From b055edbbc0725f71a54bba1dcdce1aa03d758abd Mon Sep 17 00:00:00 2001 From: Kshitij <160704796+kshitij-ka@users.noreply.github.com> Date: Mon, 4 May 2026 15:10:53 +0530 Subject: [PATCH] feat: add 10 new standards and chunks for steel, wood, electrical categories. --- data/processed/standards.json | 811 ++++++++++++++++++++++++---------- 1 file changed, 571 insertions(+), 240 deletions(-) diff --git a/data/processed/standards.json b/data/processed/standards.json index 046b90e..dfe5074 100644 --- a/data/processed/standards.json +++ b/data/processed/standards.json @@ -193,8 +193,11 @@ "keywords": [ "cement", "portland", - "hardening", "rapid", + "hardening", + "early", + "strength", + "quick", "setting", "physical", "chemical" @@ -291,15 +294,15 @@ "standard_id": "IS 12330: 1988", "title": "Sulphate Resisting Portland Cement", "category": "Cement and Concrete", - "summary": "Requirements for the following concrete masonry building units which are used in construction of loadbearing and partition walls: a) Hollow (open and closed cavity) load bearing concrete blocks. b) Hollow (open and closed cavity) non-load bearing concrete blocks, and c) Solid load-bearing concrete blocks. Note—Concrete masonry units are used for both load-bearing and non-load bearing walls, for partitions and panel walls, as backing for other types of facing materials, for piers, pilasters and c", + "summary": "Requirements for sulphate resisting Portland cement for use in concrete subject to attack by sulphate soils and water. Covers chemical and physical requirements including C3A content.", "keywords": [ - "cavity", - "block", - "walls", - "bearing", - "closed", - "calculated", - "concrete" + "sulphate", + "cement", + "portland", + "resisting", + "chemical", + "physical", + "tricalcium" ], "key_sections": { "Delivery": "Packed in specified bags of 50 kg net or in bulk with tolerances specified in the standard. TABLE1 CHEMICAL REQUIREMENTS FOR SULPHATE RESISTING PORTLAND CEMENT Sl No. Characteristic Requirement (1) (2) (3) i) Ratio of percentage if lime to percentages of silica, alumina Not greater than 1.02 and and iron oxide when calculated by the formula not less than 0.66 ii) Insoluble residue, percent by mass Not more than 4 iii) Magmesia, percent by mass Not more than 6 iv) Total sulphur content calculated as sulphuric anhydride (SO3) percent by mass Not more than 2.5 v) Tricalcium aluminate (C3A), percent by mass Not more than 5 vi) Tetracalcium alumino ferrite phase twice the tricalcium aluminate Not mor ethan 25 (C4AF+2C3A), percent by mass vii) Total loss on ignition, percent by mass Not more tha", @@ -331,15 +334,18 @@ "standard_id": "IS 2185 (Part 2): 1983", "title": "Concrete Masonry Units", "category": "Cement and Concrete", - "summary": "Covers the requirements of autoclaved cellular (aerated) concrete blocks having density up to 1 000 kg/ m3. Note — Autoclaved means team curing of concrete products, sandlime bricks, asbestos cement products, hydrous calcium silicate insulation products, or cement in an autoclave at maximum ambient temperatures generally between 170 and 215oC.", + "summary": "Requirements for lightweight hollow and solid concrete masonry units (blocks) with density up to 1800 kg/m3. Part 2 covers lightweight blocks including density around 1200 kg/m3 for load-bearing and non-load-bearing walls.", "keywords": [ - "units", - "bearing", - "hollow", - "walls", "lightweight", "concrete", - "grade" + "block", + "hollow", + "masonry", + "density", + "1200", + "1000", + "walls", + "partition" ], "key_sections": { "Scope": "Covers the requirements of autoclaved cellular (aerated) concrete blocks having density up to 1 000 kg/ m3. Note — Autoclaved means team curing of concrete products, sandlime bricks, asbestos cement products, hydrous calcium silicate insulation products, or cement in an autoclave at maximum ambient temperatures generally between 170 and 215oC. 2. Dimensions and Tolerances 2.1 Nominal Dimensions Length 400, 500 or 600 mm Height 200, 250 or 300 mm Width 100, 150, 200 or 250 mm Note 1— Actual dimensions shall be 10mm short of the nominal dimensions (or 6 mm short in special cases where finer jointing is specified). Note 2 — In addition, block shall be manufactured in half lengths of 200, 250 or 300 mm to correspond to the full lengths. 