Is the lap length of vertical rebar in columns effected by the strength of the concrete? For example if I have 9ksi concrete for levels 10-20 and 8ksi concrete for levels 20-30, would I need a longer rebar lap length for columns in levels 21-30 than in levels 10-20? I am working reviewing rebar in a column shop drawing. Attached are the concrete notes and the lap chart that has been used in every column no matter what the concrete strength is.
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