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118. ROPES (CLIMBING/ RAPPELLING)
QUALITATIVE REQUIREMENTS PICTURE OF
EQUIPMENT
SCOPE :- The specification covers to the requirement of
climbing rope nylon glacier region. The rope is intended
top be used as an aid in climbing difficult cliffs/slopes in
glacier region.
Related specification & availability : the following will
be related specifications
a) IS -678 Method for determination of colour fastness of
textile materials to washing test no 1
b) IS – 2454 Method for determination of colour fastness
of textile materials to artificial light.
c) IS- 6590 Braided nylon rope for mountain ring purpose.
d) IS – 397 – Kraft paper
e) IS – 1912 Country jute twine
f) IS – 3751 – Heavy cloth
g) IS – 2508- Low density polyethylene film
h) Indian standard specification are obtainable on payment
from the secretary (ADM) BIS Manak Bhawan 9 Bahadur
shah zafar marg N/DLI or from their regional office.
SEALED SAMPLE :- The climbing rope will confirm to
every respect to the terms of this specification in
workmanship finish and in all other respects not defined
in this specifications it will confirm to the sealed sample
held in custody of controlling authority.
MATERIAL : The rope will be made from continuous 140
TEX (1260 d) high tenacity nylon 6 or 66 multifilament
yarn and be given heat treatment. The required breaking
strength of the rope may be achieved by use of nylon yarn
having tenacity 63 g/tex (7g/d) count/denier of the yarn can
be varied suiting to the construction and finish of the rope.
MANUFACTURE ,WORKMANSHIP AND FINSIH:-
The rope will be manufacture with braided sheath and
twisted core. The core and the braiding will be well formed
and free from knots, subs or strains. All constituent yarn of
rope shall have proper tension during manufacture so as to
obtain uniform diameter with round cross section and
appropriate flexibility. Core will not be in braided
construction.
b) There will be 12 undyed core ends and 24 spindles in
sheath. Out of 24 spindles, 12 spindles will be fast bright
yellow colour, 11 spindles of fast bright scarlet colour and
one spindle of fast bright blue colour, Inter plating in sheath
will be maintained in order of 1 yellow spindle alternatively
. Like wise 23 spindles will be main tend and 24th spindle
will be blue colour to obtain the required pattern of braiding
. Rope will be smooth in fell and free from slackness of
sheath and core looping tendency.
c) The rope will be tendered in 49m of continuous length.
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A length of 4m from either end shall be cut and tested for
characteristics given in clause 6 and 7 below. After
examination of ropes which are strictly confirming to the
required particulars shall be heat sealed.
d) In appearance, general workmanship ,Finish and in any
other respects not defined in this specification, The rope
will match with the respective sealed sample held in the
custody of controlling authority.
a) Construction particular :-
Sheath- No of spindles-24
(Yellow-12),Scarlet-11Blue-1
Core-No pf core ends-12 count (denier)-
1260x2x10(twisted together)
No of stands in each core end -2 No of yarns in each stand -10 of core
Turns /dm-15 (Min)
b) The construction details of the rope will be varied to suit the manufacturing conditions provided
the finish and requirement as given in clause 7 are successfully met.