| Perry's
Butt Hinges are manufactured and have been fully tested to conform to
BS7352:1990 (Preformance of Metal Hinges for Side Hanging Applications.)
in the classifications shown wherever possible. For advice or technical
information on any hinge not classified our Technical Department will
be pleased to assist and offer advice as applicable.
To find the class of hinge required first establish the total weight of the door and the maximum annual number of cycles the door will be required to open. Then look up the class needed to meet these requirements in the table below. |
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| Class |
Maximum
Weight of Door |
Maximum
Annual No. of cycles |
|
| Kgs |
lbs |
||
| 1 |
10 |
22 |
5,000 |
| 2 |
20 |
44 |
5,000 |
| 3 |
20 |
44 |
25,000 |
| 4 |
40 |
88 |
25,000 |
| 5 |
40 |
88 |
200,000 |
| 6 |
40 |
88 |
500,000 |
| 7 |
60 |
132 |
500,000 |
| 8 |
80 |
176 |
200,000 |
| 9 |
120 |
264 |
200,000 |
| Please
Note
The design weights are based on three hinges per door being fitted, if 2 hinges per door are fitted then the design weight should be reduced by one third. When "None-Back Check" Door Closers are fitted it is necessary to add 20% to the effective door weight when calculating the classifiaction of the hinge required and double to actual door weight when "Back Check" Door Closers are to be fitted. Should any doubts arise, we would be pleased to offer the services of our Technical Sales Department for guidance and any assistance necessary. When fitting any type of Butt or Backflap Hinge having 2, 3 or 5 knuckles, the leaf with the pin or the greater number of knuckles should always be fitted to the door frame and not the actual door. |
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