IEC 61236:2010

IEC 61236 ®
Edition 2.0 2010-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Live working – Saddles, stick clamps and their accessories

Travaux sous tension – Selles, manchons et leurs accessoires

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IEC 61236 ®
Edition 2.0 2010-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Live working – Saddles, stick clamps and their accessories

Travaux sous tension – Selles, manchons et leurs accessoires

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 13.260; 29.240.20; 29.260.99 ISBN 978-2-88912-240-0
– 2 – 61236 © IEC:2010
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms, definitions and symbols .7
3.1 Terms and definitions .7
3.2 Symbols .8
4 Requirements .8
4.1 General .8
4.2 Dimensional requirements .8
4.3 Mechanical requirements.8
4.4 Protection against corrosion .9
4.5 Marking .9
4.6 Instructions for use.10
5 Tests .10
5.1 General .10
5.2 Visual and functional inspection .10
5.3 Dimensional check .11
5.4 Durability of marking .11
5.5 Mechanical tests .11
5.5.1 General test provisions and pass criteria .11
5.5.2 Specific test provisions.11
6 Conformity assessment .37
7 Modifications .37
Annex A (normative) Suitable for live working; double triangle (IEC 60417-5216:2002-10).38
Annex B (normative) General type test procedure .39
Annex C (normative) Classification of defects and associated requirements and tests .45
Bibliography.49

Figure 1 – Locking device with chain or strap – tensile test.12
Figure 2 – Locking device with chain or strap – bending test.12
Figure 3 – Chain (strap) binder – tensile test .13
Figure 4 – Locking device – bending test .14
Figure 5 – Test on the retractable spring.15
Figure 6 – Chain (strap) binder – torque test.16
Figure 7 – Ring saddle with rigid bracket – bending test .17
Figure 8 – Ring saddle with chain bracket – tensile test .18
Figure 9 – Lift-type saddle – bending test .19
Figure 10 – Shackle – tensile test .20
Figure 11 – Pole-type saddle – bending test .21
Figure 12 – Saddle extension – bending test.22
Figure 13 – Tower-type saddle – bending test.23
Figure 14 – Crossarm-type saddle – bending test .24

61236 © IEC:2010 – 3 –
Figure 15 – Crossarm-type saddle – torque test.25
Figure 16 – Block saddle – bending test .26
Figure 17 – Tower-arm yoke – bending test .27
Figure 18 – Platform pivot attachment – bending test on inner flange of steel angle.28
Figure 19 – Platform pivot attachment – bending test on outer flange of steel angle .28
Figure 20 – Example of tensile test on a hydraulic tension puller on double-string set.29
Figure 21 – Example of bending test on a saddle for triangular yoke.30
Figure 22 – Example of bending test on a saddle for rectangular yoke .30
Figure 23 – Example of tensile test on a tenon extension.31
Figure 24 – Example of bending test on a insulating rope gin.31
Figure 25 – Example of tensile test on the block anchoring point of insulating rope.32
Figure 26 – Slippage test on a stick clamp.32
Figure 27 – Bending test on a stick clamp.33
Figure 28 – Tensile test on the assembling screw for coupled stick clamps.34
Figure 29 – Slippage test of a support-stick strirrup .35
Figure 30 – Bending test of a support-stick strirrup (rigid stirrup) .35
Figure 31 – Tensile test of a support-stick strirrup (swivel stirrup).36
Figure 32 – Bending test of a offset eye.36

Table 1 – Mechanical ratings for each type of device .9
Table B.1 – Sequence number of the type tests to be carried out.40
Table B.2 – Sequence number of the type tests to be carried out.41
Table B.3 – Sequence number of the type tests to be carried out.42
Table B.4 – Sequence number of the type tests to be carried out.43
Table B.5 – Example of a type test sequence for tower-type saddle.44
Table C.1 – Classification of defects and associated requirements and tests for
saddles, stick clamps and their accessories.45

– 4 – 61236 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIVE WORKING –
SADDLES, STICK CLAMPS AND THEIR ACCESSORIES

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61236 has been prepared by IEC technical committee 78: Live
working.
This second edition cancels and replaces the first edition published in 1993. It constitutes a
technical revision.
It includes the following significant technical changes from the previous edition:
– clarification of the requirements and of the test provisions;
– addition of a test for the durability of marking;
– application of conformity assessment for products having completed the production phase,
according to IEC 61318:2007 (Ed. 3).

