Common use of Laying Clause in Contracts

Laying. All pipe, fittings, valves, and fire hydrants shall be carefully lowered into the trench in a manner as to prevent damage to pipe materials and protective coatings and linings. Under no circumstances shall materials be dropped or dumped into the trench. The pipe and fittings shall be inspected for defects prior to installation. All lumps, blisters and excess coating shall be removed from the ▇▇▇▇ and spigot end of each pipe, and the outside of the spigot and the inside of the ▇▇▇▇ shall be wire brushed and wiped clean and dry and free from debris and lubricants before the pipe is placed in the trench. Every precaution shall be taken to prevent foreign material from entering pipe while it is being installed. After placing a length of pipe in the trench, the spigot end shall be centered in the ▇▇▇▇ and the pipe forced home and brought to correct line and grade. The pipe shall be secured in place with bedding material tamped under it. Precautions shall be taken to prevent dirt from entering the joint space. When pipe laying is not in progress, the open ends of pipe shall be sealed with a sanitary watertight plug or sanitary other means approved by the District. If water is in the trench when work resumes, the seal shall remain in place until the trench is pumped completely dry. The cutting of pipe for inserting valves, fittings or closure pieces shall be done in a neat and workmanlike manner without damage to the remaining pipe, coating or cement mortar lining so as to leave a smooth end at right angles to the axis of the pipe. Pipe shall be laid with ▇▇▇▇ ends facing in the direction of the laying, unless otherwise approved by the District. No pipe shall be laid in water, or when, in the opinion of the District, trench conditions are unsuitable. Wherever it is necessary to deflect pipe from a straight line, the amount of deflection allowed shall not exceed one-half pipe manufacturers' recommendations for mechanical, restrained and push-on joints.

Laying. All pipeThe bituminous concrete shall not be laid when the base is wet, fittings, valves, when there are pools and fire hydrants during rainfall. The surface shall be carefully lowered into the trench in a manner as to prevent damage to pipe materials kept thoroughly clean, free from dust and protective coatings and linings. Under no circumstances shall materials be dropped foreign matter, using mechanical broom or dumped into the trenchblown off by compressed air. The pipe and fittings bituminous concrete binder course as well as the wearing course shall be inspected for defects prior to installationplaced in one layer, except where reshaping work is provided. All lumps, blisters and excess coating The temperature of the mix at delivery of the plant shall be removed from approximately 140 C. The bituminous concrete shall be spread and tamped by a self-propelled paver operated by a fully- trained and experienced man. The paver shall be capable of laying to a width of 4 meters. The screed unit shall be adjusted before laying is started in order to produce a compacted layer with the required thickness as shown on the Drawings or as directed by the Engineer. During laying the screed unit shall be blocked; in other words adjustment of the thickness during laying using the so-called floating action of the screed unit shall not be authorised. The mixed material shall be supplied continuously to the machine and laid as soon as possible after delivery. The speed of paver shall be adjusted to that of the asphalt plant and hauling capacities so that the paving operation is maintained as continuously as possible during the work. The temperatures of mixes measured in the receiving ▇▇▇▇▇▇ of the asphalt paver shall not be lower than 130 C. Mixes which have a lower temperature shall be discarded. Transverse joints in the wearing course shall be offset at least 500 mm from those in the base course. Longitudinal joints shall be offset at least 150 mm. At transverse joints between existing compacted asphalt and spigot newly laid asphalt, the edge of the existing asphalt along the joint shall be neatly cut away in straight lines over a sufficient width to ensure that the full specified thickness of new asphalt is placed. The exposed edge in the existing work shall, if directed, be painted with hot bitumen or emulsion immediately in advance of placing the new work. When the asphalt layers are laid in half widths, the longitudinal joints between them shall, if directed, be treated similarly to the transverse joints. Cold joints shall be neatly cut away in straight lines except that they have been compacted to the required rate by means of a special equipment (lateral wheel). They shall be painted with hot bitumen or emulsion. The Contractor shall organise his work so that there are no exposed longitudinal joints left at the end of each pipeany day's work. Before opening to traffic, and the outside of the spigot and the inside of the ▇▇▇▇ new layer shall be wire brushed and wiped clean and dry and free from debris and lubricants before linked up with the pipe is placed in existing one by means of a chamfered edge with a slope not exceeding 8%. Before carrying on the trench. Every precaution layer this chamfered edge shall be taken to prevent foreign material from entering pipe while it is being installed. After placing a length of pipe in the trench, the spigot end shall be centered in the ▇▇▇▇ and the pipe forced home and brought to correct line and grade. The pipe shall be secured in place with bedding material tamped under it. Precautions shall be taken to prevent dirt from entering the joint space. When pipe laying is not in progress, the open ends of pipe shall be sealed with a sanitary watertight plug or sanitary other means approved by the District. If water is in the trench when work resumes, the seal shall remain in place until the trench is pumped completely dry. The cutting of pipe for inserting valves, fittings or closure pieces shall be done in a neat and workmanlike manner without damage to the remaining pipe, coating or cement mortar lining so as to leave a smooth end at right angles to the axis of the pipe. Pipe shall be laid with ▇▇▇▇ ends facing in the direction of the laying, unless otherwise approved by the District. No pipe shall be laid in water, or when, in the opinion of the District, trench conditions are unsuitable. Wherever it is necessary to deflect pipe from a straight line, the amount of deflection allowed shall not exceed one-half pipe manufacturers' recommendations for mechanical, restrained and push-on jointscut away.

