SIST EN 17822:2023

Forestry machinery - Requirements for sling gear and deflection pulleys for forestal hauling operations

This document specifies basic test and condition requirements for deflection pulleys and sling gear which are attached to ropes and rope end connectors in forestal applications.
It is applicable to forestal hauling operations including rope-assisted felling.
This document is applicable to the following elements, sling gear and fastening elements:
-   deflection pulleys used in forestal hauling operation (see 3.22);
-   choker ropes;
-   choker chains;
-   radio-controlled chokers;
-   shackles;
-   round slings/tree protectors;
-   tree towing ropes;
-   rope slide hooks/rope sliders/choker hooks.
It is not applicable to the following sling gear:
-   the functional safety of radio-controlled chokers;
-   non-sheathed tree towing ropes made of synthetic fibres;
-   slings and deflection pulleys for the function and structure of mobile yarders as defined in EN 16517:2021 (e.g. for the installation of the haul-back line).

Forstmaschinen - Sicherheitsanforderungen für Anschlagmittel und Umlenkrollen für die Holzrückung

Dieses Dokument legt grundlegende Prüf- und Zustandsanforderungen für Umlenkrollen und Anschlagmittel fest, die an Seilen und Seilendbefestigungen in forstlichen Anwendungen angebracht werden.
Es ist anwendbar auf die forstliche Holzrückung einschließlich seilunterstützter Fällung.
Dieses Dokument ist anzuwenden für die folgenden Elemente, Anschlagmittel und Befestigungselemente:
   Umlenkrollen, die bei der forstlichen Holzrückung verwendet werden (siehe 3.22);
   Chokerseile;
   Chokerketten;
   Funkchoker;
   Schäkel;
   Rundschlingen/Baumschoner;
   Baumzugseile;
   Seilgleithaken/Seilgleiter/Chokerhaken.
Es ist nicht anzuwenden für die folgenden Anschlagmittel:
   die funktionale Sicherheit von Funkchokern,
   nicht ummantelte Baumzugseile aus Kunststoff,
   Schlingen und Umlenkrollen für die Funktion und den Aufbau mobiler Seilkrananlagen nach EN 16517:2021 (z. B. für die Installation des Rückholseils).

Machines forestières - Exigences relatives aux élingues et poulies de renvoi pour les opérations de transport forestier

Le présent document spécifie les exigences de base en matière d'essais et de conditions pour les poulies de renvoi et les équipements d'élingage qui sont fixés aux câbles et aux connecteurs d'extrémité des câbles dans les applications forestières.
Il s'applique aux opérations de halage forestier, y compris l'abattage assisté par câble.
Le présent document est applicable aux éléments, équipements d'élingage et éléments de fixation suivants :
   poulies de renvoi utilisées dans les opérations de halage forestier (voir 3.22) ;
   câbles d'étranglement ;
   chaînes d'étranglement ;
   colliers étrangleurs radiocommandés ;
   manilles ;
   élingues rondes/protège-arbres ;
   câbles de remorquage pour arbre ;
   crochets à glissière pour câble/glissières de câble/crochets d'étranglement.
Il n'est pas applicable aux équipements d'élingage suivants :
   la sécurité fonctionnelle des colliers étrangleurs radiocommandés ;
   les câbles de remorquage pour arbre non gainés en fibres synthétiques ;
   les élingues et poulies de renvoi destinées au fonctionnement et à la structure des téléphériques mobiles tels que définis dans l'EN 16517:2021 (par exemple, pour l'installation du câble de retour).

Gozdarski stroji - Zahteve za pritrdilne elemente in preusmerjevalne škripce za gozdarstvo

Ta dokument določa osnovne zahteve glede preskusov in pogojev za obračalne kolute in dvižno opremo, ki so pritrjene na vrvi in končne priključke za vrvi pri uporabi v gozdarstvu.
Uporablja se za gozdne vleke, vključno s sečnjo s pomočjo vrvi.
Ta dokument se uporablja za naslednje elemente, dvižno opremo in pritrdilne elemente:
–   obračalne kolute, ki se uporabljajo pri gozdnih vlekah (glej 3.22);
–   zadrževalne vrvi za vleko;
–   zadrževalne verige za vleko;
–   radijsko krmiljene zadrževalne vrvi;
–   okovi;
–   okrogle zanke/zaščita dreves;
–   vrvi za vleko dreves;
–   drsni kavlji za vrvi/drsniki za vrvi/zadrževalni kavlji.
Ne uporablja se za naslednjo dvižno opremo:
–   funkcionalno varnost radijsko vodenih zadrževalnih vrvi;
–   vrvi za vleko dreves brez ovoja iz sintetičnih vlaken;
–   zanke in obračalne kolute za delovanje in konstrukcijo mobilnih žičnic, kot so opredeljene v standardu EN 16517 (npr. za namestitev vlečne vrvi za poteg).

