Nội dung text DAY 58 (SPECIAL CLASS) NOTES.pdf
LECTURE OUTLINE • One Way Slab Add strength where it matters—knowledge and willpower. DAY 58: REINFORCED CONCRETE DESIGN
One Way Slab Thickness 407.3.1.1. For solid non-prestressed slabs not supporting or attached to partitions or other partitions likely to be damaged by large deflections, overall slab thickness h shall not be less than the limits in Table 407.3.1.1., unless the calculated deflection limits of Section 407.3.2. are satisfied. Table 407.3.1.1. Minimum Thickness of Solid Non-prestressed One-way Slabs [1] Expression applicable for normal weight concrete and fy = 420 MPa. For other cases, h shall be modified in accordance with Sections 407.3.1.1.1. through 407.3.1.1.3., as appropriate. Support Condition Minimum h 1 Simply Supported l/20 One End Continuous l/24 Both End Continuous l/28 Cantilever l/10 Add strength where it matters—knowledge and willpower. DAY 58: REINFORCED CONCRETE DESIGN
One Way Slab Thickness 407.3.1.1.1. For fy other than 420 MPa, the expressions in the Table 407.3.1.1. shall be multiplied by 0.4 + fy 700 407.3.1.1.2. For non-prestressed slabs made of lightweight concrete having wc in the range of 1440 to 1840 kg/m3 , the expressions in Table 407.3.1.1. shall be multiplied by the greater of (a) and (b): a. 1.65 − 0.0003wc b. 1.09 Add strength where it matters—knowledge and willpower. DAY 58: REINFORCED CONCRETE DESIGN