61236 © IEC:2010 – 5 –
The text of this standard is based on the following documents:
Enquiry draft Report on voting
78/850/CDV 78/867/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – 61236 © IEC:2010
INTRODUCTION
The requirements provided in this standard are essential requirements. Each user of this
standard may supplement it with their own requirements. These will cover, for example,
required mechanical performance and conditions of interchangeability with equipment
already in service. In such cases, caution should be taken to maintain or improve the
performance of the products.
This International Standard has been prepared in accordance with the requirements of
IEC 61477.
The products covered by this standard may have an impact on the environment during some
or all stages of its life cycle. These impacts can range from slight to significant, be of short-
term or long-term, and occur at the global, regional or local level.
Except for a disposal statement in the instructions for use, this standard does not include
requirements and test provisions for the manufacturers of the product, or recommendations to
the users of the product for environmental improvement. However, all parties involved in the
product’s design, manufacture, packaging, distribution, use, maintenance, repair, reuse,
recovery and disposal are encouraged to take account of environmental considerations.

61236 © IEC:2010 – 7 –
LIVE WORKING –
SADDLES, STICK CLAMPS AND THEIR ACCESSORIES

1 Scope
This International Standard is applicable to saddles, stick clamps and their accessories, used
for live working.
The products designed and manufactured according to this standard contribute to the safety
of the users provided they are used by skilled persons, in accordance with safe methods of
work and the instructions for use.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60417, Graphical symbols for use on equipment
IEC 61318:2007, Live working – Conformity assessment applicable to tools, devices and
equipment
IEC 61477, Live working – Minimum requirements for the utilization of tools, devices and
equipment
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61318 and the
following apply.
3.1.1
accessory
supplemental metal device used with saddles and stick clamps to carry out the live work
3.1.2
family of devices
devices which have the same function (utilization, use, etc.)
3.1.3
rated value
value of a quantity used for specification purposes, established for a specified set of operating
conditions of a component, device, equipment, or system
[IEC 60050-151:2001, 151-16-08]
3.1.4
saddle
metal device fixed to a pole, cross-arm or tower and used with a stick clamp to hold or guide
support sticks and other equipment

– 8 – 61236 © IEC:2010
[IEC 60743:2008, 10.3.1 and IEC 60050-651:1999, 651-09-06, modified]
3.1.5
stick clamp
metal device used with a stick or saddle to hold or guide a support stick
[IEC 60743:2008, 10.3.6, modified]
3.1.6
type of device
devices which have the same design and application and are of similar dimensions
3.2 Symbols
T rated torque given by the manufacturer for a device or a part of a device and for
N
testing purposes
F rated tensile force given by the manufacturer for a device or a part of a device and
TN
for testing purposes
F rated bending force given by the manufacturer for a device or a part of a device
BN
and for testing purposes
F rated slippage force given by the manufacturer for a device and for testing
GN
purposes
4 Requirements
4.1 General
The following requirements have been prepared in order that the saddles, stick clamps and
their accessories covered by this standard are designed and manufactured to contribute to
the safety of the users, provided they are used by persons skilled for live working, in
accordance with safe methods of work and the instructions for use.
NOTE Appropriate measures should be taken to minimize the weight and size of the equipment to optimize
handling.
4.2 Dimensional requirements
For each type of device, the manufacturer shall indicate the dimensions or operating ranges
related to the specific functions of the device, in particular the dimensions of acceptable
supports for the saddles, and the specified diameters of acceptable tubes and rods for stick
clamps shall be indicated.
4.3 Mechanical requirements
For each type of device, the manufacturer shall give the rated values as outlined in Table 1.

