. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. Fig. 86. § 60. Bollman Truss (fig. 86).—This truss is the result ofsuperposing seven simple frames cdnsisting of a top member,a strut, and two ties. The stresses are easily computed. Itis one form of the old false suspension bridge already alludedto (§ 34), with the difference that the top member replacesthe horizontal resistance at the points of support. Thedefect of this truss is that two ties supporting any strutexcept the central one. are of unequal length; expaiisionor extension, consequently, affec
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. Fig. 86. § 60. Bollman Truss (fig. 86).—This truss is the result ofsuperposing seven simple frames cdnsisting of a top member,a strut, and two ties. The stresses are easily computed. Itis one form of the old false suspension bridge already alludedto (§ 34), with the difference that the top member replacesthe horizontal resistance at the points of support. Thedefect of this truss is that two ties supporting any strutexcept the central one. are of unequal length; expaiisionor extension, consequently, affects these unequally. It isinferior to the Fink
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
