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A double cantilever beam 25 m long is supported 6m from the ends. Section is 300mm x 750mm. It is to be designed so that its prestress will exactly balance a total uniform load of 24 kN/m of the beam using the leacst amount of prestress. Assume centrod of the steel must have an effective concrete cover of at least 75 mm. Calculate minimum prestressing force, P. 24kN/m 13

A double cantilever beam 25 m long is supported 6m from the ends. Section is 300mm x 750mm. It is to be designed so that its prestress will exactly balance a total uniform load of 24 kN/m of the beam using the leacst amount of prestress. Assume centrod of the steel must have an effective concrete cover of at least 75 mm. Calculate minimum prestressing force, P. 24kN/m 13

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A double cantilever beam 25 m long is supported 6m from the ends. Section is 300mm x 750mm. It is to be designed so that its prestress will exactly balance a total uniform load of 24 kN/m of the beam using the leacst amount of prestress. Assume centrod of the steel must have an effective concrete cover of at least 75 mm. Calculate minimum prestressing force, P. 24kN/m 13 Select one: a. 1,440 kN b. 4,320 kN C 1,152 AN d. 5,760 kN 6.
Transcribed Image Text:A double cantilever beam 25 m long is supported 6m from the ends. Section is 300mm x 750mm. It is to be designed so that its prestress will exactly balance a total uniform load of 24 kN/m of the beam using the leacst amount of prestress. Assume centrod of the steel must have an effective concrete cover of at least 75 mm. Calculate minimum prestressing force, P. 24kN/m 13 Select one: a. 1,440 kN b. 4,320 kN C 1,152 AN d. 5,760 kN 6.
A double cantilever beam 25 m long is supported 6m from the ends. Section is 300mm x 750mm. It is to be designed so that its prestress will exactly balance a total uniform load of 24 kN/m of the beam using the leacst amount of prestress. Assume centrod of the steel must have an effective concrete cover of at least 75 mm. Using the minimum prestressing force required, determine the required eccentricity at midspan. 24KN/m 13 Solect one: a. 41.6 mmn b. 52.08 mm C. 33.33 mm d. S.89 mm
Transcribed Image Text:A double cantilever beam 25 m long is supported 6m from the ends. Section is 300mm x 750mm. It is to be designed so that its prestress will exactly balance a total uniform load of 24 kN/m of the beam using the leacst amount of prestress. Assume centrod of the steel must have an effective concrete cover of at least 75 mm. Using the minimum prestressing force required, determine the required eccentricity at midspan. 24KN/m 13 Solect one: a. 41.6 mmn b. 52.08 mm C. 33.33 mm d. S.89 mm
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