2.2 Tolerance — Not more than 5 mm in length and 3 mm in ", @@ -351,15 +357,19 @@ "standard_id": "IS 2185 (Part 3): 1984", "title": "Concrete Masonry Units", "category": "Cement and Concrete", - "summary": "Requirements for reinforced concrete fence posts for general purposes. Recommendations for the provisions of wire holes and their spacing, as well as the erection of post-and-wire fence have also been included. Reinforced lightweight concrete fence posts and prestressed concrete fence posts are not covered.", + "summary": "Requirements for autoclaved aerated concrete (AAC) masonry blocks with density around 500-600 kg/m3. Part 3 covers aerated blocks for external walls. NOT for slabs or roofing.", "keywords": [ - "posts", - "fence", - "strainer", "autoclaved", + "aerated", "concrete", - "post", - "cellular" + "block", + "masonry", + "unit", + "lightweight", + "AAC", + "cellular", + "wall", + "external" ], "key_sections": { "Scope": "Requirements for reinforced concrete fence posts for general purposes. Recommendations for the provisions of wire holes and their spacing, as well as the erection of post-and-wire fence have also been included. Reinforced lightweight concrete fence posts and prestressed concrete fence posts are not covered. 2. Classification a) Line Posts— Line posts are intermediate posts forming the majority in a post-and-wire system and are intended to carry the fencing wire between the strainer posts. b) Strainer Posts— Posts notched on three sides and used with struts or braces as strainers at the corners or ends, or at intermediate positions in a line of fence. c) Strut or Brace— Member used in inclined position for supporting the strainer post. 3. Shape and Dimension 3.1 Shall be square, rectangular" @@ -448,15 +458,15 @@ "standard_id": "IS 6072: 1971", "title": "Autoclaved Reinforced Cellular Concrete Wall Slabs", "category": "Cement and Concrete", - "summary": "Requirements for autoclaved reinforced cellular concrete floor and roof having density above 450 and up to 1 000 kg/m3", + "summary": "Requirements for autoclaved reinforced cellular concrete wall panels used in building construction. Distinct from floor/roof slabs (IS 6073).", "keywords": [ - "cellular", "autoclaved", - "over", + "reinforced", + "cellular", "concrete", - "compressive", - "groove", - "kgf" + "wall", + "panel", + "external" ], "key_sections": { "Finish": "Tongue at one side and groove on the other side. Alternatively groove on both sides for filling with cement mortar. Longitudinal edges shall be chamfered. 7. Physical Properties 7.1Density — Range as specified in 3. 7.2Dry Shrinkage — Not more than 0.09 percent. 7.3Residual water content at the time of delivery shall be declared by the manufacturer. 7.4Fire Resistance — Not less than 2 hours. 7.5Compressive Strength and Thermal Conductivity— Class Compressive Thermal Strength, Conductivity Min Max (kgf/cm2) (kcal/m/h/oC) A 70 0.36 B 60 0.32 C 50 0.26 D 35 0.21 E 20 0.18 Note 1 — For methods of tests, refer to IS 3809 1979 Specification for fire resistance test for structures (first revision) and relevant partsof IS 6441 Methods of test for autoclaved cellular concrete products . Note 2 — F", @@ -471,15 +481,18 @@ "standard_id": "IS 6073: 1971", "title": "Autoclaved Reinforced Cellular Concrete Floor And Roof Slabs", "category": "Cement and Concrete", - "summary": "5.2Tolerances — For 500 mm and below, ± 2 mm over 500 mm, ± 5 mm. Note — For form tolerances for wall slabs, refer to Table 1 of the standard. 