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adjoining house by at least 4 inches of brickwork, in which case they may bear upon the wall for two-thirds of its thickness. The ends of all timbers bearing upon a party wall 9 inches thick must not project through the wall, but must have 4 inches of brickwork at the ends of same, and all the timbers must be separated from those of the adjoining house by at least 4 inches of brickwork

Chimneys.

8. Every chimney and chimney-stack must be built wholly of brick or stone, with mortar or cement, and every such chimney and chimney-stack must be built from the foundation (and from the floors if corbelled out according to Section 18 of these Regulations) to the top thereof without any corbelling over whereby any upper part of the brickwork of such chimney or chimney-stack shall overhang any lower part of the brickwork on the front thereof.

Angle Chimneys.

17. The breast of any angle chimney built in the internal angle of any building above the ceiling of any lower storey shall not exceed 8 feet in width, and the jambs, breast, and flue must be properly supported on iron girders with brick arches, or on strong stone landings at least 4 inches thick and tailed at least 9 inches into each of the two walls forming such angle.

Chimney Jambs on Corbels.

18. The jambs, breast, and flue of any single or double chimney may be built upon stone or iron corbels above the ceiling of any lower storey, but the projection both of such jambs and breast must not in any case exceed 14 inches before the face of the wall or stack to which the same shall join, and the brickwork must be arched or corbelled over the whole width of the chimney opening up to the line of the face of the jambs, in order to provide a solid bed for the back hearth.

Chimneys.

19. The jambs of every chimney must not be less than 8½ inches wide on each side of such opening. The breast of every chimney and the front back, width or partition, of every flue must be at the least 4 inches in thickness of bricks, and the joints of the work must be filled in with mortar or cement, and all the inside thereof must be rendered or pargetted. And no flue may be used for a smoke flue which is of less internal diameter in any section than 8½ inches.

20. And as to the back of every single chimney opening in any building every such back must be at the least 8½ inches thick. If two chimneys be built back to back, then the thickness between the same must be at the least the thickness described for the back of a single chimney opening.

21. The backs of all chimneys in party walls, whether built singly or back to back, must be constructed of firebricks for the whole thickness of the back, from the surface of the hearth to the height of 12 inches above the underside of the mantelpiece, and unless register grates are fixed in the chimney openings.

22. No timber must be placed over any opening for supporting the breast of any chimney, but there must be an arch of brick or stone over the opening of every chimney to support the breast thereof, and unless the arch be semicircular, an iron bar or bars must be built into the jambs at the least 9 inches on each side to tie in the abutments. And no timber or woodwork must be placed or laid under any chimney opening or in any wall under any chimney opening within 18 inches at the least of the surface of the hearth to the fireplace of such chimney opening and no chimney or timber which must be nearer than one inch to the opening of any chimney, and no timber must be placed nearer than 18 inches to the front face of any chimney; neither shall it be lawful to build in, or insert the ends of any joists, rafters, beams, or other timber whatever in any part of any chimney or flue.

Hearths.

23. Front hearths composed of a slab or slabs, brick, tile, slates, stone, marble or other proper and sufficient substance, at the least 9 inches longer than the opening of every chimney when finished, and at the least 15 inches in the front of the arch over the same must be laid before the opening of every chimney, and in every floor,

except the lowest floor, such slab or slabs must be laid upon brick trimmer arches, or upon a solid bed of cement concrete laid uniform in thickness and without a joint, to form a bed for the hearth and front hearth or hobs, provided nevertheless that the boarding under the front hearth to carry the concrete bed be not nearer to the finished surface of the hearth than 6 inches at the least. Should the joists be not deep enough to allow of such depth of 6 inches being obtained, a brick trimmer arch must in all cases be used. In the lowest floor the slab or slabs may be laid on a brick stone floor, or bedded on the solid ground.

24. The back hearth of every chimney must be laid and bedded wholly on brick or stone, or other incombustible materials, which must be solid for a depth of 9 inches at the least below the surface of the hearth.

Ovens, Furnaces, &c.

25. Every oven, furnace, close fire, or forge must be 6 inches at the least distant from any party wall, and must not be upon or within a distance of 18 inches of any timber or woodwork, measured from the outside of the brickwork; and the floor on or above which such oven, furnace, or close fire, or forge shall be built or fixed must be formed and paved under same, and for a distance of 2 feet all round same, with stone, brick, tile, or slate, at the least 2 inches thick, or with other proper incombustible non-conducting materials. No oven, close fire, furnace, or forge shall be erected in the open air, nor within a distance of 6 inches adjoining any building constructed of brick or stone, nor within a distance of 18 inches of any internal or external wall constructed of wood or iron, nor within a distance of 18 inches of any adjoining building constructed of wood or iron.

Chimney Shafts.

26. Every chimney shaft, or flue hereafter built, raised, or repaired, must be carried up in brick or stone-work all round, at least 4 inches thick to a height of not less than 36 inches above the highest part of such portion of the roof, the flat, or gutter, adjoining thereto, measured at the point of junction; and as to any chimney shaft (except that of a steam engine, brewery, distillery, or manufactory), the brick or stonework of such shaft or flue must not be built higher than 8 feet above the slope, flat, or gutter of the roof which it adjoins, measured from the highest point of junction; unless such chimney shall be built of increased thickness, or be built with, or bonded to another chimney shaft, or be otherwise rendered secure. And as to the chimney shaft for the boiler furnace of any steam engine, or for any brewery, distillery, or manufactory, it may be erected of any height so that it is built in such manner and of such strength and dimensions as shall be satisfactory to the building Surveyor upon special application in each case or, in case of appeal, to the City Council.

Stoves.

27. Every detached stove set or fixed in any building shall be fixed subject to the requirements for furnaces, &c., contained in Section 25 of these Regulations, with the stove pipe leading into a brick or stone flue.

Alterations in flues.

28. No chimney shaft, jamb, breast, or flue, already built or hereafter to be built, shall be cut into for any purpose whatever without the consent of the Building Surveyor having been first obtained to the proposed alterations.

Roof Coverings.

29. The external parts of any roof, flat, or gutter, of any building hereafter to be built, and the external parts of every turret, dormer, lantern-light, or other erection on the roof or flat of such building, must be covered with slates, tiles, or metal, glass, artificial stone, or cement, except the door frames and doors, window-frames, and sashes of such turrets, dormers, lantern lights, or other erections, which may be made of such wood as shall be necessary.

30. If the external parts of any roof, flat or gutter of any building already built, or the external parts of any turret dormer, lantern light, or other erection on the roof or flat of such building be rebuilt, stripped, riped, or uncovered, then every such part (except the door-frames and doors, window-frames and sashes, of such turrets, dormers, lantern lights, or other erections) must