Consider the following statements about flitched beams:
1. A flitched beam has a composite section made of two or more materials joined together
in such a manner that they behave as a unit piece and each material bends to the same
radius of curvature.
2. The total moment of resistance of a flitched beam is equal to the sum of the moments of
resistances of individual sections.
3. Flitched beams are used when a beam of one material, if used alone would require
quite a large cross- sectional area.
Of these statements
Statement 1: "Flitched beam has a composite section of two or more materials joined
together such that they behave as a unit piece and each material bends to the same radius
of curvature" Correct.
·This is the fundamental definition of a flitched (composite) beam — e.g., a timber beam
reinforced with steel plates. Since the materials are joined and act as one unit, they
undergo the same curvature (1/R) at any section, even though their individual stresses
differ (due to different E values).
Statement 2: "Total moment of resistance = sum of moments of resistance of individual
sections" Correct.
· Since both materials bend to the same radius, and each contributes its own moment of resistance based on its own E and I:
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