®
VENCO VENTURO INDUSTRIES LLC
CINCINNATI, OHIO
C200
STABILITY TEST
HT55-20'-VLC SERIES
11-24-21C
DATE
SECTION
SUPERSEDES
TITLE
02-25-21B
STABILITY TEST - HT55-20'-VLC SERIES
20906-5520V
Overview
Venturo follows the guidelines of ANSI B30.5 in defining stability. Generally speaking, a truck is considered stable as long
as it is not on the verge of tipping - i.e. with the truck level, at least one tire on each corner of the truck must remain in
contact with the ground.
It is important to note that nearly every installation is unique and will, therefore, typically require stability testing.
The procedure outlined below follows ANSI's (B30.5 - 5-1.1.1) specified "maximum load rating" of 85% of truck stability.
Testing Procedure
1.
Locate the truck on firm, level ground and set parking brake.
2.
Fully deploy stabilizers, making sure they are firmly in contact with supportive ground; use stabilizer pads as
required. The tires of the truck should remain in full contact with the ground.
3.
Inspect wire rope and other key components of crane (consult owners manual for more information).
4.
Conduct an operational check of all crane functions.
5.
Use a
Test Weight
weighing a
minimum
of
2941 lbs
, (includes load block weight of 51 lbs.) to a
maximum of
3100 lbs
.
6.
Place the VLC system into
Stability Mode
(ref. VLC Manual, INST-30000, page 30005)
7.
Position the boom level and fully retracted
8.
Referring to the Stability Chart (drawing 20907) rotate the crane to a position between 1 and 2 o'clock (truck cab is
facing 12 o'clock) to begin testing.
9.
Use the winch to lift the Test Weight; DO NOT allow the weight to be more than 6" off the ground at any time during
testing (for safety).
9.1.
Using the test weight weighing between
2941 to 3100 lbs.
, extend the boom slowly, until one of the three
conditions occur:
9.1.1.
Full extension is reached - Mark the ZONE in question
100%
9.1.2.
The VLC system stops the boom extension - Mark the ZONE in question
100%
9.1.3.
The truck becomes unstable i.e. a tire lifts off the ground
9.1.3.1.
Retract the boom until at least one tire on each corner of the truck is making contact with the ground
9.1.3.2.
Use the formula below to determine the allowable
% of Rated Capacity
for the ZONE in question:
10.
Note: The "
Max Stable Reach in inches"
is measured from the
center of rotatio
n
of the crane housing to the
lifting load hook.
"Max Stable Reach" in inches"
% Rated Capacity =
X 100
246
11.
Record the
% of Rated Capacity
in the appropriate blank (region) on the Crane Stability page (ref. 20907) and
decal.
12.
Repeat Steps 7 through 12 for each ZONE on the stability page.
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