1.0 SCOPE OF WORK :
1.1 The work covered under this specifications consists of supplying and erecting stone masonry walls with available best quality of stone in strict compliance with this specifications and applicable drawings.
2.0 RANDOM RUBBLE MASONRY :
2.1 Material : The rubble shall be of the best quality trap/granite/ballast stones obtained from the approved quarry. The sample of the stone, to be used shall be got approved from the Engineer-in-Charge. All stones shall, generally, be freshly quarried and shall be sound, dense, hard, free from segregation, cracks, weathered portions and other structural defects or imperfections, tending to off set soundness and strength. The percentage of water absorption shall generally not exceed 5% by weight. All stones shall be wetted before use. Stones shall be neatly worked to requisite sections and forms and shall have fully dressed beds and joints. At least 50% of the stones shall be 0.015 cum. in content when reckoned individually. The length of stones for stone masonry shall not exceed three times the height and the breadth or base shall not be greater than three fourth the thickness of wall, or not less than 15 cm. The height of stone may be up to 30 cm. Stones shall be laid on the natural beds and shall run sufficiently inside the wall thickness. No hollow space shall be left out and inter spaces of stones being filled with mortar and stone chips, driven hard and not with mortar only.
2.2 All mortar to be used shall be of the type and proportion mentioned in the item. Cement, sand and water to be used shall conform to their relevant specifications as described under cement concrete. The masonry shall be laid to plumb, lines levels, curves, shapes as shown in drawings. All required holes for passage of water or pipes are to be embedded during construction as specified.
2.3 All stones shall be wetted before laying in masonry. Concrete surfaces of columns, beams, lintels, chajjas etc. coming in contact with masonry shall be properly chipped, washed and wetted before start of masonry work. The concrete surface coming in contact of masonry shall be given a thick coat of cement slurry as the masonry work progresses in height. Clean chips and spawls carefully selected to fit in the space shall be wedged into the mortar joints and beds wherever necessary to avoid thick beds or joints or mortar. However, proper shaping and dressing of stones shall be done prior to their laying in masonry and hammering shall not be resorted to often after the stones are laid in position. The bond stones shall be used in every square meter area of masonry wall and shall extend from front to back to thin walls having width of 600 mm. and shall overlap by at least 150 mm. in walls having thickness more than 600 mm. when laid from both sides. When the work has to be started on the old or the one completed a long while ago or in the previous working seasons, care shall be taken to roughen and clean old surface satisfactorily without disturbing the masonry before laying the new. It shall be wetted before laying the bedding mortar.
2.4 When practicable, the whole masonry in any structure shall be carried out upto a uniform level throughout. But when breaks are unavoidable in carrying the work continuously in uniform level, sufficiently long steps shall be left. All junction of walls shall be formed at the time when walls are being built. Cross walls should be carefully bonded into the main walls. All masonry built in cement mortar shall be kept continuously wet for 10 days from the date of laying. Should the mortar perish i.e. becomes dry, white or powder through neglect of watering and if the masonry shows hollow joints or non adherence of mortar to the stones or if the work does not conform to drawings and specifications, the work shall be pulled down and rebuilt by the contractor at his own cost and risk. All masonry shall be thoroughly cleaned and washed down on completion and all stains, adhering mortar removed from the surface and raking of joints carried out as the scaffolding is being lowered and removed. Holes left in masonry for supporting scaffolding shall be filled and made good before pointing/ plastering.
3.0 KHANDKI FACING STONE MASONRY :
3.1 The specifications for Random rubble masonry as given in item No. 10.2 shall generally apply to these for quality of stones, workmanship etc. except for the following:
3.2 The face of the stones shall be square/ rectangular in shape and shall be so dressed alround that those can be set on proper bases and shall render uniform joints. The stones may have bushing on the face but shall not project more than 40 mm. The external faces shall be laid in courses of about 200 mm. height or as specified and the internal face shall be finished with rubble backing.
3.3 The other specifications, mode of measurements etc. shall be same as per specifications for R.R. Masonry mentioned above.
4.0 MODE OF MEASUREMENT :
4.1 All stone masonry shall be measured in cubic metres as actually done. All openings for windows, doors, lintels etc. shall be deducted to get the net quantity of actual work done. Openings or chases required for P.H. and electrical inserts less than 0.1 sqm. and bearings of precast concrete members shall not be deducted. The unit rate for masonry shall include cost of stones, dressing, mortar, simultaneous flush
pointing, corner stones, bond stones, scaffolding , labour, curing, forming or leaving holes for fixing or building in hold fasts, forming chases and grooves and al
operations including tools & appliances of any sort or kind requisite for the completion of the work. etc.
“S P E C I F I C A T I O N S” F O R
(RUBBLE STONE HARD CORE)
1.0 SCOPE :
1.1 The work covered under this specification includes all type of soling work by rubble stone laid under floor or foundations.
2.0 RUBBLE SOLING :
2.1 Rubble used for soling under floors, foundations etc. shall be hard, durable rock, free from veins, flaws and other defects. The quality and size of the ruble shall be subject to the approval of the Engineer-In-charge.
2.2 Rubble shall be hand packed as directed by Engineer-In-charge. This shall be laid closely in position on the well prepared sub grade. All interstices between the stones shall be wedged in with smaller stones of suitable size well driven to ensure tight packing and complete filling of interstices. Such filling shall be carried out simultaneously with the placing in position of rubble stones and shall not lag behind.
2.3 Small interstices shall be filled with murrum and well watered and rammed with mechanical (heavy) rammer or hand rammer as approved by the Engineer-In-charge. Care shall be excercised to avoid damage to the grade beams and columns and trench wall edges while ramming.
