publication by CIDC 2013

Top Contributors

Yahoo Group - Civil Engineering Portal

Subscribe to EngineeringCivil.com


Powered by groups.yahoo.com

Recently Added

Civil Engineering Links

Follow Us On FB