Figure 7-43.-Standard shapes of side-construction building tiles.Figure 7-44.-Standard shapes of end-construction building tiles.is laid on one of its web faces is called ancompressive strength of tile masonry of 300 lb perEND-CONSTRUCTION tile. Figures 7-43 andsquare in, based on the gross section may be7-44 show the sizes and shapes of basic side- andend-construction building units. Special shapes foruse at corners and openings, or for use as closures,are also available.Physical CharacteristicsThe compressive strength of the individual tiledepends upon the materials used and upon themethod of manufacture, in addition to thethickness of the shells and webs. A minimumexpected. The tensile strength of structural claytile masonry is small. In most cases, it is less than10 percent of the compressive strength.The abrasion resistance of clay tile dependsprimarily upon its compressive strength. Thestronger the tile, the greater its resistance to wear-ing. The abrasion resistance decreases as theamount of water absorbed increases.Structural clay facing tile has excellentresistance to weathering. Freezing and thawingaction produces almost no deterioration. Tile that7-28
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