SIST EN 1263-1:2015
(Main)Temporary works equipment - Safety nets - Part 1: Safety requirements, test methods
Temporary works equipment - Safety nets - Part 1: Safety requirements, test methods
This European Standard applies to safety nets and their accessories for use in construction and assembly work to protect from deeper fall. It specifies safety requirements and test methods and is based on the performance characteristics of polypropene and polyamide fibres. Materials used in nets should have no significant reduction in mechanical properties between –10 °C and +40 °C.
This European Standard is not applicable to the installation of safety nets. For a European Standard covering the installation of safety nets see EN 1263-2.
Temporäre Konstruktionen für Bauwerke - Schutznetze (Sicherheitsnetze) - Teil 1: Sicherheitstechnische Anforderungen, Prüfverfahren
Diese Europäische Norm gilt für Schutznetze und Schutznetzzubehör, die bei Bau- und Montagearbeiten Verwendung zum Schutz gegen tieferen Absturz finden. Sie legt sicherheitstechnische Anforderungen und Prüfverfahren fest und basiert auf den Verhaltenseigenschaften von Polypropylen- und Polyamidfasern. Die für Schutznetze verwendeten Materialien dürfen keine wesentlichen Verminderungen der mechanischen Eigenschaften zwischen 10 °C und 40 °C aufweisen.
Diese Europäische Norm legt nicht die Errichtung von Schutznetzen fest. Für die Errichtung von Schutznetzen siehe EN 1263-2.
Équipements temporaires de chantiers - Filets de sécurité - Partie 1 : Exigences de sécurité, méthodes d'essai
Začasne konstrukcije za gradnjo - Varovalne mreže - 1. del: Varnostne zahteve, preskusne metode
Ta evropski standard velja za varovalne mreže in njihove priključke, ki se uporabljajo pri gradnji in montaži kot zaščita pred padcem z večje višine. Določa varnostne zahteve in preskusne metode ter temelji na kakovostnih lastnostih polipropenskih in poliamidnih vlaken. Mehanske lastnosti materialov, uporabljenih v mrežah, naj se ne bi bistveno zmanjšale pri temperaturah od –10 °C in +40 °C.
Ta evropski standard se ne uporablja za nameščanje varovalnih mrež. Za evropski standard, ki zajema nameščanje varovalnih mrež, glej EN 1263-2.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Temporäre Konstruktionen für Bauwerke - Schutznetze (Sicherheitsnetze) - Teil 1: Sicherheitstechnische Anforderungen, PrüfverfahrenÉquipements temporaires de chantiers - Filets de sécurité - Partie 1 : Exigences de sécurité, méthodes d'essaiTemporary works equipment - Safety nets - Part 1: Safety requirements, test methods91.220Gradbena opremaConstruction equipment13.340.60Protection against falling and slippingICS:Ta slovenski standard je istoveten z:EN 1263-1:2014SIST EN 1263-1:2015en,fr,de01-marec-2015SIST EN 1263-1:2015SLOVENSKI
STANDARDSIST EN 1263-1:20021DGRPHãþD
SIST EN 1263-1:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1263-1
December 2014 ICS 13.340.60 Supersedes EN 1263-1:2002English Version
Temporary works equipment - Safety nets - Part 1: Safety requirements, test methods
Équipements temporaires de chantiers - Filets de sécurité -Partie 1 : Exigences de sécurité, méthodes d'essai
Temporäre Konstruktionen für Bauwerke - Schutznetze (Sicherheitsnetze) - Teil 1: Sicherheitstechnische Anforderungen, Prüfverfahren This European Standard was approved by CEN on 8 November 2014.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1263-1:2014 ESIST EN 1263-1:2015
EN 1263-1:2014 (E) 2 Contents Page Foreword .4 Introduction .5 1 Scope .6 2 Normative references .6 3 Symbols and terms and definitions .6 3.1 Symbols .6 3.2 Terms and definitions .8 4 Classification .9 4.1 Nets .9 4.2 Safety nets .9 4.3 Ropes . 12 5 Designation . 14 5.1 Safety net . 14 5.2 Rope . 14 6 Requirements . 14 6.1 Construction . 14 6.2 Tensile strength of ropes . 16 6.3 Energy absorption capacity of the test mesh . 16 6.4 Static strength of a net sample . 16 6.5 Dynamic strength of safety net System S (net with border rope) . 17 6.6 Dynamic strength of safety net System T (net attached on brackets for horizontal use). 17 6.7 Dynamic strength of safety net System U (net attached to supporting construction for vertical use) . 17 6.8 Dynamic strength of safety net System V (net with border rope attached to a gallow type support) . 17 7 Test methods . 17 7.1 General . 17 7.2 Dimensional inspection of the mesh size . 18 7.3 Test method for mesh rope . 19 7.4 Test for the static strength of nets . 21 7.5 Test for the breaking load of border-, tie- and coupling ropes . 23 7.6 Test for the energy absorption capacity of the net mesh . 23 7.7 Natural ageing test. 23 7.8 Artificial ageing test . 26 7.9 Testing the dynamic strength of safety nets System S (net with border ropes) . 31 7.10 Testing the dynamic strength of safety nets System T (nets attached on brackets for horizontal use . 32 7.11 Testing the dynamic strength of safety nets System U (net attached to supporting framework for vertical use . 35 7.12 Testing the dynamic strength of safety nets System V (net with border rope attached to a gallow type support) . 36 7.13 Test report . 37 8 Marking and labelling . 38 9 Handling instructions . 38 10 Conformity . 38 SIST EN 1263-1:2015
