4. For each of the test results the Contractor shall identify the precision or repeatability of the particular sampling and testing method. This shall be as given from experience of the particular test by the laboratory or as expected from information in the particular test standard.
2. The parts or elements of the structure made from the defective batch or batches of concrete as represented by the works test cubes shall be identified by the Engineer and based on this information the Engineer shall instruct the Contractor on the required number and position of concrete cores.
Bs 1881 Part 124 Pdf 14
3. The Contractor shall take precautions to ensure that cooling water from concrete coring/other operations is discharged such as not to cause a mess or damage the interior or exterior parts of the structure.
8. If testing is being carried out on an occupied structure the Contractor shall co-ordinate with the owner or operator of the structure to arrange the detailed programme for the works and gain access to the various parts of the structure.
3. An assessment of in-situ compressive strength for a particular test region shall be based on at least 3 cores. Consideration shall be given to any structural implications resulting from taking cores. The diameter of concrete core shall be at least 100 mm for strength evaluation unless clear spacing of reinforcement is less than 100 mm and approved by Engineer.
1. The measurement of cover to reinforcing steel and other metallic items in concrete shall be carried out in accordance with BS 1881 Part 204 using an electromagnetic device that estimates the position depth and size of the reinforcement.
2. The locations for checking cover and the spacing between measurements shall be advised by the Engineer based on the objective of the investigation. The Contractor shall carry out calibrations of the electric magnetic device for a particular bar size to allow the bar diameter to be measured.
4. The electromagnetic device shall incorporate scale or digital display range and shall be calibrated in accordance with BS 1881 Part 204. When calibrated in this manner the indicated cover to steel reinforcement shall be accurate to within 5 % or 2 mm which ever is the greater over the working range given by the manufacturer.
1. The ultrasonic velocity test equipment shall be capable of measuring the transit time of a pulse vibration through concrete. The length of the pulse part between the transducer equipment shall be measured, and the pulse velocity calculated.
The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.
The statistics in this section are mainly from two sources. Series Al-349 are from censuses, or derived from censuses, published by Statistics Canada or its predecessors. Series A350-416 are from the official records of the Department of Employment and Immigration or its predecessors.
It should be noted that the references and the notes provided for each series are integral parts of the series themselves. More details about the differences in concepts and definitions which affect the comparability of the series can only be obtained from the original sources. The main purpose here is to present some selected series and their sources. It should also be mentioned that, because of space limitations in many cases, data are available in greater detail in the original sources.
Source: for 1851 to 1951, Statistics Canada (formerly Dominion Bureau of Statistics), Census of Canada, 1951, vol. X, table 1; for 1956, Census of Canada, 1956, vol. I, table 1; for 1961 Census of Canada, 1961, Vol. I, part 1, table 12, (Catalogue 92-536); for 1966, Census of Canada, 1966, vol. I, table 14, (Catalogue 92-608); for 1971, Census of Canada, 1971, vol. I, part 2, table 14, (Catalogue 92-716); for 1976, Census of Canada, 1976, vol. II, table 11, (Catalogue 92-824).
Source: for 1871 to 1941, Census of Canada, 1941, vol. II, table 5; for 1951, Census of Canada, 1951, vol. I, table 2; for 1956, Census of Canada, 1956, vol. I, table 2; for 1961, Census of Canada, 1961, vol. I, part 1, table 2, (Catalogue 92-540); for 1966, Census of Canada, 1966, vol. I, table 2, (Catalogue 92-601); for 1971, Census of Canada, 1971, special bulletin, table 1, (Catalogue 98-701; for 1976, Census of Canada, 1976, vol. VIII, table 1, (Catalogue 92-831).
Source: (basis 1941 rural and urban definition) for 1871 to 1956, Census of Canada, 1951, vol. I, table 13 and first edition of this volume, p. 14; for 1961, Census of Canada, 1961, vol. I, part 1, Introduction, (Catalogue 92-535); for 1966, Census of Canada, 1966, vol. I, Introduction, (Catalogue 92-607); for 1971, Census of Canada, 1971, (unpublished tabulation produced by Census Characteristics Division of Statistics Canada) (Basis 1976 rural and urban definition); for 1976, Census of Canada, 1976, vol. I, table 7, (Catalogue 92-807).
Source: for places 5,000 and over in 1871 and 1881, Census of Canada, 1921, vol. I, table 12; for 1891, Census of Canada, 1951, vol. X, table 4; for 1901 to 1956, Census of Canada, 1956, Bulletin 3-2, table 2, and Census of Canada, 1941, vol. I, table 7; for 1961, Census of Canada, 1961, vol. I, part 1, (Catalogue 92-535); for 1966, Census of Canada, 1966, vol. I, (Catalogue 92-607); for 1971 and 1976 Census of Canada, 1971, and Census of Canada, 1976, (unpublished tabulations by Census Characteristics Division of Statistics Canada).
