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Maximum spacing of shear reinforcement for nonprestressed column is given ACI Table 10.7.6.5.2.

V_s

Maximum s, in.

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host	Confluence:2933017122
body	--uriencoded--$$ \normalsize \leq 4 \sqrt%7B f_c'%7Db_wd $$

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host	Confluence:2933017122
body	--uriencoded--$$ \normalsize [d/2 \; \; , \; \; 24]_%7Bmin%7D $$

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host	Confluence:2933017122
body	--uriencoded--$$ \normalsize > 4 \sqrt%7B f_c'%7Db_wd $$

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host	Confluence:2933017122
body	--uriencoded--$$ \normalsize [d/4 \; \; , \; \; 12]_%7Bmin%7D $$

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Columns of Earthquake Reistant Structures

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One-fourth of the minimum column dimension
For Grade 60 or S420, 6d_b of the smallest longitudinal bar
For Grade 80, 5d_b of the smallest longitudinal bar
s_o, as calculated by using ACI Eq. (18.7.5.3); (The value of s_o shall not exceed 6 in. and need not be taken less than 4 in.)

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host	Confluence:2933017122
body	--uriencoded--$$ \normalsize s_%7Bo%7D = 4 + \Big( \frac%7B14-h_x%7D%7B3%7D \Big) \; \; \; (in.) $$

According to ACI 18.7.5.5, beyond the length l_o, conditions given below should be satisfed;

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