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Stock Tile Sizes
4' × 5" × 12" (turned, 5" × 4" × 12") 4' × 12" × 12" 6' × 12" × 12" (sometimes 6" × 5" × 12") 8' × 5" × 12" 8' × 12" × 12" | Fig. 59. Stock Tile Units |
When ordering the 5" × 12" tile shapes, which are laid on the side, the contractor should state that the usual allowance of 6-inch and 9-inch length cuts be included for use in piers and other narrow places, so as to reduce the cutting of tile on the job to a minimum; also, enough half and full closures should be ordered for use at window and door openings. See [Fig. 59] and Hollow Tile Problem on opposite page. When it comes to the case of the 12" × 12" tile, it is an easy matter for bricklayers to split off one or more cells to get the proper shapes for closures, but the usual allowance of half-lengths should be ordered. Enough 1-inch tile slabs should be included for use in leveling up the wall for joist bearings.
Tile is calculated in terms of pieces, and to arrive at the number required, use the same square feet dimensions you would for common brick backing and multiply by the proper one of the following coefficients:
Coefficients for Tile Quantities
| Dimensions of Tile Face | Coefficient |
| 4" × 12' | 2.6 |
| 5" × 12' | 2.15 |
| 12" × 12" | 0.94 |
As the face brick is bonded to the tile backing by a double header bonding course, as shown on [page 25], the amount of tile will have to be reduced accordingly. For instance, if 12" × 12" tile are used, the bonding course occurs every sixth course and one-sixth of the tile should be deducted, but at the same time, there must be added brick-size hollow tile at the rate of 12 to every 20 square feet of wall surface for use behind the stretchers in the bonding courses.
Or, if 5" × 12" tile are used, the bonding course occurs every fifth course and one-fifth of the tile should be deducted, and brick-size hollow tile at the rate of 12 to every 16 square feet of wall surface should be added for use behind the stretchers in the bonding courses. When the backing is 8 inches thick, an additional course of brick-size tile should be calculated behind every bonding course. If the brick-size tile cannot be obtained in the local market, an equal number of common brick will answer the purpose just as well. Two to three per cent should be added to all tile quantities calculated, to provide for waste.
In giving the following examples of estimating quantities it is not meant to indicate that each wall of the house is necessarily to be estimated by itself, but simply to show the way of estimating any extent of wall. Except in very elaborate and diverse elevations, the best way is to figure on the total surface of the four sides in one operation. This is the more easily done as, generally speaking, opposite sides of the house are of like area.