6. Finish — Tongue at one side and groove on the other side. Alternatively groove on both sides for filling with cement mortar. Longitudinal edges shall be chamfered. 7. Physical Properties 7.1 Density — Range as specified in 3. 7.2 Dry Shrinkage — Not more than 0.09 percent. 7.3 Residual water content at the time of delivery shall be declared by the manu", + "summary": "Requirements for autoclaved reinforced cellular concrete SLABS for floor and roof construction. Slab elements, not blocks or wall panels. Different from IS 6072 wall panels.", "keywords": [ - "cellular", "autoclaved", - "groove", - "slabs", - "conductivity", - "fire", - "concrete" + "reinforced", + "cellular", + "concrete", + "slab", + "floor", + "roof", + "roofing", + "structural", + "precast" ], "key_sections": { "Finish": "Tongue at one side and groove on the other side. Alternatively groove on both sides for filling with cement mortar. Longitudinal edges shall be chamfered. 7. Physical Properties 7.1 Density — Range as specified in 3. 7.2 Dry Shrinkage — Not more than 0.09 percent. 7.3 Residual water content at the time of delivery shall be declared by the manufacturer. 7.4 Fire Resistance — Not less than 2 hours. 7.5 Compressive Strength and Thermal Conductivity— Class Compressive Thermal Strength, Min Conductivity Max (kgf/cm2) (kcal/m/h/oC) A 70 0.36 B 60 0.32 C 50 0.26 D 35 0.21 E 20 0.18 Note 1 — For methods of tests, refer to IS 3809 : 1979 Specification for fire resistance test for structures (first revision), and relevant parts of IS 6441 Part 1 to 9 Methods of test for autoclaved cellular concrete " @@ -1375,15 +1388,16 @@ "standard_id": "IS 1128: 1974", "title": "Limestone (Slab And Tiles)", "category": "Stones", - "summary": "(First Revision) TABLE 1 STANDARD SIZES OF LIMESTONE SLABS AND TILES Length Breadth Thickness (1) (2) (3) 15 to 60 cm in stages of 5 cm 15 to 60 cm in stages of 5 cm 15 to 95 mm in stages of 10mm 60 to 100 cm in stages of 10 cm 30 to 100 cm in stages of 10 cm - do- 100 to 150 cm in stages of 10 cm 30 to 100 cm in stages of 10 cm 25 to 95 mm in stages of 10 mm Sl.No. Characteristics Requirements (1) (2) (3) i) Water absorption 0.15 percent by weight ii) Transverse strength 70 kgf/cm2 iii) Durabil", + "summary": "Requirements for polished limestone slabs and tiles used for flooring and cladding in building construction.", "keywords": [ - "stages", - "stones", - "natural", - "durability", - "determination", - "transverse", - "building" + "limestone", + "slab", + "tile", + "polished", + "flooring", + "cladding", + "building", + "stone" ], "key_sections": {}, "content": "IS 1128: 1974 Limestone (Slab And Tiles)\n(First Revision)\nTABLE 1 STANDARD SIZES OF LIMESTONE SLABS AND TILES Length\nBreadth\nThickness\n(1)\n(2)\n(3)\n15 to 60 cm in stages of 5 cm\n15 to 60 cm in stages of 5 cm\n15 to 95 mm in stages of 10mm\n60 to 100 cm in stages of 10 cm\n30 to 100 cm in stages of 10 cm - do-\n100 to 150 cm in stages of 10 cm\n30 to 100 cm in stages of 10 cm\n25 to 95 mm in stages of 10 mm\nSl.No.\nCharacteristics\nRequirements\n(1)\n(2)\n(3)\ni)\nWater absorption\n0.15 percent by weight ii)\nTransverse strength\n70 kgf/cm2 iii)\nDurability\nShall not develop signs of spalling, disintegration of cracks.