61236 © IEC:2010 – 9 –
Table 1 – Mechanical ratings for each type of device
Rated values
Type of device
Bending Tensile Torque Slippage
F F T F
BN TN N GN
Chain (strap) binder - Whole device Tightening device
- Locking device
Ring saddle with - Whole device Chain (strap) and
rigid bracket - Locking device locking device
Ring saddle with Locking device - Whole device Tightening device
chain bracket - Chain (strap) and
locking device
Lift-type saddle - Whole device - Chain (strap) and
- Locking device  locking device
- Shackle
a
Pole-type saddle - Whole device Chain (strap) and
- Locking device locking device
Saddle extension Whole device
a
Tower-type saddle Whole device  Mounting bolts
a
Crossarm-type Whole device  Mounting bolts
saddle
Block saddle Whole device
Tower-arm yoke Whole device Mounting bolts
Platform pivot Whole device
attachment
Saddles and - Saddle for - Assembly
accessories for  triangular yoke
hydraulic tension - Saddle for - Tenon extension
puller  rectangular yoke
- Insulating rope gin - Block anchoring
point
b
Stick clamp Whole device Assembly Mounting bolts Whole device
Rigid support-stick Whole device  Whole device
stirrup
Swivel support-stick Whole device Whole device
stirrup
Offset eye Whole device
a
The manufacturer shall give the values F for these devices with and without saddle extension.
BN
b
Applicable to stick clamps designed to be coupled.
4.4 Protection against corrosion
Metallic parts shall be protected against corrosion, either by their composition or by a suitable
surface treatment.
For each type of device, the manufacturer shall demonstrate that the metallic parts are
corrosion resistant.
4.5 Marking
Each device shall be marked with the following permanent items of marking:
– manufacturer’s name or trade mark;
– type reference;
– year and, if possible, month of manufacture;
– rating (or capacity if requested by the customer);

– 10 – 61236 © IEC:2010
– symbol IEC 60417-5216:2002-10 – Suitable for live working; double triangle (Annex A);
NOTE The exact ratio of the height of the figure to the base of the triangle is 1,43. For the purpose of
convenience, this ratio can be between the values of 1,4 and 1,5.
– number of the relevant IEC standard immediately adjacent to the symbol (IEC 61236).
Information or characteristics not required at the work site, such as year of publication of the
standard, shall be provided by other means (bar codes, microchips, etc.) or shall be provided
on the packaging.
4.6 Instructions for use
Each device shall come with the manufacturer’s instructions for use and care. These
instructions shall be prepared in accordance with the general provisions given in IEC 61477.
These instructions shall include at least
– maximum mechanical rating;
– recommended application(s);
– recommendations for cleaning, storage, transportation, periodic testing, refinishing and
disposal.
5 Tests
5.1 General
This standard provides testing provisions to demonstrate compliance of the product with the
requirements of Clause 4. These testing provisions are primarily intended to be used as type
tests for validation of the design input. Where relevant, alternative means (calculation,
examination, tests, etc.), are specified within the test subclauses for the purpose of saddles,
stick clamps and their accessories having completed the production phase.
To show compliance with this standard, the manufacturer shall prove that the type tests have
been carried out successfully on at least three devices for each type.
However, when the differences between several types of device are limited in number, tests
that are unaffected by the differing characteristics of the devices can be carried out on a
single type of device, and the results can be used for the other device types.
The different type tests, and the order in which these tests are performed are given in
Annex B.
The tests in Tables B.1, B.2, B.3 and B.4 of Annex B shall be performed, following the
specified order.
NOTE In Tables B.1, B.2, B.3 and B.4 the numbers within parentheses provide reference to the Subclause where
the relevant test is explained. For some families of devices, columns are divided in sub-columns equal to the
number of mechanical tests to be applied to these devices (these may be destructive). These sub-columns also
show the sequence of tests to be applied (for an example see Table B.5).
Any device failing to pass any one of the tests mentioned in Tables B.1, B.2, B.3 and B.4 of
Annex B shall result in the design being rejected.
5.2 Visual and functional inspection
Each device shall be visually inspected to detect manufacturing defaults and to check proper
functioning.
61236 © IEC:2010 – 11 –
The test shall be considered as passed if each device shows compliance with the
requirements included in 4.3, 4.4, 4.5 and 4.6 where applicable.
5.3 Dimensional check
Each device shall be measured to ensure that its dimensions match the manufacturer’s rated
dimensions.
5.4 Durability of marking
The durability of the marking shall be verified by thoroughly cleaning the marking for at least
1 min with a piece of lint-free cloth dampened with water and then rubbing it vigorously for a
further minimum of 1 min with a piece of lint-free cloth dampened with isopropanol (CH -
CH(OH)-CH ).
NOTE 1 It is the employer’s duty to ensure that any relevant legislation and any specific safety instructions
regarding the use of isopropanol are fully observed.
The test shall be considered as passed if the marking remains legible and the letters do not
smear.
The surface of the device may change. No signs of loosening shall be present for labels.
NOTE 2 Marking made by moulding or engraving need not be subjected to this test.
5.5 Mechanical tests
5.5.1 General test provisions and pass criteria
The tensile, bending, and slippage force and the torque values shall be progressively applied
in increments at a rate of (0,1 ± 0,025) F /s, F /s, F /s and T /s until the values of
TN BN GN N
, 1,25 F , 1,25 F and 1,25 T are reached.
1,25 F
TN BN GN N
Each value shall then be maintained for 1 min before the results are noted.
The test shall be considered as passed if no visible signs of damage are observed on the
device and no slippage occurs.
These force and torque values shall then be increased again at the same rate as above until
the values of 2,5 F , 2,5 F , 1,5 F and 2,5 T are reached. Each value shall be
TN BN GN N
maintained for 1 min before the results are noted again.
The test shall be considered as passed if no permanent deformation or breakage is observed
on the device and no slippage occurs.
5.5.2 Specific test provisions
5.5.2.1 Locking device with chain or strap
5.5.2.1.1 Tensile test
The locking device with chain or strap shall be attached to a fixed support (see Figure 1).
Refer to 5.5.1 for the tensile test provisions and pass criteria.

