Stirrup Spacing in Reinforced Concrete Beams: Figure 6

Jonathan Ochshorn

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stirrup spacing diagram

Figure 6. If the maximum shear force falls in Zone IV and is less than or equal to the shear force corresponding to "reduced" maximum spacing, and if the shear force corresponding to regular maximum spacing falls in Zone III, then reduced maximum spacing is needed in Zone IV, the spacing, s = 2Asfyd/Vs, is needed in Zone III up until the point where regular maximum spacing governs, with no web steel needed in Zone I.