\nNote — For methods of tests, refer to IS 1121(Part 2):1974 Methods of test for determination of strength properties of natural\nbuilding stones.Part 2 Transverse strength (first revision), IS 1124:1974 Method of test for determination for water absorption, apparent specific gravity and porosity of natural building stones (first revision) and IS 1126:1974 Method of test for determination\nof durability of natural building stones (first revision)" @@ -1626,15 +1640,18 @@ "standard_id": "IS 2691: 1988", "title": "Burnt Clay Facing Bricks", "category": "Wood Products for Building", - "summary": "Covers dimensions, quality and strength, and methods of sampling and test for burnt clay paving bricks for use in construction of pavements.", + "summary": "Requirements for burnt clay facing bricks with high quality external appearance used for exposed decorative brickwork on building facades.", "keywords": [ - "bricks", - "paving", - "clay", - "nil", + "facing", + "brick", "burnt", - "average", - "pavements" + "clay", + "appearance", + "exposed", + "brickwork", + "decorative", + "quality", + "finish" ], "key_sections": { "Scope": "Covers dimensions, quality and strength, and methods of sampling and test for burnt clay paving bricks for use in construction of pavements.", @@ -1669,14 +1686,16 @@ "standard_id": "IS 3952: 1988", "title": "Burnt Clay Hollow Bricks For Walls And Partitions", "category": "Wood Products for Building", - "summary": "(Second Revision)", + "summary": "Requirements for burnt clay hollow bricks used for non-load-bearing partition walls in buildings. Different from solid load-bearing bricks.", "keywords": [ - "burnt", - "clay", "hollow", - "bricks", - "walls", - "partitions" + "clay", + "brick", + "partition", + "non-load-bearing", + "wall", + "burnt", + "lightweight" ], "key_sections": {}, "content": "IS 3952: 1988 Burnt Clay Hollow Bricks For Walls And Partitions\n(Second Revision)" @@ -1765,18 +1784,20 @@ "standard_id": "IS 7556: 1988", "title": "Burnt Clay Jallies", "category": "Wood Products for Building", - "summary": "Covers the machine-pressed clay interlocking roofing tiles of the ‘Mangalore Pattern.’", + "summary": "Covers burnt clay jalli (lattice/screen) units used decoratively on building facades for ventilation and aesthetic purposes.", "keywords": [ - "lugs", - "tile", - "eave", - "batten", - "roofing", - "class", - "soud" + "jalli", + "screen", + "lattice", + "clay", + "perforated", + "ventilation", + "facade", + "decorative", + "burnt" ], "key_sections": { - "Scope": "Covers the machine-pressed clay interlocking roofing tiles of the ‘Mangalore Pattern.’", + "Scope": "Covers burnt clay jalli elements — decorative lattice screens used on building facades for ventilation and ornamentation.", "Classification": "Class AA and Class A with characteristics given in Table 1. TABLE 1 CLASSIFICATION OF ROOFING TILES Sl.no. Characteristic Requirement Class AA Class A i) Water absorption percent, Max 18 20 ii) Breaking load, kN, Min a)Average 1.0 (for 410 × 235 mm) 0.80(for 410 × 235 mm) 1.10 (for 420 × 250 mm 0.90 (for 420 × 250 mm and 425 × 260 mm) and 425 × 260 mm) b) Individual 0.90 (for 410 × 235 mm) 0.68 (for 410 × 235 mm) 1.00 (for 420 × 250 mm 0.78 (for 420 × 250 mm and 425 × 260 mm) and 425 × 260 mm) 3. General Quality. 3.1. Shall be free from irregularities, such as twists, bends, cracks and laminations. The roofing tile shall be free from impurities like particles of stone, lime or other foreign materials. When struck, the tile shall give a characteristic ringing soud and when broken the fractu", "Shape": "Placed on either face on a plane surface, gap at corners shall not exceed 6 mm.", "Lugs": "At least 2 batten lugs and 2 eave lugs of thickness not less than 15 mm at bottom and 10 mm at top shall be provided. Projection shall be 7 to 12 mm for batten lugs and not less than 10 mm for eave lugs.", @@ -1815,15 +1836,16 @@ "standard_id": "IS 1464: 1992", "title": "Clay Ridge And Ceiling Tiles", "category": "Wood Products for Building", - "summary": "Requirements for dimensions, quality and strength for clay flooring tiles.", + "summary": "Requirements for clay ridge tiles and ceiling tiles used at ridge junctions and overhead in building construction.", "keywords": [ - "thick", - "tiles", - "class", - "flooring", - "individual", - "along", - "fluted" + "clay", + "ridge", + "tile", + "ceiling", + "roofing", + "junction", + "burnt", + "overhead" ], "key_sections": { "General Quality": "shall be free from irregularities, such as twists, bends, cracks, flaws, laminations and imperfections. Faces of tiles shall be plain, grooved fluted or figured as specified and the edges shall be square. 