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