. The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world. 1. 8i2-foot Cantilever Brid;ie over Monongahcla River at Pittsburgli, Pa. 2. 415-foot Draw Span over Harlem River at Seventh Avenue, New York City. 3. 135-foot Through Span with solid floor, W. P. T. Ry. Co., Pittsburgh, Pa. 4. 820-foot Proposed .\rch for Henry Hudson Bridge over Harlem River, New York City. BRIDGE DESIGNS chord has largely disappeared, and either asolid ballasted floor is used, or a regular floorsystem is laid, consisting o
. The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world. 1. 8i2-foot Cantilever Brid;ie over Monongahcla River at Pittsburgli, Pa. 2. 415-foot Draw Span over Harlem River at Seventh Avenue, New York City. 3. 135-foot Through Span with solid floor, W. P. T. Ry. Co., Pittsburgh, Pa. 4. 820-foot Proposed .\rch for Henry Hudson Bridge over Harlem River, New York City. BRIDGE DESIGNS chord has largely disappeared, and either asolid ballasted floor is used, or a regular floorsystem is laid, consisting of cross floor beamsresting on the upper chords, and longitudinalstringers framed between floor beams. For through spans the ordinary practice isto use a floor system with cross floor beamsriveted in between the vertical posts and longi-tudinal stringers riveted between the floorbeams, but in many cases a solid ballasted flooris used, in which case the lower chords are re-inforced against bending by supporting themat their middle points from a sub-panel in thetruss, or by making deep lower chords capableof withstanding the bending in addition to the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1908
