A century ago, interior partitions were often made of common brick masonry plastered on both sides. These had excellent STC and fire resistance ratings but were labor intensive and heavy. Partition systems of hollow clay tile and hollow gypsum tile (Figure 23.39) were developed to meet these objections and continued to be used extensively until the 1950s. Both have now become obsolete in North America, replaced by plaster, gypsum board, and concrete masonry, although they are still frequently encountered in the restoration of older buildings.
Concrete masonry partitions may be plastered or faced with gypsum board but are more often left exposed, either painted or unpainted. Several types of lightweight aggregate may be used to reduce the dead weight of the partition. Decorative concrete masonry units (architectural concrete unit masonry), as described in Chapter 9, may also be used. Electrical wiring is relatively difficult to conceal in concrete block partitions; the electrician and the mason must coordinate their work closely, or the wiring must be mounted on the surface of the wall after the mason has finished.
Glazed structural clay tiles make very durable partitions, especially in areas with heavy wear, moisture problems, or strict sanitation requirements (Figure 23.40). The ceramic glazes are nonfading and virtually indestructible.
Leave a Reply