– 12 – 61236 © IEC:2010
IEC  2445/10
Key
1 locking device
2 fixed support
Figure 1 – Locking device with chain or strap – tensile test
5.5.2.1.2 Bending test
The locking device with chain or strap shall be fixed on a support at an angle of 45° to the
direction of the force F (see Figure 2). A load equal to 0,9 F shall be progressively applied
TN
in increments at a rate of (0,1 ± 0,025) F /s and shall then be maintained for 1 min before
TN
the results are noted.
The test shall be considered as passed if no visible signs of damage is observed on the
device.
IEC  2446/10
Key
1 fixing-pin point
R radius of curvature = 5 mm
Figure 2 – Locking device with chain or strap – bending test
5.5.2.2 Chain (strap) binder
5.5.2.2.1 Tensile test
The binder shall be in a full tightened position. The end of the chain (strap) shall be locked in
the locking device to obtain a loop (see Figure 3). The tensile force shall be applied by means
of two 30 mm diameter rods. It shall be applied progressively in increments at a rate of (0,1 ±
0,025) F /s until it reaches 1,25 F and shall then be maintained for 1 min before the
TN TN
results are noted.
61236 © IEC:2010 – 13 –
The test shall be considered as passed if no visible signs of damage are observed on the
device.
The force shall then be increased again until it reaches 2,5 F .
TN
The test shall be considered as passed if no permanent deformation or breakage is observed
on the device.
NOTE The 1,25 and 2,5 coefficients are applicable to each leg of the loop. Therefore, the total force applied is
doubled (2,5 F and 5 F ).
TN TN
IEC  2447/10
Key
1 30 mm diameter rod
Figure 3 – Chain (strap) binder – tensile test
5.5.2.2.2 Bending test on the locking device
The previous test shall be resumed after having fixed the locking device on a support (a rod
with a flat part) at an angle of 45° to the direction of the force F (see Figure 4).
A force F equal to 0,9 F is applied. The force shall be increased progressively in increments
TN
at a rate of (0,1 ± 0,025) F /s until it reaches 2,5 F and shall then be maintained for 1 min
TN
before the results are noted.
The test shall be considered as passed if no visible signs of damage is observed on the
device.
The force shall then be repeated until it reaches 5 F.
The test shall be considered as passed if no permanent deformation or breakage is observed
on the device.
– 14 – 61236 © IEC:2010
IEC  2448/10
Key
1 30 mm diameter rod
Figure 4 – Locking device – bending test
5.5.2.2.3 Test on the retractable spring of the hand wheel type binder
The hand wheel shall be fully retracted and the body of the tightening device shall be
maintained in a vertical position (see Figure 5).
A vertical tensile force F shall be applied on the tightening device rod.
The test shall be considered as passed if the value of the force to achieve full compression of
the spring is greater than 120 N, but less than 180 N.

