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| || capable of passing through a 4 inch ring or such hard and dry material as the Engineer may approve. The permanent way shall then be laid and securely packed up and boxed, the top ballast being of the same material as the bottom ballast but broken to pass through a 2 inch ring No sand will be allowed to be used on any consideration whatever nor material containing any admixture of clay or soil.
The foundation courses of Viaduct and Bridges shall consist of large flat bedded stones laid close together bedded and filled with mortar and brought up to a level surface to receive the masonry of the walls above and the whole work shall be executed in accordance with the drawings applicable to each structure and with the figured dimensions marked thereon.
The masonry shall consist of good flat bedded rubble work lead in level courses (which may be broken) with vertical joints. All the stones used shall be sound and free from shakes and dries laid on their natural beds closely set and bedded and pointed flush in lime mortar.
Great care must be taken in building the piers of the Viaduct to bond the work thoroughly together by means of bond stones of sufficient length to pass through the whole thickness of the piers at such frequent intervals as the Engineer may direct, and no stone shall measure less in the face then 2 feet 6 inches on bed and 1 foot in height.
All the external angles of mason work shall be finished with large size selected Rubble quoins neatly hammer dressed on heads beds and joints and neatly chisel-draughted on the external angles and where rubble string courses or coping are shewn upon the drawings they shall be neatly finished off with a chisel-draught on the external angles
The whole of the masonry shall be closely and substantially built so that the joints may be as small as possible and all joints shall be neatly pointed and drawn
Behind abutments wings & retaining walls drains shall be formed with stone shivers or larger slag carefully laid in as the work proceeds and likely packed and weeping holes 9 inches by 3 inches shall be carried through all such walls where pointed out by the Engineer
All moulded and sunk work in strings caps etc. shall be ~ wrought to the detail drawings furnished from time to time to the Contractor.
It is to be distinctly understood that the measurement of all stone work (including Ashlar) is the net size of each stone set in the work. No allowance whatever will be made for waste in working at the Quarry or elsewhere and the price must include all labor waste hoisting setting and every contingent expense.
All Brickwork shall be of old English bond throughout unless otherwise ordered by the Engineer and all parts of the work shall be throroughly [sic] bonded together. No broken bricks or pieces will be allowed to be used except what is necessary to form proper bond. Dry filling to be rough broken stone or rough screened gravel.
Brick arches shall be built in rings with the hardest selected bricks and properly bonded with a header course when any two rings form a fair radiating joint to the centre.
In building wing and retaining walls whether curves or plain in the face care is to be taken to maintain the correct batter and the perfect bond of inside and outside work.
4 ins. Glazed drain pipes shall be carried through retaining walls wing walls of bridges and abutments where pointed out by the Engineer. In road bridges drain pipes of the above dimension shall be placed at four or five feet apart at the level of roadway or Railway under the bridges.
Excavation and Mining 07:33, 11 October 2020 (UTC)07:33, 11 October 2020 (UTC)07:33, 11 October 2020 (UTC)07:33, 11 October 2020 (UTC)~
The Works consist in constructing a Tunnel of the size necessary for a single line of Railway and lining the same with Brickwork as shewn on Drawing No. 7.
The contractor will be at liberty to open cut the ground at each end of the tunnel to the extent of not more than twelve yards from the front for the purpose of building the end lengths. The width of the Excavation is on no account to be greater than the outside of the Masonry or Brickwork and the sides shall be well supported and kept open by suitable timbering until the Masonry or Brickwork is completed. The open space is then to be filled up to the original surface by layers of clay not more than One foot in thickness, each of which is to be /34 35 well and carefully punned before laying on the succeeding layer. When completely filled, the surface to be neatly trimmed to the surface and inclination of the Excavations and to be properly turfed or soiled and sown with seeds.
The Work is then to be continued from the open ends by mining in the usual way. The Excavation obtained from the Tunnel is to be tipped into the Embankment or run to spoil at the ends of the Tunnel and dressed and soiled as directed by the Engineer.
Should any portion of the Tunnel in the opinion of the Engineer not require to be bricked the same shall be excavated as nearly as possible to the net size shewn on the Drawings and no portion of the Tunnel will be permitted to be of less dimensions than shown on the drawings at anpoint but no allowance will be made for any Excavations in excess of the drawings. If on the completion of these portions of the Tunnel, the Engineer should on examination be of opinion that any pieces of rock have been so far loosened by the blasting and other mining operations as to be in danger of falling out, the Contractor shall remove such pieces of rock on being required to do so without any additional payment therefor.