4. Dimensions i) 150 × 150 × 15 mm ii) 150 × 150 × 20 mm iii) 200 × 200 × 20 mm iv) 200 × 200 × 25 mm v) 250 × 250 × 30 mm Depth of the grooves or frogging on the underside shall not exceed 3 mm.", @@ -1884,15 +1906,17 @@ "standard_id": "IS 2690 (Part 2): 1992", "title": "Burnt Clay Flat Terracing Tiles", "category": "Wood Products for Building", - "summary": "Covers machine-pressed, wire-cut, or hand-made rectangular burnt clay tiles used for lining irrigation canals and for drainage channels (other than sewage works).", + "summary": "Requirements for burnt clay flat terracing tiles used as flooring on roof terraces. Part 2 of IS 2690.", "keywords": [ - "burnt", "clay", - "hand", - "tiles", - "lining", - "drainage", - "class" + "flat", + "terracing", + "tile", + "roof", + "terrace", + "flooring", + "burnt", + "part2" ], "key_sections": { "Scope": "Covers machine-pressed, wire-cut, or hand-made rectangular burnt clay tiles used for lining irrigation canals and for drainage channels (other than sewage works).", @@ -1973,15 +1997,17 @@ "standard_id": "IS 13317: 1992", "title": "Clay Roofing Country Tiles, Half Round And Flat Tiles", "category": "Wood Products for Building", - "summary": "For detailed information, refer to IS 13317:1992 Specification for clay roofing country tiles, half round and flat tiles. Half Round Tiles Flat Tiles", + "summary": "Requirements for country pattern clay roofing tiles (half-round and flat pattern) as distinct from Mangalore pattern tiles covered by IS 654.", "keywords": [ - "plaster", - "gypsum", - "boards", - "tiles", - "premixed", - "half", - "round" + "country", + "pattern", + "clay", + "roofing", + "tile", + "half-round", + "flat", + "non-Mangalore", + "traditional" ], "key_sections": {}, "content": "IS 13317: 1992 Clay Roofing Country Tiles, Half Round And Flat Tiles\nFor detailed information, refer to IS 13317:1992 Specification for clay roofing country tiles, half round and flat tiles.\nHalf Round Tiles\nFlat Tiles 2.1\nSECTION 5\nGYPSUM BUILDING\nMATERIALS CONTENTS\nTitle\nPage\nIS\n2095\nGypsum plaster boards\n(Part I) : 1996\nPlain gypsum plaster boards (second revision)\n5.3\n(Part 3) : 1996\nReinforced gypsum plaster boards (second revision)\n5.5\nIS\n2547\nGypsum building plaster\n(Part I) : 1976\nExcluding premixed light weight plaster (first revision)\n5.7\n(Part 2) : 1976\nPremixed light weight plaster (first revision)\n5.9\nIS\n2849 : 1983\nNon load bearing gypsum partition blocks\n5.10\n(Solid and hollow types)\nIS\n8272 : 1984\nGypsum plaster for use in the manufacture of fibrous\n5.11 plaster boards (first revision)" @@ -2095,15 +2121,15 @@ "standard_id": "IS 8272: 1984", "title": "Gypsum Plaster For Use In The", "category": "Gypsum Building Materials", - "summary": "Details of the zonal distribution of common commercial timbers of India, classified according to their various uses, and information on the availability of these timbers and on some of their important properties.", + "summary": "Requirements for gypsum plaster specifically used in the manufacture of fibrous plaster products for ornamental and architectural applications. Different from building plaster.", "keywords": [ - "pradesh", - "timber", - "north", - "zone", - "coniferous", - "west", - "poles" + "gypsum", + "plaster", + "fibrous", + "manufacture", + "casting", + "fibrous-plaster", + "ornamental" ], "key_sections": { "Scope": "Details of the zonal distribution of common commercial timbers of India, classified according to