EN 1263-1:2014 (E) 3 Annex A (informative)
Prototype assessment . 39 Annex B (informative)
On-going production inspection . 40 B.1 On-going production inspection . 40 B.2 Annual inspection of test mesh . 41 Bibliography . 42
SIST EN 1263-1:2015
EN 1263-1:2014 (E) 4 Foreword This document (EN 1263-1:2014) has been prepared by Technical Committee CEN/TC 53 “Temporary works equipment”, the secretariat of which is held by DIN. 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 June 2015 and conflicting national standards shall be withdrawn at the latest by June 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1263-1:2002. This European Standard is one of a series of standards as listed below: — EN 1263-1, Temporary works equipment — Safety nets — Part 1: Safety requirements, test methods — EN 1263-2, Temporary works equipment — Safety nets — Part 2: Safety requirements for the erection of safety nets The significant changes incorporated in this revision are: a) replacement of Figure 4; b) addition of a new rope denominated “W” in Table 2; c) deletion of designation for nets; d) change of designation for ropes; e) complete revision of Clause 7 (test methods), incorporation of the description of a new vertical test rig and new figures for the mash samples; f) revision of dimensional inspection of the mesh size; g) replacement of Figure 9 and Figure 10 with new figures in 7.7.4.2 (interpretation of the results). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1263-1:2015
EN 1263-1:2014 (E) 5 Introduction Safety nets for use in construction and other assembly work, e.g. as devices to catch falling persons during the construction of halls and bridges, in open line construction as side protection, as anti-fall devices or devices to catch falling persons on working scaffolds, as side protection for safety scaffolds at roofs and in tunnelling can be chosen as a technically suitable and economic solution to catch persons falling from a height. They serve to protect from deeper falls even when large areas in plan occur. In contrast to being secured by personal protective equipment against falls from heights the mobility of persons working above the area protected by safety nets is not impaired during all work activity. Moreover, the use of safety nets has the advantage to catch persons falling from a height more softly than lanyards caused by large plastic deformations of the net. Attention should be paid to the fact that the ageing sensitivity of safety nets due to exposure to UV requires that they are exposed to open air condition a limited time only and then be withdrawn from service. For the evaluation of the ageing behaviour tests have been carried out over a period between 6 months and 24 months which apply to the most commonly used materials polyamide and polypropylene. The specifications of the limit values of breaking energy are based on these tests and on drop tests with articulated dummies and test spheres. After having been subjected to respective loading by persons falling from height the safety nets should be replaced, if appropriate. SIST EN 1263-1:2015
EN 1263-1:2014 (E) 6 1 Scope This European Standard applies to safety nets and their accessories for use in construction and assembly work to protect from deeper fall. It specifies safety requirements and test methods and is based on the performance characteristics of polypropene and polyamide fibres. Materials used in nets should have no significant reduction in mechanical properties between –10 °C and +40 °C. This European Standard is not applicable to the installation of safety nets. For a European Standard covering the installation of safety nets, see EN 1263-2. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1263-2:2014, Temporary works equipment — Safety nets — Part 2: Safety requirements for the erection of safety nets EN ISO 1806, Fishing nets — Determination of mesh breaking force of netting (ISO 1806) EN ISO 2307, Fibre ropes — Determination of certain physical and mechanical properties (ISO 2307) EN ISO 4892-1, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance (ISO 4892-1) EN ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Verification and calibration of the force-measuring system (ISO 7500-1) ISO 554, Standard atmospheres for conditioning and/or testing — Specifications 3 Symbols and terms and definitions 3.1 Symbols The mainly used symbols are given in Table 1. SIST EN 1263-1:2015
