Ii according to supporting conditions simply

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i) According to shape: Rectangular, T, L, Circular etc. ii) According to supporting conditions: Simply supported, fixed, continuous and cantilever beams iii) According to reinforcement: Singly reinforced and doubly reinforced Depth of the beam is determined based on flexural strength and to satisfy the deflection criteria. Generally the ratio of span to depth ratio is kept as 10 to 15 and the depth to width ratio of rectangular be is taken in the range of 1.5 to 2. Minimum cover in beams must be 25 mm or shall not be less than the larger diameter of bar for all steel reinforcement including links. Nominal cover specified in Table 16 and 16A of IS456-2000 should be used to satisfy the durability criteria. Generally a beam consists of following steel reinforcements: i) Longitudinal reinforcement at tension and compression face (Min of two 12 mm diameter bar is required to be provided in tension) in single or multiple rows are provided. ii) Shear reinforcements in the form of vertical stirrups and or bent up longitudinal bars are provided. ( The bar bent round the tensile reinforcement and taken into the compression zone of an RCC beams are called stirrups)
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