01.
General Requirements.
(3-31-22)
a. Guylines shall be of plow steel
or equivalent, and in good condition. (3-31-22)
b. Guylines shall be provided in sufficient
number, condition and location to develop stability and strength equivalent to
the breaking strength of any component part of the rigging or equipment.
(3-31-22)
c. Guylines shall be
fastened by means of shackles or hooks and slides. The use of loops or molles
for attaching guylines is prohibited. The use of wedge buttons on guylines is
prohibited. (3-31-22)
d. The "U"
part of a shackle shall be around the guyline and the pin passed through the
eye of the guyline. Pins shall be secured with molles, cotter-keys, or the
equivalent. (3-31-22)
e. Guylines
shall be kept tightened while equipment or rigging they support is in use.
(3-31-22)
02.
Anchoring Guylines. (3-31-22)
a.
Stumps used for fastening guylines and skylines shall be carefully chosen as to
position, height and strength. They shall be tied back if necessary. See
Figures 352.02.a. and 352.02.b.
FIGURE 352.02.a.
Click
here to view image
FIGURE 352.02.b.
Click
here to view image
(3-31-22)
b. Properly installed deadman anchors are
permitted. Guylines shall not be directly attached to deadman anchors. Suitable
straps or equally effective means shall be used. (3-31-22)
c. Stumps, trees and guyline anchors shall be
inspected from time to time while an operation is in progress and hazardous
conditions immediately corrected. (3-31-22)
d. Standing trees which will reach landing or
work areas shall not be used for guyline anchors. (3-31-22)
e. Any guyline anchor tree that can reach the
landing or work area shall be felled before using as an anchor.
(3-31-22)
03.
Effectiveness of Guys. (3-31-22)
a. Guys making an angle with the horizontal
greater than sixty (60) degrees will be considered less than fifty percent
(50%) effective. For the effectiveness of other angles see Table 352.03.a.
|
TABLE
352.03.a.
|
|
Degree
|
Effectiveness
|
|
60 to 45
|
50% to 75%
|
|
45 to 30
|
75% to 85%
|
|
30 to 10
|
85% to 95%
|
(3-31-22)
b. For the effectiveness of guys according to
the number of guys and their spacing, see Table 352.03.b.
|
TABLE
352.03.b.
|
|
No. of Guys
Equally
|
Guys Most Effective When Pull
Is:
|
Guys Will Support Strain Equal
To The Following:
|
|
3
|
Opposite 1 guy
|
100% of strength of 1 guy
|
|
4
|
Halfway between 2 guys
|
140% of strength of 1 guy
|
|
5
|
Opposite 1 guy or halfWay between 2
guys
|
160% of strength of 1 guy
|
|
6
|
Opposite 1 guy or halfway between 2
guys
|
200% of strength of 1 guy
|
|
7
|
Opposite 1 guy or halfway between 2
guys
|
225% of strength of 1 guy
|
|
8
|
Halfway between 2 guys
|
260% of strength of 1 guy
|
|
9
|
Opposite 1 guy or halfway between 2
guys
|
290% of strength of 1 guy
|
|
10
|
Opposite 1 guy or halfway between 2
guys
|
325% of strength of 1 guy
|
(3-31-22)
04.
Minimum Guyline
Requirements. A minimum of four (4) top guys are required on any
portable spar tree used for yarding, swinging, loading or cold-decking.
(3-31-22)
