Tolerance in construction

                             

                          Tolerance in Construction

• Tolerance in construction for form work as per IS.

The form work shall be designed and construction so as to remain sufficiently regid during placing and compaction of compaction of concrete, for further detail regarding design, detailing etc reference may be made to IS 14687. The tolerances of the shapes, lines an dimension shown in the drawing shall be within the limits given below:

• Deviation from specified                      +12 mm

        dimension of cross section                    -6 mm
        of columns and beams 

           

• Deviation from dimensions

         of footings

1. Dimension in plan                                    +50 mm
2. Eccentricity                                                0.02 times the width in the direction

                                                                            of deviation but not more than 50 mm

    3. Thickness                                                    +_ 0.05 time specified thickness

The Tolerances apply to concrete dimension only, and only to positioning of vertical reinforcing steel or dowels.

• Tolerance for placing of reinforcement 

1.  for effective depth 200 mm or less                +-  10 mm
2.  for effective depth more than 200 mm          + - 15 mm