. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. best manufacturers. In designing the links care must betaken to provide sufficient cross section at the eye,AB+CD, fig. 36, as well as at EF. The diameterof the pin EC must be such as will allow it to resistthe shearing stress on it, and the surface of the pinand eye from B to C must be sufficient to bear thecrushing stress. Otherwise, although the pin may not beshorn it may be squeezed flat, and the head of the linkmay bulge out and be much distorted under the stress. Toobtain the necessary surface, wit
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. best manufacturers. In designing the links care must betaken to provide sufficient cross section at the eye,AB+CD, fig. 36, as well as at EF. The diameterof the pin EC must be such as will allow it to resistthe shearing stress on it, and the surface of the pinand eye from B to C must be sufficient to bear thecrushing stress. Otherwise, although the pin may not beshorn it may be squeezed flat, and the head of the linkmay bulge out and be much distorted under the stress. Toobtain the necessary surface, without unduly increasing thediameter of the pin. the link may be rolled with a head. Pig. 37. broader than the body of the link. The section at GH andIJ must also be sufficient to resist shearing. When twoor more parallel- chains are used, care must be taken thatthe rods suspending the platform bear equally on the eeveral chains. Fig. 37 shows a plan of securing of unequal dip should not be used to support onepiatform, for the strain cannot be equally divided betweenthem, inasmuch as they must deflect unequally with anypassing load, or with any increase of temperature. § 33. Merits and Defects of Suspension Bridges.—Thegreat merit of a suspension bridge is its , arisingfrom the comparatively small quantity of material requiredto carry a given passing load across a given span. Thismerit may be easily seen by considering an. elementaryexample. A man might cross a chasm of 100 feet hangingto a steel wire 0-21 inches in diameter, dipping 10 feet;the weight of the wire would be I275 lb. A wroughtiron beam of rectangular section, three times as deep
Size: 2070px × 1207px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
