NEN EN 13373 : 2003

Foreword
1 Scope
2 Normative references
3 Measurement of the dimensions of rough blocks
   3.1 General
   3.2 Measurement of the gross dimensions of rough blocks
        3.2.1 General
        3.2.2 Apparatus
        3.2.3 Procedure of measurement
   3.3 Measurement of net dimensions of rough blocks
        3.3.1 General
        3.3.2 Apparatus
        3.3.3 Procedure of measurement
4 Measurement of the dimensions of rough slabs
   4.1 General
   4.2 Measurement of the gross dimensions of rough slabs
        4.2.1 General
        4.2.2 Apparatus
        4.2.3 Procedure of measurement
   4.3 Measurement of the net dimensions of rough slabs
        4.3.1 General
        4.3.2 Apparatus
        4.3.3 Procedure of measurement
        4.3.4 Measurement of the thickness of a rough slab
        4.3.5 Verification of the flatness of a rough slab
5 Measurement of the dimensions and verification of other
   geometric characteristics of finished products
   5.1 General
   5.2 Measurement of the dimensions of finished products
        5.2.1 General
        5.2.2 Apparatus
        5.2.3 Procedure of measurement
   5.3 Measurement of the thickness for a textured finish
        5.3.1 Measurement of surface irregularities
               5.3.1.1 General
               5.3.1.2 Apparatus
               5.3.1.3 Procedure of measurement
        5.3.2 Measurement of resulting thickness
   5.4 Verification of flatness
        5.4.1 Verification of flatness for a regular surface
               finish
               5.4.1.1 General
               5.4.1.2 Apparatus
               5.4.1.3 Procedure of measurement
        5.4.2 Verification of flatness for an irregular finish
   5.5 Verification of the squareness of faces
        5.5.1 General
        5.5.2 Angular measurement
               5.5.2.1 Apparatus
               5.5.2.2 Procedure of measurement
        5.5.3 Measurement in percentage
               5.5.3.1 Apparatus
               5.5.3.2 Procedure of measurement
   5.6 Verification of the squareness of edges
        5.6.1 General
        5.6.2 Apparatus
        5.6.3 Procedure of measurement
               5.6.3.1 Measurement using a set square
               5.6.3.2 Measurement using a reference surface
                        and a set-square
               5.6.3.3 Expression of the results
   5.7 Verification of the geometrical characteristics
        of fixing holes of slabs for claddings
        5.7.1 General
        5.7.2 Depth of the hole
               5.7.2.1 Apparatus
               5.7.2.2 Procedure of measurement
        5.7.3 Position of the hole
               5.7.3.1 Apparatus
               5.7.3.2 Procedure of measurement
        5.7.4 Diameter of the hole
               5.7.4.1 Apparatus
               5.7.4.2 Procedure of measurement
        5.7.5 Inclination of the hole
               5.7.5.1 Apparatus
               5.7.5.2 Procedure of measurement
   5.8 Verification of the shape of non-rectangular and
        curved units
        5.8.1 General
        5.8.2 Apparatus
        5.8.3 Procedure of measurement
6 Test report

Specifies methods for verifying the geometric characteristics of products of natural stone such as blocks, rough slabs, finished products for cladding, flooring, stairs and modular tiles.