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Unformatted text preview: f cu = 30 N/mm 2 , f y = 460 N/mm 2 , f yv = 250 N/mm 2 . Fig. 5.2 5.3 A cantilever beam is shown in Fig. 5.3. The 25 mm diameter deformed steel reinforcing bars are used as the main bars in the beam. The characteristic material strengths are f cu = 30 N/mm 2 and f y = 460 N/mm 2 . (a) Determine the length of tension anchorage required if straight bars are used. (b) Determine the development length needed if 180° hooks are used. (c) Determine the development length needed if 90° bends are used. length anchorage half effective depth = l Fig. 5.3 5.4 In the column shown in Fig. 5.4, the starter bars from the pad footing are T25 and upper ones in the column are T20, given that f cu = 35 N/mm 2 . What is the minimum lap length needed? Fig. 5.4...
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 Spring '06
 JSKUANG

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