The Contractor will be required to support by means of good and sufficient timbering such portions of the tunnel as may require it until the brickwork is executed. Great care must be taken to draw such timber as far as practicable so as not to build it in and the space occupied by the timber must be securely packed or rammed on the removal thereof. No allowance will be made for such timber, whether built in or drawn or for any additional excavating or packing or ramming, consequent thereon, but the Contractor must include all such items in his price for the tunnel
In no case when the tunnel shall require to be so timbered, are the excavations to becarried more than 12 feet in advance of the brickwork, but the lengths to be taken out at one time in advance of the brickwork are to be absolutely at the control of the Engineer
Safety recesses or man holes are to be made in the sides of the tunnel of the form and dimensions shewn on the Drawing.
The whole of the brick lining to be executed in every respect conformably with the Specification, and if, at any time the regular continuity of the brickwork of the tunnel shall be destroyed either in consequence of shrinking
Or settlement of any part or imperfection of the centres or by any other causes the Contractor shall amend or remove such irregularity in a satisfactory manner.
Drains are to be laid through the side walls to permit of free drainage of water, at such intervals as the Engineer may direct, and drains are to be laid down, each side of the tunnel, of the form and dimensions shewn on the Drawing.
Should the Engineer authorise the Contractor to substitute Masonry for Brickwork in any portion of the side wallos of the tunnel, such Masonry shall consist of coursed rubble, and shall be executed in all respects in conformity with the SpecificationCulverts (Drawing No. 9)The barrels of all culverts shall be built of the dimensions shewn in the Drawings or of such other dimensions as the Engineer may determine during the progress of the Works/3738The whole of the Brickwork shall be built of well burnt bricks as before specified set in mortar or in Portland Cement where ordered.The Culverts shall be built in the line of the old watercourses except where otherwise directed by the Engineer the fronts parallel to the line of Railway and built askew where required. MortarShall be composed of the best freshly burnt Warwickshire bias Lime, or other approved Lime, ground all of a quality. It shall be mixed with good engine ashes or sharp clean sand, in the proportions of two of ashes or sand and one of Lime measured dry or otherwise as the Engineer may direct, ground & mixed under rollers and thoroughly tempered with a proper quantity of pure fresh water, to a tough paste. All mortar shall be freshly mixed as required for use, and none shall in any case be used after it has been permitted to dry or partially set. ConcreteThe Concrete shall be composed of clean gravel or broken Stone (which will pass through a ring one inch and a half diameter) clean sharp Sand and Lime in the proportions of six parts gravel and one part fresh burnt Lime of the specified quality, or three parts broken Stone, two parts Sand, and one part of Lime as above. The proportions shall be ascertained
|-| ||style="text-align:center;" | '''Culverts'''<br>'''Drawing N<span style="vertical-align:super;font-size:small">o</38span>9'''39|-by measures to be provided by the Contractor. | These materials must be thoroughly mixed by being well raked together, and after having been turned over, a little pure water || The barrels of all culverts shall be added and built of the dimensions shewn in the Drawings or of such other dimensions as the Engineer may determine during the whole again thoroughly mixed by raking and turning over, then sufficient water shall be added to bring progress of the Works. The whole, when again raked, turned over, and thoroughly beaten, to a proper consistency; when placed on of the work it Brickwork shall be carefully levelled and built of well pounded burnt bricks as before specified set in mortar or tipped from a stage 10 feet high, and brought up in layers not exceeding one foot Portland Cement where ordered.The Culverts shall be built in thickness, the whole to be levelled off line of the old watercourses except where otherwise directed by the Engineer the fronts parallel to a uniform level surface before the brick or stone work is begunline of Railway and built askew where required.
|-| ||style="text-align:center;" | '''Asphalte'''|-| || All abutments, arches, spandrils, culverts and bridges shall be covered with asphalte of approvedquality ¾ of an inch thick carefully put in place hot in two layers, & made perfectly watertight, the asphalte to be carried up to the height and form shown on the drawings.
Should any timber be required for flooring or any other purposes it shall be of first class quality, sawn die square & where directed, planed, & it shall be thoroughly creosoted as the Engineer may direct.
All centring must be properly constructed the laggings for every arch will be required to be gauged to an uniform thickness, and the upper surface wrought to the true curvature of the arch, and approved by the Engineer.
All planed and wrought timber shall have four coats of best oil paint, the last coat to be of colour approved by the Engineer.
|-| ||style="text-align:center;" | '''Roads'''|-| || The surface of all roadways shall be properly formed and trimmed with an uniform curvature, having a good hard core of a sufficient thickness for it’s length and width.The metalling shall consist of a layer of Rowley rag or Clee hill Stone or other approved material of the thickness ordered. The ruts/4041shall be filled up from time to time withnew with new material and the whole surface kept smooth and free from water. the road shall in all cases shall be left in such a state that the persons or authorities interested in the same respectively will receive them under their charge.
The footpaths shall be uniformly formed and trimmed, coated with a layer of clean gravel or siftings 6 inches thick and the edge of the footpath shall be neatly finished off to the road with a sod ramp.
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