3.0 MEASUREMENT :
3.1 The unit rate measurement shall be square meter for the specified thickness of rubble soling.
3.2 The linear dimensions shall be measured upto two places of decimals of a metre and are worked out correct to the two places of decimals of a square metre.
3.3 Plan areas of soling work actually done limiting to the dimensions as per drawings shall be measured for payment.
3.4 The rate shall include all the materials, labour, preparation of surfaces, watering, consolidation etc.
“S P E C I F I C A T I O N S” FOR
(KOTA STONE FLOORING)
1.0 SCOPE :
1.1 The work covered under this specification consists of providing and laying at all levels and floors kota stone tiles in flooring, skirting, dado and Sills in accordance with these specifications and relevant drawings.
2.0 APPLICABLE CODES & SPECIFICATIONS :
2.1 The relevant I.S. specifications, standards and codes given below are made a part of this specification. All standards, specifications, code of practices referred to herein shall be the latest edition including all applicable amendment, revisions and additional publications.
2.2 List of Indian Standards :
No. I.S. No. I.S. Partculars
1. I.S. 1200
(Part-XI) Method of measurements building and civil engineering work.
3.0 KOTA STONE FLOORING :
3.1 Kota stone shall be of best quality and of thickness specified and obtained from approved sources. Kota stone shall be of sizes stipulated in the items of schedule of quantities.
3.2 The stone shall have to be machine cut/ hand cut as specified and double machine polished wherever required as per item. The edges to be pointed shall be true to line and dressed to the depth all around.
3.3 The stones shall be hard, sound, free from cracks, veins and other defects and of uniform colour.
3.4 The sample of stone shall be submitted for approval of Engineer-In-charge and all the stones incorporated in the work shall conform to the approved samples.
3.5 Before laying the flooring surface to be paved shall be thoroughly hacked, cleaned of all mortar scales, concrete lumps, loose materials etc. Unless and until the surface is approved by the Engineer-In-charge the paving shall not be taken in hand.
3.6 If found necessary the permission shall be given by the Engineer-In-charge to dress the stone at site.
3.7 A bedding of 20 mm thick with cement mortar (1:4) shall be laid evenly and to the required slope as directed. The stones shall then be truly and evenly set in a thin paste of neat cement applied to sides, bottom and to the prepared base. The stone shall then be tamped down with wooden mallet until they are exactly in true plane and line with the adjacent stone.
3.8 All stones shall be extended up -to the masonry wall and under side of the plaster. The stone shall be close jointed and joints shall be as thin as possible.
3.9 The cement that oozes out through the joints to the surface shall be immediately wiped clean. The joints shall then be filled with matching cement and finished neatly.
3.10 The entire surface of flooring shall be re-polished with machine to satisfaction of the Engineer-In-charge. The edges of stones wherever exposed shall be machine cut.
3.11 The flooring shall be cured for 7 days.
4.0 KOTA STONE SKIRTING :
4.1 They shall be laid against a bedding of cement mortar 1:3 to the full height to a true plane, level and plumb. The workmanship shall be similar to flooring. 4.2 The skirting shall be laid projected beyond the finished plastered surfaces as
directed.
4.3 The continuous horizontal grooves at the top of skirting shall be provided if specified in the drawing or as directed by the Engineer-In-charge. No extra will be paid for grooves.
4.4 The skirting surfaces shall be re-polished with hand to satisfaction of the Engineer-In-charge.
4.5 The skirting shall be cured for 7 days.
5.0 KOTA STONE SILLS AND COPING AND COUNTER TOPS :
5.1 The stones shall be cut to the required size as approved by the Engineer-In- charge. The stones shall have to be machine cut and double machine polished wherever specified. The edges to be pointed shall be true to line and dressed to the required depth all around.
5.2 All the exposed edges shall be neatly polished to give a neat appearance. 5.3 These items shall be laid on a bedding of 20 mm thick cement mortar 1:4 to a
true plane, level or slopes all as per relevant drawings.
5.4 The workmanship shall be similar to Kota stone flooring described above. The sills and copings should project beyond the finished plastered surface as show in drawing.
5.5 Continuous horizontal grooves wherever specified shall be provided as per drawings and quoted rate is deemed to include for the same.
5.6 The surface shall be re polished with hand to entire satisfaction of the Engineering-In-charge. The entire work shall be cured for 7 days.
6.0 KOTA STONE CLADDING :
6.1 Only approved quality, size and colour machine cut and machine polished Kota stone 40 mm thick and 100 mm wide shall be used.
6.2 Maximum thickness of joints shall be 15 mm thick for horizontal as well as vertical and the joints shall be filled with cement mortar 1:4.
6.3 Vertical joints shall be staggered and both vertical and horizontal shall be finished by making 15 mm x 15 mm grooves.
6.4 Brass clamps and pins of approved quality size and make shall be provided at the meeting of two horizontal Kota stone slabs both way horizontally and vertically staggered @ one number per square metre.
6.5 Curing of the joints shall be done with clean water for a minimum period of 10 days.
6.6 The rate shall be including of cost of material, double scaffolding if required, laying, finishing, making grooves, curing and cleaning of spashes on kota stones.
7.0 KOTA STONE TREADS / RISERS:
7.1 The specifications mentioned for Kota stone flooring shall be generally applicable for this item.
8.0 MODE OF MEASUREMENT :
8.1 Unit of measurement shall be square metre.
8.2 Measurement for flooring shall be for the actual area covered from face of skirting.
8.3 Deduction will be made for columns, projections, equipment foundations, trenches, openings etc.
8.4 Measurement shall be for the actual area of skirting, dado, sills, coping etc. and deduction shall be made for the areas not covered by these.
SPECIFICATION FOR