Sports and Organization Rules of the International Judo Federation ...
Sports and Organization Rules of the International Judo Federation ...
Sports and Organization Rules of the International Judo Federation ...
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<strong>Sports</strong> <strong>and</strong> <strong>Organization</strong> <strong>Rules</strong> <strong>of</strong> <strong>the</strong> <strong>International</strong> <strong>Judo</strong> <strong>Federation</strong><br />
4.6 Top friction characteristics<br />
(According to st<strong>and</strong>ard EN 12503-6)<br />
The coefficient <strong>of</strong> rotational friction shall be equal to or greater than 1.0.<br />
3T<br />
Mean coefficient <strong>of</strong> rotational friction =<br />
wD<br />
w is <strong>the</strong> vertical force applied on surface, in Newton.<br />
D is <strong>the</strong> diameter <strong>of</strong> disk in meter<br />
T is <strong>the</strong> mean torque in Newton-Meter.<br />
Results given in Report<br />
w 460<br />
D 0,15<br />
T<br />
Coefficient <strong>of</strong> friction in rotation 0,0<br />
Normative value<br />
≥1<br />
Comments<br />
4.7 Marking<br />
Requirements <strong>of</strong> marking are in table <strong>of</strong> test report.<br />
Results given in Report<br />
Sample conform<br />
Sample not conform<br />
The gymnastic mats shall be visibly <strong>and</strong> permanently marked with*:<br />
REQUIRED INFORMATIONS Present not present<br />
The number <strong>of</strong> <strong>the</strong> st<strong>and</strong>ard EN 12503-3 <strong>and</strong> <strong>the</strong> type number<br />
The name <strong>and</strong> trademark <strong>of</strong> <strong>the</strong> manufacturer, retailer or importer <strong>and</strong> <strong>the</strong> year <strong>of</strong> manufacture<br />
The indication on <strong>the</strong> upper face <strong>of</strong> <strong>the</strong> mat (if not recognizable)<br />
* The requirement <strong>of</strong> marking readability for <strong>the</strong> whole life <strong>of</strong> <strong>the</strong> mat cannot be checked by <strong>the</strong> laboratory<br />
5) Performances Requirements for <strong>the</strong> Label<br />
5.1 Determination <strong>of</strong> dimensional characteristics <strong>of</strong> tatamis<br />
Dimensional control<br />
REQUIREMENTS<br />
Dimensions: normative values<br />
Tatamis <strong>of</strong> 200cm x 100cm (+/- 0.5 cm)<br />
Tatamis <strong>of</strong> 100cm x 100cm (+/- 0.5 cm)<br />
3 thicknesses acceptable:<br />
--40,0 mm (+/- 1,2 mm) => +/- 3 %<br />
--50,0 mm (+/- 1,5 mm) => +/- 3 %<br />
--60,0 mm (+/- 1,8 mm) => +/- 3 %<br />
Any o<strong>the</strong>r size announced by <strong>the</strong> manufacturer must be made by an <strong>of</strong>ficial dem<strong>and</strong> to<br />
IFJ. The testing laboratory is able to participate in <strong>the</strong> decision <strong>of</strong> acceptability <strong>of</strong> this new<br />
size (measurement <strong>of</strong> performances <strong>and</strong> expert opinion) while maintaining its integrity <strong>and</strong><br />
independence. It will <strong>the</strong>n be possible to waive this requirement. If <strong>the</strong> applicant does not<br />
reply within a month, <strong>the</strong> new dimensions will be accepted by default.<br />
Results given in Report<br />
Length (mm)<br />
Width (mm)<br />
Thickness (mm)<br />
St<strong>and</strong>ard limits Value 1 Value 2 Value 3 Average<br />
Sample conform<br />
5.2 Determination <strong>of</strong> uniformity <strong>of</strong> tatamis<br />
Control <strong>of</strong> uniformity <strong>of</strong> shock absorption on mat.<br />
REQUIREMENTS<br />
Fall height : 40 cm.<br />
Indentor diameter (mm): 78 mm.<br />
Impacts:<br />
Sample not conform<br />
- 132 -<br />
- 133 -
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