Stanley MC521 Pro Installation And Operation Manual page 25

2.3 To ensure that a sliding door operates in accordance with UL 325 entrapment protection criteria the following must be established:

Manual opening force (sliding doors without breakout) or breakout force with power on or off must be less then 50 lbf (222.4 N).

Closing force must be less than 30 lbf (133.4 N).

A closing sliding door must not develop kinetic energy in excess of 7 ft-lbf (9.49 J). This is achieved by proper setting of the closing speed. See section
entitled "Closing Speed".

Maximum recommended door weight:
Dura-Glide 5000 Series = 150 lbs (70 kg) per panel.
Dura-Glide/Dura-Guard/Dura-Storm and similar 2000/3000 Series = 220 lbs (100 kg) per panel.
IS10000/Double Diamond and similar Industrial Series = 300 lbs (90 kg) per panel
2.4 Closing Speed
Closing speed is measured over a travel distance of 2 or 3 feet. On smaller bi-part doors there may only be 2 feet of movement before the door system enters close-
check (latch check). The time measurement should start once the door has achieved closing speed, usually 6 inches from full open. Mark this point on the floor with
tape or other object. Measure from this point 2 or 3 feet toward the closed position and mark the next point. Use a stopwatch to measure the time it takes for the
sliding panel to travel this distance during normal closing cycles. Make sure the door system is not braking or entering close-check during the measurement. Repeat
the measurement 3 times and use the average value. The allowed time for a sliding panel to cover this distance during the closing cycle is given in the table below.
Door Weight
(pounds)
160 or less
161 to 180
181 to 200
201 to 220
221 to 240
241 to 260
261 to 280
281 to 300
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Rev. A, 11/23/10
Page 24 of 27
© 2010, THE STANLEY WORKS. ALL RIGHTS RESERVED.
ANSI/BHMA and UL Compliance Requirements for Sliding Doors
Closing speed (seconds) Closing time (seconds)
2 foot measurement
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
Attachment 4
(Sheet 2 of 2)
3 foot measurement
3.0
3.2
3.3
3.5
3.7
3.8
4.0
4.1