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ARCHES Comparison of various types analysis of three
PORTALS AND RIGID FRAMES Lattice type portals
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analysis angle angle of friction applied assumed B.M. diagram base beam bearing value bending bolts bridge cable calculated cantilever cent centre chapter clay coefficients cohesion column compression concrete connexions contraflexure deflexion depth diameter displacement distributed load effect elastic equations example factor of safety fillet formula foundations friction ft.-tons girder given Hardy Cross Hence hinged horizontal in.-tons influence line joint length link polygon maximum method parabolic arch piers plane plate portal frame Pre-stressed ratio reaction locus resistance rigid frame rivets safe load sample sand shear strength shear stress shown in Fig side-sway slope Soil Mechanics span stanchion statically indeterminate steel strain energy Structural Engineer subsoil sway moments tensile stress tension thrust timber tons per sq uniform load unit load usually vertical load voussoir wall weight welds width wind pressure zero