D.—No. 19.

"Pour first-class, four second-class, and six third-class crossings, with two cattle-stops to each crossing, as per Drawing No. 8, shall be constructed at public and private roads AA rhere directed. They shall be carefully placed as to line and level, and finished in strict conformity Avith the drawing and the notes thereon. Each level crossing shall be metalled for a length of 66 feet on each side of the centre line, as above specified for the roads, and tile or timber box drains shall be put in the formation ditches where necessary for the drainage of the line or road. Eorty pair of malleable iron tubular or other approved gates, 12 feet wide, • hung to strong posts, and furnished with bolts and padlocks, shall be provided and hung at private crossings where directed. Cattle-stops, as shown in drawing No. 8, are to be put in where directed, not < exceeding forty in number, besides those at level crossings. MATERIALS. 11. Except where otherwise specified, all the materials used under this contract shall be of following kinds and descriptions : — All masonry, except archwork, coping, and string courses, to be of rubble laid 1 in cement-mortar. Bond-stones, tw ro feet long, to be put in every square yard of both face and back of work. All spalls are to be set in mortar, and not laid dry, and afterwards grouted. Eacework must have no stone containing less than onequarter of a cubic foot. The Avork shall be grouted every foot in height; archwork shall be of brick, set in cement-mortar; but Avhere flat-bedded stone exists approved by the Engineer, the Contractor may use it for arches, but he must in that case increase the thickness of the arches 25 per cent, beyond that shown on drawings. All wingwalls, parapets, and abutments shall be finished with a coping of brick on edge, one brick wide, set in cement. The coping is not generally shown on draAvings. The whole of the masonry is to be neatly pointed. A layer of puddle, 9 inches thick, to be put over the arches of culverts. i All timber shall be of matai or totara, or other timber specially approved; it i shall be heart-wood, except as shown on Drawing No. 12, and shall be straight and sound, free from shakes, large knots, and other imperfections. The whole of the straps and bolts shall be made of 8.8. crown iron, or other 1 iron of equal quality, of the dimensions shown, the whole to be finished and fixed in a workmanlike manner. Bolts shoAvn or specified shall have a square head, of which the thickness shall ] be equal to the diameter of the bolt, and the width twice the diameter of the bolt. They are to be tapped with a good clean thread, and shall have a nut equal in size to the head of the bolt, and shall be provided with one or more washers 3 inches diameter. BRIDGES AND TIMBER OPENINGS. 12. Bridges, as per detail draAvings, shall be erected where shown on 3 longitudinal section. All joints, shoulders, and sides of tenons and scarfs to be worked perfectly j true, and to fit accurately, and to be covered with red lead before being put together. Tenons generally to be 5 inches long, and to be draw-bored to receive trenails of hard wood made with liolloav auger or trenailing machine. All trenails to be Avell seasoned and kept dry, and to be one-sixteenth of an inch more in diameter than the hole bored for them, and to be covered Avith red lead before bein«' driven. All capsills and mudsills to be mortised on to posts or piles. All string pieces to be accurately notched down to capsills or floor beams by notching & inch from each, to be scribed and accurately fitted. Diagonal braces, where placed inside the panel, are to be notched together as described for string pieces. All piles are to be rung before driving with a 3 inch by £ inch rounds hoop. The piles are to be shod with a substantial iron shoe weighing not less than 30 lbs., securely fixed; the point of the pile to be cut true, and to be squared off at the end to 3 inches square, and to have true bearing against the shoe. No pile-driving is to be commenced at any bridge, opening, or other work without giving six days' notice previously to the Engineer in charge of the works.

Level crossings.

Gates.

Cattle-stops.

Masonry.

Puddle.

limber.

Malleable iron.

Bolts and nuts.

Bridges, &c.

foints.

Piling.

99

INVERCARGILL AND MATAURA