This section is from the book "Modern Buildings, Their Planning, Construction And Equipment Vol1", by G. A. T. Middleton. Also available from Amazon: Modern Buildings.
Remove the surface earth to an average depth of 6 in. over the whole site; wheel and deposit where directed or cart away.
Lay dry brick rubbish over the site between walls; level up and well ram to within 6 in. of finished surface to receive concrete.
Put concrete composed of six parts of hard clean material (flints, broken brick, or as otherwise approved), one part sand and one part of best blue lias lime, under walls, of the widths and depths shown.
Lay concrete 6 in. thick, composed of one of Portland cement to six of gravel or broken brick, under all floors; those of the scullery, coal place, larder, and w.c. to be floated with i in. of Portland cement and sand of the proportion of 1 to 3 trowelled to a smooth surface, and all others to be roughly levelled.
Lay drains where shown on plans with 4-in. glazed stoneware socketed pipes, thoroughly burnt and free from all defects, jointed in cement and laid, with a fall of 1 in 40 ft., on and surrounded in 6-in. concrete composed of one part of Portland cement to six of gravel or broken bricks.
Provide all necessary bends, junctions, etc., and connect to sewer in road in accordance with local regulations.
All drains to be tested with water to the architect's satisfaction before the concrete is filled in.
Provide fresh air inlets of approved maker, fixed where shown on plan, and connected with 4-in. stoneware pipes jointed in cement to disconnecting' chamber.
Provide gullies where shown to take discharges from sink wastes with galvanised grid with one 4-in. intake each for rain-water drains, and form coping in cement and sand in proportion of 1 to 3.
Form cement concrete bed 6 in. deep below invert of channel pipes to disconnecting chamber, lay one course of bricks along each edge of main channel, and bench up with cement concrete so as to fall to top of this course of brick or to branch channels.
The bottom and sides of chamber are to be rendered in cement and sand in proportion of 1 to 3.
Provide and fix approved 4-in. brown intercepting sewer trap at outlet from chamber, the main half pipe through chamber to be 4 in. diameter 3 ft. long, and the branches to be 4 in. laid to cascade into main channel, and to be three-quarter round in section, and to proper bends to discharge in direction of flow of main channel.
The walls of chamber are to be in 9-in. stock brickwork in cement mortar (1 to 1), corbelled in to take the 2 ft. 7 in. by 1 ft. 10 in. galvanised cover, and to be fixed level with surface of back garden, and are to be rendered internally in cement mortar.