Laying. All pipethe masonry work shall be carried out to specified dimension, fittingslines and levels indicated on the drawings or as directed by the Engineer-In-Charge and a good bond shall be provided throughout the work both longitudinally and transversely. Double scaffolding of adequate strength shall be provided for all types of loads likely to come on them during construction. No holes allowed in masonry for scaffolding. During rains and frosty weather, valves, and fire hydrants the work shall be carefully lowered into the trench in a manner covered so as to prevent damage any mortar being washed away. Any anchors, wall plugs, accessories, flashings and other items required to pipe materials be built in with masonry shall be provided in their correct position as the masonry work progresses. Before new work is started, all loose mortar shall be removed and protective coatings the exposed joints shall be thoroughly cleaned before laying new work. Every brick shall be thoroughly soaked in water before using in work. Before starting the brick masonry the concrete surfaces e.g. plinth beams, columns, slabs, chajjas, lofts etc. shall be thoroughly hacked and liningswashed to remove all mud, dirt, loose particles etc. Under and a thin coat of cement slurry shall be applied over concrete surfaces when fresh masonry is to be started on or against old masonry, the surface of the old masonry shall be thoroughly cleaned and washed to remove all ▇▇▇▇ deposits loose mortar mud and dirt etc. Brickwork shall be laid in English Bond with frog upwards unless otherwise specified. In exposed brickwork, selected bricks of the specified class shall be used for the face work. No half or quarter brick shall be used except as closures. Nor more than ten courses shall be raised in a day and no circumstances part of the work shall materials be dropped or dumped into the trenchraised more than 1 m. above another at any time. The pipe and fittings size of the brick shall be inspected 22.5 x 11.5 x 7.5 cm. unless otherwise specified; but tolerance upto ± 3mm. in each direction shall be permitted, However, bricks conforming in size to IS 1077 could be used. Bricks shall be provided with frogs. Only full size bricks shall be used for defects prior masonry work. Brick bats shall be used only with permission of the Engineer-In-Charge to installationmake up required wall length or for bonding. All lumpsSample bricks shall be submitted to the Engineer-In-Charge for approval and brick supplied shall confirm to approved samples. If demanded by Engineer-In-Charge, blisters and excess coating brick sample shall be tested as per IS 3495 by the Contractor at no extra cost to Employer. Brick rejected by Engineer-In-Charge shall be removed from the ▇▇▇▇ site of works within 24 hours. Each brick shall be set with both bed and spigot end vertical joints filled with mortar as per IS 2250. Joints shall not be less than 6 mm. and not more than 10 mm. in thickness and are to be full of mortar, close, well finished and neatly struck. All joints shall be adjusted to their final position in the wall while the mortar is still soft and plastic. All joints shall be raked out by raking tools when mortar is still green to a depth of 12 mm. to ensure good key to plaster or pointing. Where plastering or pointing is not required to be done, the joints shall be uniform in thickness, struck flush and finished at the time of laying. The face of brick work shall be cleaned daily and all mortar droppings removed. The surface of each pipe, and the outside of the spigot and the inside of the ▇▇▇▇ course shall be wire brushed and wiped clean and dry and free from debris and lubricants thoroughly cleaned of all dirt before another course is laid on top. If the pipe is placed mortar in the trench. Every precaution lower course has begun to set, the joints shall be taken raked out to prevent foreign material from entering pipe while it a depth of 12 mm. before another course is being installedlaid. After placing a length of pipe Miscellaneous inserts in the trenchmasonry e.g. sleeves, the spigot end wall ties, anchors, conduits, structural steel, steel lintels etc. shall be centered in installed by the ▇▇▇▇ and the pipe forced home and brought to correct line and gradeContractor. The pipe Openings etc. shall be secured in place with bedding material tamped under itprovided as shown on the drawings. Precautions Chases, pockets etc. shall be taken provided as shown on the drawing to prevent dirt from entering receive windows, louvers, doorframes, circular openings for exhaust fans etc. Curing shall constantly keep the joint spacebrick masonry moist on all faces for a minimum period of seven days. When pipe laying is not in progress, Brickwork done during the open ends of pipe day shall be sealed with a sanitary watertight plug or sanitary other means approved by suitably marked indicating the District. If water date on which the work is in the trench when work resumes, the seal shall remain in place until the trench is pumped completely dry. The cutting of pipe for inserting valves, fittings or closure pieces shall be done in a neat and workmanlike manner without damage to the remaining pipe, coating or cement mortar lining so as to leave keep a smooth end at right angles to the axis of the pipe. Pipe shall be laid with ▇▇▇▇ ends facing in the direction of the laying, unless otherwise approved by the District. No pipe shall be laid in water, or when, in the opinion of the District, trench conditions are unsuitable. Wherever it is necessary to deflect pipe from a straight line, the amount of deflection allowed shall not exceed one-half pipe manufacturers' recommendations for mechanical, restrained and push-watch on jointscuring period.