hw9 sol - CE 167: Engineering Economy Assignment 9 Solution...

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CE 167: Engineering Economy Assignment 9 Solution Set Spring 2008 1-a Excavate site, install full formwork and then backfill
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CE 167: Spring 2008 Assignment 9 Solution Set Page 2 of 5 Dimension of sloped formwork of beam/girder Formwork area/ Concrete volume Location of formwork Subcategory No. of sheets Dimensions (per sheet) SFCA* Concrete Volume Columns (front & back) 4 3’ x 8’ 96 2(24) = 48 ft 3 (sides) 4 8’ x 1’ 32 - Beam/Girder (front & back) 2 (24’ x 3’) – (4’ x 1’) 136 68 ft 3 (vertical ends) 2 2’ x 1’ 4 - (sloped underside) 2 4.123’ x 1’ 8.246 - (Underside) 1 10’ x 1’ 10 - *SFCA = Square Foot Contact Area Quantity of steel: (2.2% of volume contained by formwork) Rebars in Columns: volume = 0.022(48 ft 3 ) Weight= (1.056 ft 3 )(490 lb/ft 3 )(1ton/2,000lbs)=0.25872 tons Rebars in Beam: volume=0.022(68 ft 3 ) Weight= (1.496 ft 3 )(490 lb/ft 3 )(1ton/2,000lbs)=0.36652 tons Total quantity of steel: 0.62524 tons Quantity of concrete: (May subtract steel which displaces concrete volume; however, estimating concrete is
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hw9 sol - CE 167: Engineering Economy Assignment 9 Solution...

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