61236 © IEC:2010 – 15 –
IEC  2449/10
Key
1 rod
2 hand-wheel in retracted position
3 body of the tightening device
4 support
Figure 5 – Test on the retractable spring
5.5.2.2.4 Torque test
The chain (strap) binder shall be set on a 160 mm diameter metallic cylinder (see Figure 6).
The chain (strap) binder shall be maintained in position by the retractable spring of the
tightening device. Refer to 5.5.1 for the torque test provisions and pass criteria.

– 16 – 61236 © IEC:2010
IEC  2450/10
Key
1 cylinder 160 mm diameter
Figure 6 – Chain (strap) binder – torque test
5.5.2.3 Ring saddle with rigid bracket
5.5.2.3.1 Bending test on the whole saddle
The saddle shall be set on a metal support or the support agreed to by the manufacturer and
the customer (wood, concrete, fibreglass or metal) with a chain (strap) binder. Where
applicable, the hand wheel shall then be tightened with a torque of (30 ± 3) N⋅m (see
Figure 7).
Refer to 5.5.1 for the bending test provisions and pass criteria.

61236 © IEC:2010 – 17 –
IEC  2451/10
Key
1 chain binder of the whole saddle
2 force applied on the extreme part of the rigid bracket
Figure 7 – Ring saddle with rigid bracket – bending test
5.5.2.3.2 Tensile test on the chain (strap) and locking device
(See 5.5.2.2.1)
5.5.2.3.3 Bending test on the locking device
(See 5.5.2.2.2)
5.5.2.4 Ring saddle with chain bracket
5.5.2.4.1 Tensile test on the whole saddle
The saddle shall be set on a metal support or the support agreed to by the manufacturer and
the customer (wood, concrete, fibreglass or metal) with a chain (strap) binder. Where
applicable, the hand wheel shall then be tightened to a torque of (30 ± 3) N⋅m (see Figure 8).
The tensile force F shall be applied on one of the rings. Refer to 5.5.1 for the tensile test
provisions and pass criteria.
– 18 – 61236 © IEC:2010
IEC  2452/10
Key
1 tightened hand-wheel (30 ± 3) N·m
Figure 8 – Ring saddle with chain bracket – tensile test
5.5.2.4.2 Additional tests for ring saddles with chain bracket
– Tensile test on the locking device (see 5.5.2.2.1)
– Bending test on the locking device (see 5.5.2.2.2)
– Test on the retractable spring (see 5.5.2.2.3)
– Torque test (see 5.5.2.2.4)
5.5.2.5 Lift-type saddle
5.5.2.5.1 Bending test on the whole saddle
The saddle shall be set on a metal support or the support agreed to by the manufacturer and
the customer (wood, concrete, fibreglass or metal) with a chain (strap) binder. Where
applicable, the hand wheel shall then be tightened with a torque of (30 ± 3) N⋅m. The
extremity of the handle shall be supported horizontally by the handle prop resting against a
hard wood block between the handle prop and the support (see Figure 9).
Refer to 5.5.1 for the bending test provisions and pass criteria.

