A truss of straw contains 36 lb, of old hay 56 lb, of new hay 60 lb.
The singular Colossus bridge, built in 1812 over the Schuylkill, a kind of flat arched truss, had a span of 340 ft.
In the form of boxes with top and bottom plates, side plates, and angles with proper stiffening bars on the side plates, or " I's," or lattice, or other forms of truss work.
The Howe truss of 1830 and the Pratt truss of 1844 are examples.
In the Pratt truss the struts were vertical and the ties inclined.
20 shows a Fink truss, a characteristic early American type, with cast iron compression and wrought iron tension members.
- It is convenient to consider beam girder or truss bridges, and it is the stresses in the main girders which primarily require to be determined.
65 shows a common form of bridge truss known as a Warren girder, with lines indicating external forces applied to the joints; FIG.
When caught by a gust of c, c, Thin bands of iron with truss planks a, a, and wind, actually lifted the d, d, Vertical rods.
Truss rods, portals, or lattice or plate girders constitute the more definite types of wind-bracing ordinarily employed; the bracing must reach to some solid connexion at the ground.
As railway loads increased and greater spans were demanded, the Howe truss was stiffened by timber arches on each side of each girder.
The Howe truss had timber chords and a lattice of timber struts, with vertical iron ties.
On twice the vertical projection of one truss, no train being supposed to be on the bridge.
A multiple truss consists of a number of simple trusses, e.g.
A frame used to support a weight is often called a truss; the stresses on the various members of a truss can be computed for any given load with greater accuracy than the intensity of stress on the various parts of a continuous structure such as a tubular girder, or the rib of an arch.
TRUSS (from O.