U-7,

18

1. Bearings 3 feet apart. Dead load in centre 7 tons. Deflection after half an hour not to exceed \ inch, nor permanent set J inch. 2. Bearings 3 feet apart. Falling weight 600 lb., fall 4 feet 6 inches. Rail to bear two blows without breaking and without deflecting more than 1 inch. Fishplates. 11. The fishplates must be of 8.8. Staffordshire iron or other of equal quality to the satisfaction of the Consulting Engineer, 15 inches long, and be sawn off square at the ends : be perfectly straight and smooth on every surface, free from twist, and of uniform section throughout. 12. Four holes are to be punched in each plate, of the form and dimensions shown in the drawing, or as may be directed by the Consulting Engineer. 13. Each fishplate is to be heated and dipped into boiled linseed oil. The fishplates are to be bundled together by wire in bundles of 5 pairs each. Fishbolts, Fangbolts, and Spikes. 14. The whole of the fishbolts, fangbolts, and spikes are to be of 8.8. Staffordshire iron or other of equal quality, to the satisfaction of the Consulting Engineer, and of the forms and dimensions shown on the drawing annexed. The washers are to be Grover's patent steel spring washers, one washer to be supplied with each fishbolt. 15. Each bolt and nut after being screwed, and each spike, is to be heated and dipped into boiled linseed oil. 16. The initials "N.Z.R." are to be stamped on each bolt, nut, and spike. 17. The whole are to be packed in cases securely fastened, and labelled on the outside with the'number and description contained in each. Nuts are to be screwed on to fishbolts and fangs, and must not be sent loose. Points and Crossings. 18. The points and crossings are to be made to an angle of lin 9. They shall include all proper fittings, castings, fastenings, switch boxes, and other equipments as shown on Drawing No. 19. All wrought-iron used shall be of 8.8. Crown iron, or other approved brand of equal quality, free from all defects; and all welds shall be perfectly sound and free from burns, scale, or other defects. 20. Any steel shall be best double-shear, or equal quality, and shall show perfectly sound welds. 21. All castings shall be of the best cold-blast iron, perfectly sound, smooth, and free from all flaws and defects. 22. The ends of the frog rails, wing rails, and switches, shall be properly drilled where requisite, to take the bolts of fishplates. 23. The switch-rails are to be accurately bent and planed. The rods, bolts, keys, pins, and other malleable ironwork, are to be cleanly forged, fitted, and finished. The bolts shall be cut with a clean full thread, the nuts similarly tapped a good fit, and the cottar-bolts to have clean true slots, with cottars accurately fitted to same. All holes in rails must be drilled. 24. The slide-chairs are to be filed smooth on the surface in contact with the foot of the rails. 25. The switch-boxes shall be with turnover handles. 26. The several parts of each set are to be properly marked by letters or otherwise, and the whole sets are to be numbered consecutively. 27. The whole of the bolts and all other forgings shall be dipped hot into boiled linseed oil. The castings shall receive three coats of good anti-corrosive paint. List A. Drawing No. 1 General Plan and Longitudinal Section (16 sheets). „ „ 2 Cross Sections (13 sheets). „ ~ 3 Bridge Sites (2 sheets) (see also Drawings No. 6to No. 10). „ „ 4 Tunnel. „ „ 5 Cross Sections, cuttings and embankments. „ ~ 6 Standard Drawing —Bridges 11 ft. and 13 ft. span. „ „ 7 „ „ „ 30 ft. span. >! >; O » >) J! It. ~ „ „ J ~ ~ ~ oO it. ~ „ „ 10 „ „ Pile shoes. „ „ 11 Level crossings, cattle stops, Sec „ 12 Fencing. „ ~ 13 Timber gates. „ „ 14 Timber culverts. „ „ 15 Masonry culverts, sheets 1 and 2. „ „ 16 Inlet and outlet walls for pipe drains,