their various uses, and information on the availability of these timbers and on some of their important properties.", @@ -2225,15 +2251,16 @@ "standard_id": "IS 1331: 1971", "title": "Cut Sizes Of Timbers", "category": "Timber", - "summary": "Covers the species, grades, requirements and treatments for timber used in the construction of cooling towers.", + "summary": "Preferred cut sizes and dimensions of timber for joinery and furniture applications.", "keywords": [ "timber", - "pinus", - "chrome", - "rot", - "prohibited", - "radiata", - "fir" + "cut", + "sizes", + "sawn", + "joinery", + "furniture", + "standard", + "dimensions" ], "key_sections": { "Scope": "Covers the species, grades, requirements and treatments for timber used in the construction of cooling towers.", @@ -2752,15 +2779,17 @@ "standard_id": "IS 1237: 1980", "title": "Cement Concrete Flooring Tiles", "category": "Floor, Wall, Roof Coverings and Finishes", - "summary": "Requirements of naturally occurring sands and crushed gravel sands used in mortars for internal wall and ceiling plastering, and external plastering using mixes of lime, cement, composite lime-cement, activated lime pozzolana mixture (ALMP) or gypsum with or without admixtures and sand.", + "summary": "Requirements for cement concrete flooring tiles used in industrial and commercial floor applications.", "keywords": [ - "sands", - "sand", - "grading", - "wear", - "crushed", - "organic", - "impurities" + "cement", + "concrete", + "flooring", + "tile", + "floor", + "industrial", + "commercial", + "plain", + "terrazzo" ], "key_sections": { "Scope": "Requirements of naturally occurring sands and crushed gravel sands used in mortars for internal wall and ceiling plastering, and external plastering using mixes of lime, cement, composite lime-cement, activated lime pozzolana mixture (ALMP) or gypsum with or without admixtures and sand. 2. Quality of sand 2.1 General — The sand shall be hard, durable, clean and free from adherent coatings and organic matter and shall not contain clay, silt and dust more than specified. 2.2 Deleterious Materials 2.2.1 The sand shall not contain any harmful impurities, such as, iron pyrites, alkalis, salts, coal, mica, shale or similar laminated materials, soft fragments, sea shells and organic impurities in such quantities as to affect adversely the hardening , the strength, the durability or the appearance" @@ -2907,15 +2936,19 @@ "standard_id": "IS 13753: 1993", "title": "Dust– Pressed Ceramic Tiles With Water", "category": "Floor, Wall, Roof Coverings and Finishes", - "summary": "Specifies sizes, dimensional tolerances, mechanical, physical and chemical requirements, surface quality requirements and marking of ceramic tiles. 1.1It is applicable only to dust-pressed ceramic glazed tiles first quality, with a water absorption (E>10%) according to Group B III of IS 13712 : 1993* for use as both wall and floor coverings. Tiles in this group are mainly used in areas not subject to severe mechanical load. They are not intended for applications where conditions of frost may app", + "summary": "Requirements for dust-pressed ceramic wall tiles with water absorption greater than 10% (high absorption). For interior wall tiling only.", "keywords": [ - "tiles", - "spacer", - "lugs", - "work", "ceramic", - "related", - "group" + "tile", + "dust-pressed", + "high", + "water", + "absorption", + "ten", + "10percent", + "wall", + "interior", + "greater" ], "key_sections": { "Scope": "Specifies sizes, dimensional tolerances, mechanical, physical and chemical requirements, surface quality requirements and marking of ceramic tiles. 1.1It is applicable only to dust-pressed ceramic glazed tiles first quality, with a water absorption (E>10%) according to Group B III of IS 13712 : 1993* for use as both wall and floor coverings. Tiles in this group are mainly used in areas not subject to severe mechanical load. They are not intended for applications where conditions of frost may apply. 