Chap. X.

VALUE OF ARTIFICERS’ WORKS.

003

Above 25 centimetres scantling mostLess than 25 centimetres scantling £ most

Hours of aCarpenter.

Timber wrought all round Jor Bridges , Palisades , §*c. §*c.

Above 25 centimetres, at least -

ditto at most -

Below, 25 centimetres square, at leastditto at most

Timber rebated, &c. 8cc. above 25 centimetresditto below ditto

Timber used for machines, as cranes, pile-engines, &c. &c.

ditto, as capstans, &c.

Carpenters.30"

40

50

60

70

90

150

Hie timbers having been cut and framed, the holes for the bolts bored, the timbers arenumbered, taken to pieces, and laid aside in the yard, to be removed to their destination.

Hours of aCarpenter.

Per cube metre at least ------ 1*00 "I _

ditto at most ------ 2 00 J

Lal>our of Cutting consists of

Hours.

Four pieces of framing, mortised and tenoned at the extremities of the braces, at

3*25 hours for each -------- 13-00

8 notches for the two courses of waling pieces, 1 hour each - 8’00

1 notch for the small timbers on the piles ------ 0-50

2 end joints for the beams or sleepers at 2*50 hours each - 5-00

9 holes for bolts, 60 centimetres each, for uniting the upper timbers to the sleepers,

and for the binding pieces, making 5*40 metres, at the rate of 1 hour permetre - - - - - - - - -5 ’40

For cutting the pieces to a length, 20 ends, each having 0*09 square metres, and to-gether 1*80 square metres, at the rate of 5 hours per metre - - - 9*00

43*20 square metres of surface of face, to wrought at 1*5 hour per metre - - 64*80

Total - - - - 105*70

By dividing 105 *70 hours by 3*24 cube metres, we shall have for the labour upon eachcube metre, 32*62 hours: it will be seen that this limit is placed between 30 and 50hours, as previously given. If the timber was not wrought, the labour would only be 40*9,which divided by 3 *24 cube metres, gives for each 12*62 hours, a number placed between 10and 20, as already cited.

Baising or putting up Timbers already framed. —The expense varies according to the work:if the timbers are of small scantling, the pieces are numerous, and caution great for theremoval; carpenters are alone employed. When they are less important, machines workedby labourers are employed ; there is some difficulty in fixing a value for this kind of work.

For the raising a Cube Metre of Timber.

Hours.

When small timbers are used, and carpenters employed to raise it by hand, *]

above 25 centimetres square - - - - - - 20 l 25

below ditto - - - - - -SOj

When the timbers are of an ordinary scantling, portions being already framed, and puttogether, the labour being performed by carpenters.

Timber above 25 centimetres square - - - - " ^*1 l*»

ditto below ditto - - - - - 20 J

Hours.

For large pieces of carpentry, such as the principals used in centring, &cby machines worked by labourers - - carpenter

Above 25 centimetres square - labourer

For the striking the centres of vaults, removing temporary bridges,pieces, and placing them in boats, &c.

For each Cube metre, for a carpenter -ditto for a labourer -

. &c. raised

- 50

- 10*0taking framing to

Hours.- 20- 40

3 M 4