where the stress distribution line is assumed to have a vertical inclination of 1:3 over the depth and must have a clear distance of t1/4 from any adjacent compressed area as shown in Figure 4.16a. On this basis,

and where h is less than 40 mm, a value of 40 mm must be used. (ii) For a member with a concentrated compressive force applied over its full width b and which is directly over a continuous support on the opposite face and at a hef < 2.5b

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