General Notes for civil Engineering

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General Notes for civil Engineering  

  •   Electrical conduits shall not run in column 
  •    Earth work excavation for basement above 3 m Should be
    stepped form 
  •    Any Back filling shall be compacted 95% of dry density at the
    optimum moisture content and in layers not more than 200mm
    for filling above structure and 300 mm for no structure 
  •    F SOLING IS SPECIFIED THE SOLING STONES SHALL BE LAID
    AT45° TO 60° INCLINATION (AND NOT VERTICAL) WITH
    INTERSTICES FILLED WITH SAND OR MOORUM. 
  •   Y REPRESENTS TOR STEEL GRADE - Fe-415 OF IS:1786. WITH
    CHARECTERISTIC YIELD STRENGTH OF 415 N/MM MINIMUM. 
  •   ∅  REPRESENTS MILD STEEL GRADE - 1 OF IS:432 (PART-1) 
  •    ALL REINFORCEMENT SHALL BE FREE FROM MILL SCALES,
    LOOSE RUST & COATS OF PAINTS, OIL OR ANY OTHER
    SUBSTANCES. 
  •    BY PROVIDING PROPER COVER BLOCKS, SPACERS, CHAIRS
    ETC.. ALL REINFORCEMENT SHALL BE PLACED AND
    MAINTAINED IN POSITION  AS SHOWN IN STRUCTURAL
    DRAWING 
  •    CEMENT SHALL BE 43 GRADE ORDINARY PORTLAND CEMENT
  • CONFORMING TO IS:8112 OR53 GRADE ORDINARY PORTLAND
  • CEMENT CONFORMING TO IS:12269-1987.

   CEMENT SHALL BE STORED IN DRY PLACES ON A RAISED
PLATFORM ABOUT 200mm ABOVE FLOOR LEVEL AND 300mm
AWAY FROM WALLS. BAGS TO BE STACKED NOT MORE THAN
10 BAGS HIGH IN SUCH A MANNER THAT IT IS ADEQUATELY
PROTECTED FROM MOISTURE   AND CONTAMINATION.

   WATER USED FOR BOTH MIXING AND CURING SHALL BE
CLEAN AND FREE FROM INJURIOUS AMOUNTS OF OILS, ACIDS,
ALKALIS, SALTS, SUGAR AND ORGANIC MATERIALS OR
OTHER SUBSTANCES THAT MAY BE DELETERIOUS TO
CONCRETE OR STEEL. THE pH SHALL BE
GENERALLYBETWEEN 6 AND 8.

 CEMENT SHALL BE TESTED FOR ITS SETTING. 

1.  THE INITIAL SETTING TIME SHALL NOT BE LESS THAN 30
MINUTES. 
 2.  THE FINAL SETTING TIME SHALL NOT BE MORE THAN 10
HOURS. 
   SAMPLES FROM FRESH CONCRETE SHALL BE TAKEN AND AT
LEAST A SET OF 6 CUBES OF 150mm SHALL BE PREPARED AND
CURED. 
3 CUBES EACH AT 7 DAYS AND 28 DAYS SHALL BE
TESTED FOR COMPRESSIVE STRENGTH. THE TEST RESULTS
SHOULD BE SUBMITTED TO ENGINEER FORAPPROVAL. IF
RESULTS ARE UNSATISFACTORY NECESSARY
ACTION/RECTIFICATION/REMEDIAL MEASURES HAS TO BE
EXERCISED. 
  •    A SET OF CUBE TESTS SHALL BE CARRIED OUT FOR EACH 30
    Cum OF CONCRETE / EACH LEVELS OF CASTING / EACH BATCH
    OF CEMENT. 
  •    WATER CEMENT RATIO FOR DIFFERENT GRADES OF
    CONCRETE SHALL NOT EXCEED 0.45 FOR M20 AND ABOVE
    AND 0.50 FOR M10 / M15 CONTRACTOR / MIX DESIGNER TO
    CARRY OUT THE NECESSARY INITIAL (PRELIMINARY) TESTS.
    FOR CONCRETE GRADES M20 AND ABOVE APPROVED
    ADMIXTURE SHALL BE USED AS PER MIX DESIGN
    REQUIREMENTS.
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