Source: for figures based upon the 1941 definition, Census of Canada, 1951, vol. X, table 9; for 1951 definition, Census of Canada, 1951, vol. X, table 8; for 1956 definition, Census of Canada, 1956, Bulletin 3-2, table 11; for 1961 and 1966, Census of Canada, 1966, vol. I, table 13, (Catalogue 92-608); for 1971, Census of Canada, 1971, vol. I, part 2, table 18 (Catalogue 92-717) Census of Canada, 1976, vol. I, table 7, (Catalogue 92-807).
Source: for 1851 to 1871, Nathan Keyfitz, The Growth of Canadian Population, table 3, p. 50; for 1881 and 1891, Census of Canada, 1941, vol. I, table 12; for 1901 to 1951, Census of Canada, 1951, vol. I, table 19; for 1956, Census of Canada, 1956, Bulletin 1-9, table 16; for 1961, Census of Canada, 1961, vol. I, part 2, table 20, (Catalogue 92-542); for 1966, Census of Canada, 1966, vol. I, table 20, (Catalogue 92-610); for 1971, Census of Canada, 1971, vol. I, part 2, table 7, (Catalogue 92-715); for 1976, Census of Canada, 1976, vol. VIII, table 1, (Catalogue 92-835).
For a discussion of accuracy of reporting age in 1941 and in previous censuses, and for totals of 'age not stated' in each census from 1881 to 1941, see Census of Canada, 1941, vol. I, pp. 120-127.
Since 1961, the assignment for the unstated ages has been made by the computer. The computer was also programmed to check for internal consistency. The procedure used other relevant data on the person, Census of Canada, 1961, Administrative Report of the 1961 Census of Canada, vol. VII, part 2, pp. 101-102, (Catalogue 99-537).
Source: for 1921, Census of Canada, 1921, vol. II, table 7; for 1931, Census of Canada, 1931, vol. III, table 1; for 1941, Census of Canada, 1941, vol. II, table 21; for 1951, Census of Canada, 1951, vol. I, table 21; for 1956, Census of Canada, 1956, Bulletin 1-9, table 17; for 1961, Census of Canada, 1961, vol. I, part 2, table 21, (Catalogue 92-542); for 1966, Census of Canada, 1966, vol. I, table 20, (Catalogue 92-610); for 1971, Census of Canada, 1971, vol. I, part 2, table 8, (Catalogue 92-715); for 1976, Census of Canada, 1976, vol. II, table 12, (Catalogue 92-823).
Source: for 1871 to 1921, Canada Year Book, 1948-49, p. 154; for 1931 to 1951, Canada Year Book, 1957-58, p. 137; for 1961, Census of Canada, 1961, vol. I, part 2, table 34, (Catalogue 92-545); for 1971, Census of Canada, 1971, vol. I, part 3, table 1, (Catalogue 92-723).
Source: for 1871 to 1921, Canada Year Book, 1948-49, p. 155; for 1931 to 1951, Canada Year Book, 1957-58, p. 137; for 1961, Census of Canada, 1961, vol. I, part 2, table 41, (Catalogue 92-546); for 1971, Census of Canada, 1971, vol. I, part 3, table 9, (Catalogue 92-724).
Source: for 1931, Census of Canada, 1931, vol. I, table 28; for 1941 to 1961, Census of Canada, 1961, vol. I, part 2, table 63, (Catalogue 92-549); for 1971, Census of Canada, 1971, vol. I, part 3, table 17, (Catalogue 92-725); for 1976, Census of Canada, 1976, vol. II, table 1, (Catalogue 92-821).
Source: for 1941, Census of Canada, 1941, vol. I, tables 74 and 75; for 1961, Census of Canada, 1961, vol. IV, table H1, (Catalogue 98-508); for 1971, Census of Canada, 1971, vol. I, part 2, table 24, (Catalogue 92-718).
Source: for 1881 to 1921, Census of Canada, 1921, vol. III, tables 1 and 2; for 1931, Census of Canada, 1931, vol. V, tables 47 and 48; for 1941, Census of Canada, 1941, vol. V, table 4; for 1951, Census of Canada, 1951, vol. III, table 4; for 1956, Census of Canada, 1956, vol. I, table 34; for 1961 Census of Canada, 1961, vol. II, part 1, table 2, (Catalogue 93-510); for 1966, Census of Canada, 1966, vol. II, table 9, (Catalogue 93-603); for 1971, Census of Canada, 1971, vol. II, part 1, table 1, (Catalogue 93-702); for 1976, Census of Canada, 1976, vol. III, table 16, (Catalogue 93-805). 2ff7e9595c
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