Vestil CC-30-MC - Manual (Page 40)

39 Help Line: 800-363-2488 October 15
th
, 2001
INSTALLATION (continued)
WIND & RESTRAINT ISSUES
Because a chute installation may remain in place for days, weeks, or months, the installers must
consider how the chute will be affected by winds. Installers should also expect that strong winds
could arrive at times when there are no supervisors or workers on the job (ie: overnight or on the
weekend).
The way in which the chute will react to winds depends on how it was restrained, and the spacing
interval between restraints.
The installer can use either taut restraints or slack restraints based on the spacing between
restraints. The following two pages explain this concept further.
But first, take a look at the sketch below. It shows the potential effect of using the wrong type of
restraint. Why is the hoist pulled over? Note the hoist tie-backs, and their help in this instance.
Taut restraints
W
• The hoist is about to fail because
the chute installers did not
restrain the chute properly.
• The chute is acting like a sail
under tension.
• The proper way to restrain a
chute is shown on the next 2
pages.
Hoister
WRONG
60 ft.
(18 m)