General Information

• Status: Published
• Public Enquiry End Date: 30-Apr-2022
• Publication Date: 28-Feb-2023
• ICS: 65.060.80 - Forestry equipment
• Technical Committee: IMKG - Machinery for agriculture and forestry
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Feb-2023
• Due Date: 29-Apr-2023
• Completion Date: 01-Mar-2023
• Ref Project: EN 17822:2023 - Forestry machinery - Requirements for sling gear and deflection pulleys for forestal hauling operations

Overview

EN 17822:2023 - Forestry machinery - Requirements for sling gear and deflection pulleys for forestal hauling operations (CEN) defines basic safety, test and condition requirements for sling gear and deflection pulleys used in forestal hauling operations, including rope-assisted felling. The standard covers components attached to hauling ropes (e.g., choker ropes, choker chains, shackles, rope slide hooks, round slings/tree protectors and tree towing ropes) and sets design, testing, marking and instruction requirements to ensure reliable performance in forestry environments.

Key topics and technical requirements

• Scope & applicability: Applies to sling gear and deflection pulleys used in forestal hauling operations; not applicable to functional safety of radio-controlled chokers, non-sheathed synthetic tree towing ropes, nor slings/pulleys specific to mobile yarders per EN 16517:2021.
• Design temperature range: Components shall be suitable for −20 °C to +60 °C.
• Operating coefficients: If not otherwise specified, sling gear shall have an operating coefficient ≥ 2 (ratio between breaking force and max permissible load). Loads are assessed against the tractive appliance’s forest tractive force (FTF).
• Deflection pulleys:
  • Pulley diameter (measured at rope centre) ≥ 10 × rope diameter.
  • Side clearance between pulley and housing ≤ 0.2 × maximum rope diameter to avoid rope crushing.
  • Deflection pulleys must be secured against unintentional opening and unhooking.
  • Load assumptions use total load (TL) - twice the maximum permissible rope force through the pulley.
• General safety:
  • No sharp edges or protrusions that may damage rope or cause injury.
  • Eyelets designed to prevent rope kinking.
  • Connections secured against self‑loosening under tension.
• Testing, marking and instructions: The standard specifies test methods for deflection pulleys and sling gear (see Clause 5), marking requirements (Clause 6) and user instructions (Clause 7). Annexes include discard criteria (A) and rope deflection/load factor guidance (C).

Applications and users

• Who uses EN 17822:2023:
  • Manufacturers and designers of forestry sling gear, deflection pulleys and related attachments.
  • Test laboratories and certification bodies performing compliance testing.
  • Forestry equipment specifiers, procurement teams and safety managers writing purchase specifications or risk assessments.
  • Maintenance personnel and operators who need guidance on marking, inspection and discard criteria.
• Practical benefits:
  • Ensures compatibility between hauling ropes and sling gear.
  • Reduces rope and equipment failures during skidding, yarding and rope-assisted felling.
  • Supports safer, standardized procurement and maintenance practices.

Related standards

• EN 14492-1 (winches/pulleys), EN 16517 (mobile yarders), ISO 19472 (forest winches), ISO 4309 (wire rope care/inspection), EN ISO 12100 (machine safety/risk reduction). These referenced standards provide complementary requirements for winches, rope care and overall machinery safety.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2023
Gozdarski stroji - Zahteve za pritrdilne elemente in preusmerjevalne škripce za
gozdarstvo
Forestry machinery - Requirements for sling gear and deflection pulleys for forestal
hauling operations
Forstmaschinen - Sicherheitsanforderungen für Anschlagmittel und Umlenkrollen für die
Holzrückung
Machines forestières - Exigences relatives aux élingues et poulies de renvoi pour les
opérations de transport forestier
Ta slovenski standard je istoveten z: EN 17822:2023
ICS:
65.060.80 Gozdarska oprema Forestry equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17822
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 65.060.80
English Version
Forestry machinery - Requirements for sling gear and
deflection pulleys for forestal hauling operations
Machines forestières - Exigences relatives aux élingues Forstmaschinen - Sicherheitsanforderungen für
et poulies de renvoi pour les opérations de transport Anschlagmittel und Umlenkrollen für die Holzrückung
forestier
This European Standard was approved by CEN on 2 January 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17822:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Safety requirements . 9
4.1 General . 9
4.2 Deflection pulleys. 9
4.3 Shackles . 10
4.4 Choker ropes made from steel ropes, choker hook and choker . 10
4.5 Rope slide eyelet, choker chain and sling hook . 10
4.6 Rope slide hooks . 10
4.7 Tree towing ropes made of synthetic fibres . 10
4.8 Slings . 10
4.9 Tree protectors . 11
5 Test requirements . 11
5.1 General . 11
5.2 Testing deflection pulleys . 11
6 Marking . 11
7 Instructions for use . 12
Annex A (normative) Discard criteria . 14
Annex B (informative) Figures illustrating forestry slings . 15
Annex C (informative) Rope deflection and associated load factor . 20
Bibliography . 21

