Lull 644E-42 Operation Manual - Manual (Page 92)

90 Model 644E Origin 3/04
Operation
7. The platform must have a restraining means such as a guardrail or a
means of securing personnel such as a body belt or lanyard for each occu-
pant of the platform.
8. The guardrail or similar structure shall have a nominal height to the plat-
form floor of 42" (1066 mm) around the perimeter of the platform and
include a midrail. The guardrail openings may be used to provide alternate
access openings provided the opening can be easily made by hinging or
removing sections, but must be easily put back into original position when
alternate openings are no longer required.
9. The guardrail shall be capable of withstanding a concentrated horizontal
force of 200 lb (890 N) applied at the point of least resistance without per-
manent deformation.
10. A body belt and lanyard is to have an attaching point for freedom of move-
ment, and its length is to limit free fall to 5 feet (1500 mm) measured from
the point of attachment to the operator. The complete system shall be
capable of withstanding three consecutive drop tests to simulate a 250 lb
(113 kg) person falling 6 feet (1800 mm) without allowing the test weight to
fall free to the ground. A deceleration device may be included.
11. Lanyards, when provided, shall be arranged so as not to cause a tripping
hazard.
12. Body belts, when provided, should have a width of at least 1.75 in.
(44 mm).
13. Structural safety factor - all load supporting structural elements of the work
platform shall have a structural safety factor of not less than 2 to 1 based
on the minimum yield strength of materials used.
Capacity Limitations
The combined mass (weight in pounds) of the platform, load and personnel shall not
exceed one-third (33%) of the capacity of the related load center position indicated
on the capacity chart. Refer to ìUsing the Capacity Chartî on page 71.