Vestil LM-Boom - Manual (Page 14)

LM-series fork-mountable booms 01/11 rev. 11/14/2013
Page 14 of 28
Copyright 2013 Vestil Manufacturing Corp.
The center of gravity has a vertical component as well as a horizontal component. The vertical center of
gravity (VCG) is located 38 inches (~97 cm) from the bottom edges of the fork pockets. The horizontal center of
gravity (HCG) ranges from 3 inches up to 8 inches from the front edge of the vertical support. As depicted in the
diagram above:
 Retracted horizontal center of gravity (RHCG): boom fully retracted, with a load attached at position A,
the horizontal center of gravity is located 8 inches (~20cm) from the front edge of the vertical support;
 Extended horizontal center of gravity (EHCG): boom fully extended, with a load attached at position I,
the center of gravity is located 3 inches (~7.6cm) from the front edge of the vertical support.
 All other combinations of boom extension and load position yield horizontal centers of gravity located 3
inches to 8 inches from the front edge of the vertical support. (See “Range of possible horizontal
centers of gravity” in diagram above).
FIG. 3B: LM-HRT- 4k & 6k Centers of Gravity and Maximum Load Ratings for
Varying Load Attachment Point and Boom Extension Combinations
EHCG
VCG
Model EHCG RHCG VCG
LM-HRT-4k 13 1 /
16
in. (~33 cm) 9 15 /
16
in. (~25 cm) 31 3 /
8
in. (~80 cm)
LM-HRT-6k 13 1 /
16
in. (~33 cm) 9 15 /
16
in. (~25 cm) 31 3 /
8
in. (~80 cm)
= Center of gravity
Origin point
for centers of
gravity