bids are invited for structuhral audit of bldgs 1a - conducting structural audit for rehabilitation for the building nos p35 uro approx total plinth area 33 sqm which includes following visual survey visual inspection for surface damages damage classification the visual inspection shall largely cover areas of high distress corrosion moisture leakage abnormal variations in structure algae and fungus growth efflorescence etc visual inspection would be documented in the form of worksheets photographic records and distress over drawings simple tools and instruments like camera with flash light magnifying glass binoculars chisel and hammer etc shall be used for measiring the distresses as per site requirement , structuhral audit of bldgs 1b - rebound hammer test nos of tests 4 for determining the estimated compressie strength of concrete and iniformity of concrete in terms of surface hardness as per is 13311 part 2 1992 astm c 805 02 bs 6089 and 1981 and bs 1881 part 202 bs en 13791 also establishing correlation chart between rebound hammer and other confirmatory test for having estimated in sity strength of concrete if required in absence of the confirmatory test strength data will be generated on the basis of empirical formula obtained from the callibration chart , structuhral audit of bldgs 1c - ultrasonic pulse velocity test nos of tests 2 for ascertaining the quality of concrete uniformity of concrete in terms of soundness and density of concrete as per is 13311 part 1 1992 astm c597 83 bs 6098 1981 and bs 1881 part 203 and bs en 13791 also establishing correlation chart between ultrasonic pulse velocity and other confirmatory test having estimated insitu strength of concrete if required. , structuhral audit of bldgs 1d - core extraction and testing extracting the concrete core samples following the codal provisions and evaluating the properties fck value grade of concrete in the laboratory from the core samples selected is 456 2000 is 516 and 1959 is 1199 and 2002