MEN

191

MEN

Ci:

Per foot superficial. Days.

ver loi

trcular work to shafts of columns, havingthe neck moulding, or part of the base,

Worked in the same stone !

Litcular or spherical work to domes or balls£ rubbed add extra . dltt °

taking up, squaring, and re-laying o ^

aR* ditto

u in courses,

. Labour on statuary or vein marble, including saw B >In g> and polishing

Llain workLircular dittoditto

"Guided ditto'teular sunk ditto‘rcular moulded ditto

On Old Work.d v ®in marble chimney re-setDitto sflnn^ ^

Ditto

Per foot superficial,dittodittodittodittodittoditto

.334

.500

.049

.042

.015

work-

Days.

.875

1.250

1.667

2.334

2.334

3.000

DittoDittoDittoDitto

ditto .125

square and re-set ditto .167

sanded, grounded, and squared ditto .209

and re-set ditto .250

cleaned and re-set ditto .250

sanded, polished, and re-set ditto .350

sawed, sanded, polished,

^red, and re-set ditto .626

X) e ~ . . Carpenters’ Work.

of —Dy carpenters’ work is meant the measuring

tet in» v? 0tl centres > groined centres, floors, partitions, cen-Jr 0 j’ ° n d-timbers, lintels, wall-plates, and roofs.

Wo RK he general customs see the article Carpenters’

0fi LEii X.—7b meas ure the centering of a cylindrical

, Ii,nt E lu , . vault -

c ' r cumf' "lultiply the length of the vault in feet, by the^duct 61 )? nCe t * le ar °b> f° r the breadth; and divide the

^ill gj v y ^0, if greater than the same, and the quotient® nu mber of squares and feet.

\ v ault J —Dow many squares of centering are there in“1 feet g ^® n gth is 18 feet 6 inches, and circumference

^7 duodecimals.

feet In.

By vulgar fractions.

31*

181

9 or 5 squares, 82 feet, 9 inches.By decimals.

31.5

18.5

tt 5,82.75— u.— To

measure naked floors , whether for

die 1-15 1,._r.. mate rials, or workmanship.

8 there be any number of pieces of timber ofbtlings and length, find the solidity of one of ]

them ; and that solidity multiplied by the number of pieceswill give the solidity of the whole.

Rule 2—If the pieces be of the same scantling, but ofdifferent lengths, add all the different lengths together,multiply the sum by the area of the end of one of the pieces,and the product will give the solidity of the whple.

Rule 3.—If the pieces be of different scantlings, but ofthe same length, find the areas of the ends of all the pieces,and the sum of these areas being multiplied by the commonlength, will give the solidity of the whole number.

Rule 4.—If some of the pieces be of one scantling, equalamong themselves, and others of the pieces of another scant-ling, equal among themselves, but all of the same length ;multiply the area of the ends of each, by the number of suchas are of the same scantling, add the products together, andtheir sum, multiplied by the common length, will give thesolidity.

Rule 5.—If the lengths vary, as well as the scantlings,find the solidity of each piece separately, and the sum willgive the solidity of the whole.

Note. —Wherever a tenon is made, the length of the piecemust be taken from the ends of the tenons, and not from theshoulders.

If the floors be fixed in the building, the distance thetimber goes into the wall, which is about one-third ofthe thickness of the wall, must be added to the length of therespective pieces that are clear of the walls.

The best method of finding the solidity of a joist, wherethe length is given in feet, inches, &c., and the dimension ofthe section in inches, is to multiply the inches together, andthrow the twelves out of the product; also throw thetwelves out of the length, and multiply these together.

Example. —Suppose a joist 15 feet long, 3 inches by 9 ;the product is 27, which divided by 12 gives 2 feet 3 inches ;also 15 divided by 12 gives 1 foot 3 inches ; then

1 3

2 3

2 6

3 9

2 9 9

Suppose the girder, to be 1 foot broad, 1 foot 2 inchesdeep, and 20 feet long ; there are eight bridging-joists,whose scantlings are 3 inches by 6£ inches, and 20 feetlong ; that is, of the same length with the girder ; there arealso eight binding-joists, whose lengths are 9 feet, and theirscantlings 8£ inches by 4 inches j the ceiling-joists are 24in number, each 6 feet long, 4 inches by 2£ inches ;required the solidity of the whole, either for materials orworkmanship.

1 2

1

1 2 area of the end of the girder.

6 6

3

17 6 area of the end of a bridging-joist.

8 number of bridging-joists.

110 0

add 1 2 the area of the end of the girder.

- [bridging-joists.

2 3 sum of the areas of the ends of the girder and

20 common length.

45 feet, the solidity of the girder and bridging-joists.