Structural · S-R3GQ3

Shotcrete Reinforcing Bar Spacing and Clearances

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Reinforcing bar spacing and clearances are specified for single and double curtains placed in shotcrete walls. Minimum clearances are established at two and a half inches for number five bars and smaller, and six inches for number six bars and larger. Bar spacings are governed by bar diameters, with specific minimums applied to bars closest to the nozzle and bars in the curtain furthest from the nozzle. Lapped bar spacing requires a minimum of three times the bar diameter and a maximum of one-fifth of the lap length, with clearances between two and six inches.

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