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Beams.

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Presentation on theme: "Beams."— Presentation transcript:

1 Beams

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3 Simple beam rests on supports at both ends, with the ends to rotate and having no moment resistance.

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5 A cantilever is a projecting beam or other rigid structural member supported at only one fixed end.

6 A cantilever is a projecting beam or other rigid structural member supported at only one fixed end.

7 An overhanging beam is a simple beam extending beyond one of its supports.
Double overhang beam is a simple beam extending beyond both of its supports.

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10 Fixed end beam has both ends restrained against rotation.
Suspended-span is a simple beam supported by the overhangs of two adjoining spans with a pinned construction joints.

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12 Beams are rigid structural members designed to carry and transfer transverse loads across space to supporting elements. The concurrent pattern of forces subjects a beam to: bending and deflection which must be resisted by the internal strength of the material.

13 Deflection – is the perpendicular distance a spanning member deviates from a true course under transverse loading, increasing with load and span.

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15 Bending moment – an external moment tending the cause of a structure to rotate or bend.
Resisting moment – an internal moment equal and opposite to a bending moment, generated by a force couple to maintain equilibrium of the section to be considered.

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21 Trusses Truss is a structural frame based on the geometric rigidity of the triangle and composed of linear members subject to axial tension and compression.

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24 Parts of a Truss Top Chord Bottom Chord
are the principal members of a truss extending from end to end and connected by web members. 3. Web is the integral system of members connecting the upper and lower chords of a truss.

25 4. Panel refers to any of the spaces within the web of a truss between any two panel points on a chord and a corresponding joint or pair of joints on an opposite chord. 5. Heel is the lower, supported end of a truss.

26 6. Panel point is any of the joints between a principal web member and a chord. A truss may be loaded only on its panel points.

27 Building Construction Illustrated Francis D. K Ching


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