Cubic Content Of An Intertruss

Joists.

Joists : 20 on the 1st, 39 on the 2nd, 29 on the 3rd floor =

88 at 4 m.

= 352.00

388.00 m.

Purlins:

9 of 4 m.

= 36.00

Basting.

Rafters (0.40 m. from axis to axis) : 20 of 11.66 m. =

233.33 m.

Total Cubic Contents Of 13 Trusses And 12 Inter-Trusses

Joists

417.66 x 13 = 5429.66

10085.66X0.22X0.08=177.507

212.222 c.m.

388.00 x 12 = 4656.00

Basting

81.33x13 = 1057.35

3857.33 x 0.06x0.15= 34.715

233.34xI2 = 2800.00

Masonry.

2 Lateral walls 8 m. high x 48 m. long = 768 sq. m.

1168 sq. m.

2 Gable-end walls 8 m. ,, x 20 m. ,, =320 ,,

2 ,, ,, 2 m. ., x 20 m. ,, = 80 „

Less

72 windows in side-walls

104 of 2 m. x 1.75 m. =364 sq. m.

394 sq.m.

32 ,, in end-walls

4 doors 3 m. x 2.50 m.

= 30 sq. m..

There remain

774 sq. m.

The thickness of the walls being 0.22 m., the cubic contents = 774 x 0.22 = 170.720 cubic metres.

Recapitulation:

212.222 cubic metres of timber at 80 fr. per cubic metre =

16,977.76 fr.

170.720 masonry at 30 fr. ,, ,, =

5,121.60

2344 sq. metres poplar-wood planking, 0.035 m. thick at 3 fr. =

7,032.00

1120 sq. metres of tile roofing at 2 fr. 50 =

2,800.00

120 metres of gutter, including descent at 2 fr. 50 =

300.00

104 windows, including glass and paint at 50 fr. =

5,200.00

4 doors, including paint and fittings at 100 fr. =

400.00

Sundaries...

1,168.64

Total .

39,000.00 fr.

The gross amount of surface available being about 2500 metres, this comes to 15.60 francs per metre.

In the preceding estimates we have taken average French prices; it will be easy, the cubic contents being the same, to calculate prices for any other locality.

4. Estimate Of A Galleried Drying-Place

According to M. Lacroix, who is interested in this kind of installation, the cost of a drying-place sufficient for a daily production of 25,000 bricks is as follows, supposing that they remain not more than forty-eight hours (Fig. 178): -

The galleries will contain 50,000 bricks, and require 100 waggons (Fig. 185) holding 500 bricks each ; we must add 25 waggons for use outside ; hence altogether 125 waggons at 120 francs...

15,000 fr.

The tunnel, 40 metres long, costs about......

5,000

Heating apparatus and accessories.......

7,500

Rails, turn-table, etc....

2,000

Sundries....

500

Total .

30,000 fr.

Besides the cost of installation, the cost of heating must be considered; this varies from 1 to 3 francs per 1000 bricks.

To summarise and in conclusion: storeyed or galleried drying-places with special heating arrangements are necessary for factories which work during the winter. For the latter it is especially necessary that the products should be able to bear a rapid desiccation by a current of hot air, and that the conditions of manufacture allow of regular entrance and exit of the bricks. When this is so, we must calculate whether economy in labour makes up for the cost of heating. For factories which only work during the summer, choice may be made between simple "hallettes" and combined "hallettes." The cost of installation of the latter is greater, and they have less drying power, but they are more easily managed; the expense of tramways is reduced, and there is no danger of injury from the heat of the sun. In brick-making by machinery they are preferable to the simple sheds.