Florida Building Code Practice Exam

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What is the minimum clearance required between parallel reinforcement bars used in shotcrete construction when using No. 5 bars?

2-1/2 inches
3 inches
3-1/2 inches
6 bar diameters

The correct answer is: 2-1/2 inches

The minimum clearance required between parallel reinforcement bars in shotcrete construction when using No. 5 bars is 2-1/2 inches. This requirement is established to ensure proper placement and compaction of the shotcrete around the reinforcement, which is crucial for the structural integrity and performance of the construction. Adequate spacing allows for effective bonding between the concrete and the reinforcement, preventing any potential voids that could weaken the structure. This distance is specifically recommended for No. 5 bars to accommodate their diameter while still ensuring that the reinforcement is adequately encapsulated by the shotcrete.