61236 © IEC:2010 – 19 –
IEC  2453/10
Key
1 axis of the shackle 4 horizontal axis
2 handle 5 hard wood block
3 fastening device 6 handle prop
Figure 9 – Lift-type saddle – bending test
5.5.2.5.2 Tensile test on the shackle (butt ring)
The shackle, with pin, shall be placed on a tensile test bench (see Figure 10). The pin of the
shackle shall be fixed by a tenon of the same width as that of the handle.
Refer to 5.5.1 for the tensile test provisions and pass criteria.

– 20 – 61236 © IEC:2010
IEC  2454/10
Key
1 tenon support
2 axle of the shackle
Figure 10 – Shackle – tensile test
5.5.2.5.3 Additional tests for lift-type saddles
– Tensile test on the chain (strap) and locking device (see 5.5.2.2.1)
– Bending test on the locking device (see 5.5.2.1.2)
5.5.2.6 Pole-type saddle
5.5.2.6.1 Bending test on the whole saddle
The saddle shall be set on a metal support or the support agreed to by the manufacturer and
the customer (wood, concrete, fibreglass or metal) with a chain (strap) binder. Where
applicable, the hand wheel shall then be tightened to a torque of (30 ± 3) N⋅m (see Figure 11).
Refer to 5.5.1 for the bending test provisions and pass criteria.

61236 © IEC:2010 – 21 –
IEC  2455/10
Key
1 chain binder
2 tightening device
Figure 11 – Pole-type saddle – bending test
5.5.2.6.2 Additional tests for pole-type saddles
– Tensile test on the chain (strap) and locking device (see 5.5.2.2.1)
– Bending test on the locking device (see 5.5.2.1.2)
5.5.2.7 Saddle extension – bending test
The saddle extension shall be mounted on the corresponding saddle or a support having the
same shape (see Figure 12). The holding-down bolt of the extension shall be tightened to a
torque of (15 ± 1,5) N⋅m.
Refer to 5.5.1 for the bending test provisions and pass criteria.

– 22 – 61236 © IEC:2010
IEC  2456/10
Key
1 saddle extension 3 horizontal support
2 axle 11 mm diameter 4 holding-down bolt
Figure 12 – Saddle extension – bending test
5.5.2.8 Tower-type saddle
5.5.2.8.1 Bending test
The tower-type saddle shall be mounted on a steel angle (or an assembly of two steel angles)
having the capability to support the maximum rated capacity. The wing-nuts (thumb-nuts)
shall be tightened to a torque of (20 ± 2) N⋅m.
The bending force F shall then be applied parallel to the axis of the steel angle(s) (see
Figure 13).
Refer to 5.5.1 for the bending test provisions and pass criteria.

61236 © IEC:2010 – 23 –
IEC  2457/10
Figure 13a – Example 1
IEC  2458/10
Figure 13b – Example 2
Key
1 wing-nut
2 mounting screw
3 shackle
4 steel angles
5 axis
Figure 13 – Tower-type saddle – bending test
5.5.2.8.2 Torque test
The saddle shall be mounted on the same assembly as for the previous test.

– 24 – 61236 © IEC:2010
The tightening torque shall be applied to the wing-nuts (thumb-nuts). Refer to 5.5.1 for the
torque test provisions and pass criteria.
5.5.2.9 Crossarm-type saddle
5.5.2.9.1 Bending test
The saddle shall be mounted on a crossarm of minimum width and maximum thickness. The
mounting bolts shall be set to their maximum spacing and the wing-nuts (thumb-nuts)
tightened to a torque of (20 ± 2) N⋅m.
The force F shall be applied on the swivel (see Figure 14). Refer to 5.5.1 for the bending test
provisions and pass criteria.
In addition, no slippage shall occur on the crossarm.

IEC  2459/10
Key
1 maximum rated thickness
Figure 14 – Crossarm-type saddle – bending test
5.5.2.9.2 Torque test
The saddle shall be mounted on the same crossarm as for the bending test and the mounting
bolts shall be set to their maximum spacing (see Figure 15).
The tightening torque shall be applied to the wing-nuts. Refer to 5.5.1 for the torque test
provisions and pass criteria.
61236 © IEC:2010 – 25 –
IEC  2460/10
Key
1 maximum rated thickness
2 minimum rated width
Figure 15 – Crossarm-type saddle – torque test
5.5.2.10 Block saddle
5.5.2.10.1 Bending test
The block saddle shall be mounted on the largest steel angle for which it is designed. The
wing-nuts (thumb-nuts) shall be tightened to a torque of (20 ± 2) N⋅m. A rope shall be
attached to the cleat.
The force F shall be applied with the rope at an angle of 15° to the steel angle (see
Figure 16). Refer to 5.5.1 for the bending test provisions and pass criteria.
In addition, no slippage shall occur on the steel angle.

