(1) In
highlead logging, chokers must be at least one size smaller than the
mainline.
(2) Straps must be
equivalently sized for the line they support, e.g., Extra Improved Plow Steel
(EIPS) line requires EIPS straps or equivalent strength material.
Figure 7-14 -- Straps -- Line Tension [Figure not included.
See ED. NOTE.]
(3) Straps
or chokers used at or near the ground to hang or support blocks, jacks, tree
shoes, or rigging must be sized in accordance with Table 7-7.
Table 7-7 -- Strap Sizes For Rigging At Or Near The Ground
[Table not included. See ED. NOTE.]
(4) Straps or chokers used to hang or support
blocks, jacks, tree shoes, or rigging in tail and intermediate trees must be
sized in accordance with Table 7-8.
Table 7-8 -- Strap Sizes For Rigging Hung In Tail and
Intermediate Support Trees [Table not included. See ED. NOTE.]
(5) When a two part strap or two
chokers are used to hang a block, jack, tree shoe, or rigging both eyes or ends
must be under approximately equal tension.
Figure 7-15 -- Straps -- Line Tension Bridal [Figure not
included. See ED. NOTE.]
(6) When two equal length chokers are used to
hang a block, jack, tree shoe, or rigging in lieu of one choker to gain extra
breaking strength, they must be:
(a) Arranged
as a swede-type connection.
(b)
Considered as a block hung in two eyes for Table 7-8.
(7) For straps hung in trees where the
interior angle or angles create excessive loading on the strap as shown in
Figure 7-14 additional precautions must be taken, such as using a larger strap,
lightening loads, moving the carriage ahead on the line, and so forth to reduce
the load on the strap.
(8) Straps
made of synthetic materials must be arranged so the straps cannot ride up or
down from their intended position.
(9) Straps made of synthetic materials must
be used and replaced in accordance with the manufacturer's
recommendations.