1.2There is a small production of dust-pressed ceramic unglazed tiles with a water absorption greater than 10% that is not covered by this standard.", @@ -2928,15 +2961,17 @@ "standard_id": "IS 13754: 1993", "title": "Dust – Pressed Ceramic Tiles With", "category": "Floor, Wall, Roof Coverings and Finishes", - "summary": "Specifies the sizes, dimensional tolerances, mechanical, physical and chemical requirements, surface quality requirements and marking of ceramic tiles. It is applicable only to dust-pressed ceramic tiles of first quality, including tiles premounted on sheets, with a water absorption of 3%410 i) Length and width— The deviation in % of the average size of each tile (2 of 4 sides) from the work size ±1.2 ± 1.0 ±0.75 ±0.6 The deviation in % of the average size of each tile(2or4 sides) from the averge size ofthe 10 test specim", + "summary": "Requirements for dust-pressed ceramic tiles with water absorption less than 3% (low absorption). Suitable for exterior flooring. Vitrified/dense ceramic tiles category.", "keywords": [ - "tiles", - "work", + "ceramic", "tile", - "related", - "deviation", - "glazed", - "sides" + "dust-pressed", + "low", + "water", + "absorption", + "three", + "3percent", + "exterior", + "floor", + "vitrified", + "dense", + "impervious" ], "key_sections": {}, "content": "IS 13755: 1993 Dust– Pressed Ceramic Tiles\nWITH WATER ABSORPTION OF 3% < E ≤ 6%\n(GROUP – B II A)\n*Ceramictiles— definitions,classification, characteristics and marking TABLE 1 REQUIREMENTS Characteristics Surface S of the Product (cm2)\nA) Dimensions and Surface Quality S< 90 - 90410 i) Length and width— The deviation in % of the average size of each tile (2 of 4 sides) from the work size ±1.2 ± 1.0 ±0.75 ±0.6 The deviation in % of the average size of each tile(2or4 sides) from the averge size ofthe 10 test specimens (20 or 40 sides) ± 0.75 ±0.5 ± 0.5 ±05 ii) Thickness— The deviation in % of the average thickness of each tile from the work size thickness ± 10 ± 10 ± 5 ±5 iii) Straightness of sides1) (facial sides)— The maximum diviation from straightness in % related to the corresponding work size. ± 0.75 ±0.5 ± 0.5 ± 0.5 iv) Rectangularity1)— The maximum deviation from rectangularity in % related to the corresponding work size ±1.0 ±0.6 ± 0.6 ±0.6\n≤ Characteristics Surface S of the Product (cm2)\nTest According to\nIS 13630\nS ≤ 90\n90 < S ≤ 190\n190 < S ≤ 410\ns > 410\n(A) Dimensions and surface Quality i) Lenght and width\nPart 1 e\nThe deviation in % of the\n± 1.2\n± 1.0\n± 0.75\n± 0.6 average size of each tile (2\nor 4 sides) from the work size (W) f\nThe deviation in % of the\n±0.75\n±0.5\n±0.5\n±0.5 average size of each tile (2\nor 4 sides) from the average size of the 10 test specimens\n(20 or 40 sides)\nii) Thickness\nPart 1\nThe deviation in % of the\n±10\n±10\n±5\n±5 average thickness of each tile\nfrom the work size thickness iii) Straightness of sides1 (facial sides)\nPart 1\nThe maximum deviation from\n± 0.75\n± 0.5\n±0.5\n±0.5 straightness in % related to\nthe corresponding work sizes iv) Rectangularity1)\nPart 1\nThe maximum deviation from rectangularity in % related to\nthe corresponding work sizes v) Surface flatness\nPart 1\nThe maximum deviation from flatness in:\na) centre curvature, related to\n± 1.0\n± 0.5\n±0.5\n±0.5 diagonal calculated from\nthe work sizes b) Edge curvature, related to the\n±1.0\n±0.5\n±0.5\n±0.5 corresponding work size\nc) Warpage, related to diagonal\n± 1.0\n± 0.5\n± 0.5\n± 0.5 calculated from the work sizes\nvi) Surface quality2)\nMin 95% of tiles shall be free from visible defects that would Part 1 impair the appearance of a major area of tiles\nB Physical Properties i) Water absorption % by weight\nAverage 3