– 26 – 61236 © IEC:2010
IEC  2461/10
Key
1 rope
2 cleat
3 steel angle
Figure 16 – Block saddle – bending test
5.5.2.10.2 Torque test
Same test as for the tower-type saddle given in 5.5.2.8.2.
5.5.2.11 Tower-arm yoke – bending test
The tower-arm yoke shall be supported by a pulling yoke. The pulling yoke width shall be
such that the pulling yoke fits between legs 1 and 2 at their minimum extension (see
Figure 17). The distance between the jack screws shall be set at maximum. The clevis end of
each jack screw is fixed to a support.
The force F shall be applied to the pulling yoke. Refer to 5.5.1 for the bending test provisions
and pass criteria.
NOTE The tensile force on each jack screw is equal to F/2.

61236 © IEC:2010 – 27 –
IEC  2462/10
Key
1 pulling yoke 6 maximum extension
2 jack screw 7 shackle
3 leg 1 8 support
4 leg 2 9 hook
5 minimum extension
Figure 17 – Tower-arm yoke – bending test
5.5.2.12 Platform pivot attachment – bending test
5.5.2.12.1 On inner flange of steel angle
The platform pivot attachment, equipped with a tower-type saddle to fit the inner flange of
steel angle, shall be set on the largest size of steel angle for which it is designed. The wing-
nuts (thumb-nuts) shall be tightened to a torque of (25 ± 2,5) N⋅m.
The bending force F shall be applied progressively in increments at a rate of (0,1 ± 0,025)
F /s, in the axis of the pivot bearing, until it reaches 1,25 F (see Figure 18) and shall then
BN BN
be maintained for 1 min and the results noted.
The test shall be considered as passed if no visible signs of damage is observed on the
device.
– 28 – 61236 © IEC:2010
IEC  2463/10
Key
1 axis of the pivot bearing
2 steel angle
Figure 18 – Platform pivot attachment – bending test on inner flange of steel angle
5.5.2.12.2 On outer flange of steel angle
The platform pivot attachment equipped with a tower-type saddle to fit the outer flange of
steel angle, shall be set on the largest size of steel angle for which it is designed. The wing-
nuts (thumb-nuts) shall be tightened to a torque of (25 ± 2,5) N⋅m.
A force F shall be applied in the axis of the pivot bearing (see Figure 19). Refer to 5.5.1 for
the bending test provisions and pass criteria.

IEC  2464/10
Key
1 axis of the pivot bearing
2 steel angle
Figure 19 – Platform pivot attachment – bending test on outer flange of steel angle

61236 © IEC:2010 – 29 –
5.5.2.13 Saddles and accessories for hydraulic tension puller
5.5.2.13.1 General
There are many different types of devices for hydraulic tension pullers. These are based on
the differing characteristics of the network components and the types of insulator strings and
yokes (single- or double-suspension string, double-, triple- or quadruple-tension string).
This subclause outlines the test principles for a limited number of these devices.
5.5.2.13.2 Tensile test on the whole device
The assembly of the saddles and accessories for the hydraulic tensile puller shall be
supported on a test bench with the conductor end yoke fixed to a common support (see
Figure 20). Force F shall be applied to the other end of the assembly. Refer to 5.5.1 for the
tensile test provisions and pass criteria.

IEC  2465/10
Key
1 saddle for rectangular yoke (see Figure 22) 6 insulating clevis and tongue sticks
2 saddle for triangular yoke (see Figure 21) 7 tenon extension
3 jacking screw 8 anchoring point for insulating rope
4 hydraulic j
...