European foreword
This document (EN 17822:2023) has been prepared by Technical Committee CEN/TC 144 “Tractors and
machinery for agriculture and forestry”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2023, and conflicting national standards shall be
withdrawn at the latest by August 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
When performing forestal hauling operations, tree trunks, stalks or logs, etc. need to be fastened to a
towing rope using sling gear (e.g. choker chains, choker ropes) in order to haul them out of the stand.
Such gear can be of various designs.
Test and condition requirements need to be defined in a standard for such sling gear so that when they
are fulfilled the sling gear can absorb the forces acting on it without breaking. Sling gear for forestal
hauling operations is subject to loads different from those acting on sling gear for lifting applications or
cranes. It is necessary to formulate requirements for sling gear for forestal hauling operations in order to
meet the needs of this situation.
1 Scope
This document specifies basic test and condition requirements for deflection pulleys and sling gear which
are attached to ropes and rope end connectors in forestal applications.
It is applicable to forestal hauling operations including rope-assisted felling.
This document is applicable to the following elements, sling gear and fastening elements:
— deflection pulleys used in forestal hauling operation (see 3.22);
— choker ropes;
— choker chains;
— radio-controlled chokers;
— shackles;
— round slings/tree protectors;
— tree towing ropes;
— rope slide hooks/rope sliders/choker hooks.
It is not applicable to the following sling gear:
— the functional safety of radio-controlled chokers;
— non-sheathed tree towing ropes made of synthetic fibres;
— slings and deflection pulleys for the function and structure of mobile yarders as defined in
EN 16517:2021 (e.g. for the installation of the haul-back line).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 13889:2003+A1:2008, Forged steel shackles for general lifting purposes — Dee shackles and bow
shackles — Grade 6 — Safety
EN 14492-1:2006+A1:2009 , Cranes — Power driven winches and hoists — Part 1: Power driven winches
EN 16517:2021, Agricultural and forestry machinery — Mobile yarders for timber logging — Safety
EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk
reduction (ISO 12100:2010)
ISO 19472:2006, Machinery for forestry — Winches — Dimensions, performance and safety

As impacted by EN 14492-1:2006+A1:2009/AC:2010.
ISO 4309, Cranes — Wire ropes — Care and maintenance, inspection and discard
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 19472:2006 and
EN 16517:2021 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.1
rope-assisted felling
felling operation where the tractive force of a logging winch is used to maintain the direction of felling
EXAMPLE In cases of safety felling or for felling in another direction as driven by gravity.
Note 1 to entry: This provides safety-relevant and ergonomic advantages.
3.2
choker rope
rope that is tied around the wood to be moved during hauling and held by a choker hook mounted on the
hauling rope
Note 1 to entry: Choker ropes can be manufactured from steel wire or of synthetic fibres.
3.3
choker chain
short chain piece, which has a sling hook at one end and can have an insertion pin at the other end and
which serves for moving wood in hauling operations while it is held by a rope slide eyelet mounted on a
hauling rope
Note 1 to entry: To move wood, the choker chain is joined to a rope slide eyelet running on the hauling rope and
tied around the wood to be moved during hauling.
Note 2 to entry: Choker chains have a length of approx. 2 m to 3 m.
3.4
tree towing rope
synthetic fibre or wire rope with loops at the ends, which is joined to the tree and to the rope of a logging
winch
Note 1 to entry: Tree towing ropes made of synthetic fibres having a sheathing are usually used when laced.
3.5
laced application of tree towing ropes
lark’s head
application in which the tree towing rope is placed around the tree forming a tightening noose usually
using a shackle
3.6
two-string application of tree towing ropes
application in which the tree towing rope is placed around the tree and in which both loops of the tree
towing rope are inserted in a shackle
3.7
shackle
sling gear, comprising two quick-release individual elements, a shackle body and a bolt, for connecting
the load directly to a hauling device or when using other sling gear
3.8
working load limit
WLL
maximum permissible load according to the manufacturer’s specifications
EXAMPLE Loading capacity, useful load or permissible traction force.
Note 1 to entry: This indicates the maximum force for which a component is designed and which is borne by this
without damage under defined application conditions.
3.9
forest tractive force
FTF
maximum tractive load applied to the rope of a tractive appliance during forestal hauling operations
according to the manufacturer’s specifications
EXAMPLE Permissible traction force of a logging winch.
Note 1 to entry: This indicates the maximum force for which a tractive appliance is designed, when performing
forestal hauling operations and which is borne by this without damage under these application conditions.
3.10
sling gear
means to attach a load to a hauling rope for forestal hauling operations
Note 1 to entry: The hauling rope is no sling gear.
3.11
rope slide hook
connecting element which runs freely on a hauling rope and which can be connected to a turn-back eye
or Flemish-eye
Note 1 to entry: This is according to EN 13411-3:2004+A1:2008 at the end of the rope
3.12
rope slide eyelet
rope pulley
connecting element, with an attachment point usually intended for choker chains, which runs freely on a
hauling rope
3.13
choker hook
connecting element running freely on a hauling rope with an attachment point suitable for attaching the
steel head of a choker rope
EN 17822:20
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