MEN
194
MEN
Example. —How many feet superficial of glazing does awindow contain, that is 7.25 high and 3.75 wide ?
7.25
3.75
Paviors’ Work.
Pavior’s work is done by the square yard. . »
Example .—Suppose a pathway to be 45 feet 6 inches 1°and the breadth 12 feet 3 inches ; how many square y adoes it contain ?
3625
5075
2175
27.1875 feet, the answer.
Plumbers’ 'Wokk.
This is generally done by the pound, or hundredweight.
Sheet lead, used in roofing, for guttering and valleys, isin weight from 71b. to 121b. per foot; and for ridges from61b. to 81b.
The following table will show the weight of a foot,according to several thicknesses.
The thickness is set in tenths and hundredths of an inch,in the first vertical column ; and the weight opposite, in thesame horizontal line, in the second vertical column on theright hand: the integers show the number of poundsavoirdupoise, and the decimals the number of thousandthparts above the integer : so that the weight of a square footof j 1 ^, or .10 of an inch thick is 51b. and 899 thousandth-parts.
45.5 length.12.25 breadth.
2275
910
910
455
9 ) 557.375
61.930 the number of yards required.
The decimals will be reduced to feet by multiply 10 ?by 9; thus,
.930
9
the®*
8.370 feet.
It is not necessary to go any farther, as the valuenext denomination is not worth the trouble.
of * 8
Thickness.
lbs. to a sq. foot
.10
5.899
.11
6.489
1 = .11 See.
6.554
.12
7.078
* = •126
7.373
.13
7.668
.14
8.258
1 = .14 &c.
8.427
.15
8.848
.16
9.438
* = .16 &c.
9.831
.17
10.028
.18
10.618
.19
11.207
t*-
1!
to
o
11.797
.21
12.387
Example .—What is the weight of a sheet of lead, 25 feet6 inches long, and 3 feet 3 inches broad ; at 8Jlb. to thesquare foot ?
Slaters’ Work.
If the roof be equally hipped on all sides with a ^
lit
u tb e
top, and the plan of the building be rectangular, a ° u ^ilength and breadth of two adjoining sides at the eaV ® S { 0 g®'the length and breadth of two adjoining sides of the fl 8 ^ t ]}6ther; multiply the sum by the breadth of the slope, a °product will give the area of the space that is covered;
Add the number of square feet produced by rnu tl ;. e s , t0 ,the girt of the roof by the length of a slate at the ea ^ r o>the area, for the trouble of putting on the doubleslates ; also add the number of square feet produced #tiplying the length of the hips by one foot in breadth, ^ ga idtrouble of cutting the slates where they meet, toarea ; and the sum will be the whole contents, so asa compensation for the trouble and waste of materia •
Example .—Suppose a house 40 feet 6 inches in " r| .- ’je e .60 feet 3 inches in length ; the breadth of the slop® .jj 3*9 inches, the breadth of the flat 12 feet, and the l e °feet 9 inches.
3.25
25.5
1625
1625
650
Ft. In.40 660 312 031 9
82.875
8.5
144 615 9
414375
663000
4 6129690
704.4375 lbs., as required.
12 )1390
Lead-headed nails, wall-hooks, and hold-fasts, are chargedat per piece; clout-nails by the hundred : all kinds of pipesare charged at per foot run according to size of bore.Washers, plugs, valves, &c., at so much each. Joints arecharged separately.
115 10720144
2275 10 6 the area.