. Canadian engineer. Urracing, plans for which were prepared by the cily l)utfailed to receive the sanction of the property ownersinterested. I rom tests on the site an allowable bearing pressureof 5,000 lbs. per square foot was decided upon and thewalls were designed to fulfil this requirement. 1 he stresses in the steel and concrete were cah liic following formula: — Neutral axis = [ v^ (rm + 2 rm) (2) Tension in steellbs. i)er sq. in. B rbd (j(3) Compression in concrete = 2B ,000 100 lbs. per sq. in. kbd {i — yi k) Where breadth of the in \e depth of the be
. Canadian engineer. Urracing, plans for which were prepared by the cily l)utfailed to receive the sanction of the property ownersinterested. I rom tests on the site an allowable bearing pressureof 5,000 lbs. per square foot was decided upon and thewalls were designed to fulfil this requirement. 1 he stresses in the steel and concrete were cah liic following formula: — Neutral axis = [ v^ (rm + 2 rm) (2) Tension in steellbs. i)er sq. in. B rbd (j(3) Compression in concrete = 2B ,000 100 lbs. per sq. in. kbd {i — yi k) Where breadth of the in \e depth of the beam in inches,distance of the neutral axis from thecompressed edge of the beam d SmrcH Map cr City er Tckvto hig. 1.—Map 01 Ciiy 01 At = hd square = area of tensilesquare reinforcement in hd _,:,vJ4„,.,r-. Fig. 2.—Detail of Reinforced Concrete Section of Wall. elastic modulus for steel in tension,elastic modulus for concrete in com-pression. m = — = 15. B = bending moment in inch-pounds. The notation being that approved by theConcrete Institute (England). A detail of the wall at its highest part isshown in Fig. 2. The longitudinal reinforcingis 4-inch square twisted bars spaced 1 ft. oin. centre to centre. The face of the wall has3-inch expanded metal @ 5 lbs. per square foot,which gives practically the same area as Y-z-inch bars would have done, and is, in thewriters opinion, a far more satisfactory dis-tribution of the steel for that part of the trunk is reinforced with i-inch squaretwisted bars at 8 ins. centre to centre, the heelhas 34-inch square twisted bars at 10 to centre, and the toe has ^-inch squaretwisted bars at 12 ins. centre to centre. Theconcrete used was a 1:2:4 mix, fairly wet,the aggregate being 34-inch limestone with aspecific gravity of
Size: 1444px × 1729px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, bookidcanadianengineer30toro
