An Elementary and Practical Treatise on Bridge Building: An Enl. and Improved Edition of the Author's Original WorkD. Van Nostrand, 1899 - 352 Seiten |
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Seite 29
... middle section , lower chord = 3w , x length ( action = h ) , gives 3h2M . 8h2 M. A remaining sections , with stress = h 2wx length ( = 4h ) , give .... V Making whole amount of action on tension material = 2v M. ( 152 + 6c ) M ...
... middle section , lower chord = 3w , x length ( action = h ) , gives 3h2M . 8h2 M. A remaining sections , with stress = h 2wx length ( = 4h ) , give .... V Making whole amount of action on tension material = 2v M. ( 152 + 6c ) M ...
Seite 45
... middle , than the end portions of the arch and chord . If the weights at b and g be removed , the pressure at each abutment is diminished by of the maximum , or , by 7w " ; and fj , sustaining only 3 " at the maximum , and having the ...
... middle , than the end portions of the arch and chord . If the weights at b and g be removed , the pressure at each abutment is diminished by of the maximum , or , by 7w " ; and fj , sustaining only 3 " at the maximum , and having the ...
Seite 62
... middle sections ; no action being imparted by diagonals at m and l . XLVIII . This uncertainty of action has no place in trusses of an even number of panels , as in such cases , no transfer of the action of weight can be supposed to ...
... middle sections ; no action being imparted by diagonals at m and l . XLVIII . This uncertainty of action has no place in trusses of an even number of panels , as in such cases , no transfer of the action of weight can be supposed to ...
Seite 68
... middle panel be slack , by inch in 15 feet of length , no decussation will take place , and the centre diagonals will be inactive , under the full load of the truss . If those members have less than that degree of slackness , they will ...
... middle panel be slack , by inch in 15 feet of length , no decussation will take place , and the centre diagonals will be inactive , under the full load of the truss . If those members have less than that degree of slackness , they will ...
Seite 71
... middle panels . Hence expression for material is 40м . The verticals obviously require tension material equal to 4м , and the aggregate for the truss , is , For Compression . Chord , For Tension . 40M Chord ,. 44M .... Obliques ...
... middle panels . Hence expression for material is 40м . The verticals obviously require tension material equal to 4м , and the aggregate for the truss , is , For Compression . Chord , For Tension . 40M Chord ,. 44M .... Obliques ...
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Häufige Begriffe und Wortgruppen
abutment act by tension acting by thrust amount of action arch truss assumed beam bearing bolts cast iron centre cloth compression connecting block construction counter braces cross-section curve deflection depth of truss diagram diameter draw bridges Electric Engineers equal feet flanges force full load gives gonals greater half Hence horizontal action horizontal reach horizontal thrust Illustrated inclination joists king braces latter length less liable lifting force lower chord maximum stress maximum weight morocco movable load multiplied negative resistance nodes number of panels oblique members panel truss pieces portion posts pressure produced Prof proportion rail road represented respectively rivets Second edition side single track rail span splice plates square inch strain strength of materials tension material thickness tical timber tion trapezoidal Truss Bridge truss Fig upper chord uprights vertical reach weight of structure weight sustained whence width wrought iron