MASON-WORK. To Masonry belongs all sorts of stone-work; paving and causewaying are measured by the square yard. Digging for foundations or vaults is estimated by the folid yard. Slabs, chimney-pieces, &c. by the square foot. Stones for hewn-work, marble blocks, columns, &c. by the folid foot; but marble-facings by the superficial foot, two inches being the standard thickness. Hewn-work is generally measured by the superficial foot. The dimensions are taken by a measuring-line, which is bent into all the hollows, and over the projections, in order to afcertain the extent of surface which has been shaped by the tool. Ruble-work is estimated by the rood of 36 square yards; the standard thickness is 2 feet; and walls of any other thickness must be reduced to that standard. The value of materials is charged by the solid measure, and of workmanship by the superficial measure *. Circular work, arches, &c. are estimated double measure. Deductions for all vacancies, such as doors, windows, &c. are made with regard to materials, but none with regard to workmanship. Different When the thickness is unequal in different parts, it must be reduced to the Aandard of 2 feet, by making proper allowances on such parts as are thicker or thinner than others. For example, if the gable of a house is three feet thick, find the superficies, and to this superficies add one half of the fame. Different methods are used in different places for taking the dimensions of a house; and indeed of these there is such a variety, that scarcely any general rule can be given. A measurer, therefore, before he proceeds to measure a house, ought to inform himself as to the nature of the agreement, the customs of the place with regard to the method of taking dimenfions, and of making allowances. It is, however, a pretty general custom to add one half the thickness to the height of the side walls, as an allowance for the extraordinary trouble of levelling, and a foot for every belt. This allowance is given at the stated rate. A gable-end, where there are no vents, may be considered a triangle, and measured accordingly; but when there are vents, it is a trapezoid, and ought to be computed by the rule for its proper form. Chimney stalks are measured by multiplying one-half the girt by the height. EXAMPLE. I. Required the solid content of a wall whose length is 53 feet 8 inches, its height being 12 feet, and thickness 3 feet. 1006 3 9 II 39 2)2012 6 Ans. 9 roods 11 yards 3 feet 9 inches. 3018 9 standard Ex. 2. Required the content of a wall whose length is 66 feet 9 inches, its height 10 feet 3 inches, and thickness 2 feet. Anf. 1556.718 feet. Ex. 3. In a chimney-piece, the length of each jamb is 4 feet 4 inches, breadth of both together i foot 9 inches, length of the mantle and fab each 4 feet 6 inches, breadth of both together 3 feet 2 inches—required the content. Anf. 21 feet 10 inches. BRICKLAYERS-WORK. In Scotland, brick-work is measured by the square yard-in England, by the square rod, which is 16.; long, and consequently contains 272.25 square feet; but 272 is generally se steemed sufficiently accurate. Brick-work is of standard thickness, when the wall is the length of one brick and the breadth of another, thick. Brick walls of other thickness must be reduced to that standard by the following RULE. Multiply the superficial content of the wall by the number of half bricks in the thickness; divide the product by 3, and the quotient is the content, reduced to standard thickness. EXAMPLE I. A brick wall is 36 feet 6 inches long, and 17 feet 3 inches high, and 51 bricks thick-required the content. Ex. 2. A brick wall is 841 feet long, 171 feet high, and 51 bricks thick-how many rods of brick? Anf. 19 rods 2 quarters 35 feet. Ex. 3. If each side wall of a building be 45 feet long on the outside, each end wall 15 feet broad on the inside, the height of the building 20 feet, and the gable at each end of the wall 6 feet high, the whole being two bricks thick-required the content. Anf. 12.1761. PLAISTERERS WORK. PLAisterers work is of two kinds, viz. plaistering upon walls, called rendering ; and plaistering upon laths, called ceiling. Deductions are made for doors, windows, &c. All is measured by the square yard. EXAMPLE 3 B EXAMPLE I. The length of a partition is 22 feet, and height 12,-how many yards of plaister-work are in it? Ex. 2. If a ceiling be 591 feet long, and 24. feet broadhow many yards ? Anf. 162.652 square yards. Ex. 3. How many yards, rendering and ceiling, in a room 28 feet long, 131 broad, and 8 high? Anf. 117 yards 3 feet 9 inches. CARPENTERS WORK. CARPENTERs or joiners work is that of flooring, roofing, partitioning, &c. and is either measured by the square yard, or by the square of 100 feet. Doors and window-shutters are reckoned work and halfwork. If the door be pannelled on both sides it is esteemed double work. For the architrave, gird it about the outmost part for its length ; measure over it as far as can be seen, when the door is open, for the breadth. In the measuring of roofing, for workmanship alone, sky-lights and holes for chimney-shafts are deducted; but when for workmanship and materials together, no deduction is made. |