| 摘要 |
<p>A building block (10) for a ventilated wall includes an elongated center portion (12) flanked by a pair of substantially parallel side walls (14, 16) orientated substantially perpendicularly to the center portion (12). The center portion (12) has a first vertical wall (18) and a second sloped wall (20), the second sloped wall (20) extending between a relatively thicker bottom wall (26) of the center portion (12) and a relatively thinner top wall (28) of the center portion (12). The first wall (18) is co-planar with first edges (22, 24) of the side walls (14, 16). A stacked arrangement of such blocks, where adjacent blocks are inverted and reversed, establishes front-to-back air passages (46) that do not provide a sight line, and which prevent rain from passing through. A mold assembly (48) for manufacturing the blocks is also disclosed.</p> |
