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What spacing is required for joint reinforcement in glass block?

  1. 12 inches

  2. 16 inches

  3. 24 inches

  4. 36 inches

The correct answer is: 16 inches

The required spacing for joint reinforcement in glass block is typically 16 inches. This spacing is established to ensure adequate support and stability for the glass blocks, which can be quite heavy and are vulnerable to cracking if not properly reinforced. Joint reinforcement at this interval helps distribute loads evenly and prevents the blocks from shifting or bowing. While other spacings like 12, 24, or 36 inches might be relevant in different construction contexts or materials, they do not provide the structural integrity needed for glass block installations. This specific spacing requirement is important in maintaining the structural performance and aesthetic appearance of glass block walls, making 16 inches the appropriate choice for joint reinforcement.