EN 1263-1:2014 (E) 7 Table 1 — Main symbols Number Symbol Denomination Unit 1 1 general safety factor for production and handling of the material; 1 = 1,5 — 2 2 specific coefficient for the deterioration due to ageing, see 7.7 or 7.8, 2 never less than 1 and shows at least 12 months service life — 3 lM mesh size mm 4 EA action value of energy for a net of class A (characteristic value) kJ 5 EB action value of energy for a net of class B (characteristic value) kJ 6 E0 value of breaking energy under reference conditions obtained from the recorded data of a net sample in the as new state kJ 7 E12 calculated value of breaking energy under reference conditions of a net sample after 12 months of ageing kJ 8 E6 calculated value of breaking energy as of a net sample after six month of ageing kJ 9 Evi from recorded test data calculated value of energy capacity of the mesh sample i subjected to ageing adjacent to the maximum tensile force Fvi J 10 Eoj from recorded test data calculated value of energy capacity of the mesh sample j in the as new state adjacent to the maximum tensile force Fvj J 11 Avi definite integral in the interval 0 ≤ ûv ≤ ûvvi obtained from the recorded data of the breaking test with the mesh sample i subjected to ageing, see Figure 12 cm2 12 Aoj definite integral in the interval 0 ≤ ûv ≤ ûv0j, obtained from the recorded data of the breaking test with the mesh sample j in the as new state, see Figure 13 cm2 13 Fvi recorded maximum tensile force of the mesh sample i subjected to ageing N 14 Foj recorded maximum tensile force of the mesh sample j in the as new state N 15 ûvvi extension at maximum tensile force Fvi of the mesh sample i (i
= 1,…,10) subjected to ageing m 16 ûvoj extension at maximum tensile force Foj of the mesh sample j (j
= 1,…,10) in the as new state m NOTE “as new state” means: of the same properties as a new one. SIST EN 1263-1:2015
EN 1263-1:2014 (E) 8 3.2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.2.1 mesh series of ropes arranged in a basic geometric pattern (either in squares or diamonds) with four knots or connecting points, forming a net 3.2.2 net connection of meshes 3.2.3 safety net net supported by a border rope, other supporting elements or a combination of these designed to catch persons falling from a height 3.2.4 mesh size distance between two knots or connections of mesh rope measured from the centre to the centre of these connections 3.2.5 mesh rope rope from which the meshes of a net are manufactured 3.2.6 border rope rope which passes through each mesh at the perimeter of a net and determines the perimetric dimensions of the safety net 3.2.7 tie rope rope used for securing the border rope to a suitable support 3.2.8 coupling rope rope that joins two or more safety nets together 3.2.9 test mesh section of mesh which is attached into the safety net and which can be removed to determine any deterioration due to ageing without impairing the performance of the net Note 1 to entry: The test mesh should consist of at least three meshes. 3.2.10 supporting framework structure to which nets are attached and which contributes to the absorption of kinetic energy in case of dynamic actions 3.2.11 class classification for the net respective to energy absorption capacity and mesh size SIST EN 1263-1:2015
EN 1263-1:2014 (E) 9 3.2.12 system assembly of safety net components, which forms an equipment to be used in accordance with the instruction manual 4 Classification 4.1 Nets This standard specifies four classes of net with maximum mesh sizes (lM, see Figure 6) and nominated values of energy which may act on the net (EA and EB) as follows: — Class A 1: EA = 2,3 kJ; lM = 60 mm — Class A 2: EA = 2,3 kJ; lM = 100 mm — Class B 1: EB = 4,4 kJ; lM = 60 mm — Class B 2: EB = 4,4 kJ; lM = 100 mm NOTE The above values EA and EB represent the characteristic values of energy and do not include the general safety factor , and not the specific coefficient 2 for the deterioration due to ageing. These coefficients are described in 6.3. 4.2 Safety nets Four systems of safety net shall be identified: 1) System S: Safety net with border rope (for example, see Figure 1), the smallest size shall be at least 35 m2. For rectangular safety nets the length of the shortest side shall be at least 5,0 m; Small safety nets (less than 35 m2 and 5,0 m on the shortest side) are not part of this standard and should be determined by national regulations where applicable. 2) System T: Safety net attached on brackets for horizontal use (for example, see Figure 2); 3) System U: Safety net attached to supporting framework for vertical use (for example, see Figure 3); 4) System V: Safety net with border rope attached to a gallow type support (for example, see Figure 4). SIST EN 1263-1:2015
EN 1263-1:2014 (E) 10
a) square mesh (Q) b) diamond mesh (D) Figure 1 — Safety net System S (net with border rope)
Figure 2 — Safety net System T (net attached on brackets for horizontal use) SIST EN 1263-1:2015
EN 1263-1:2014 (E) 11
Figure 3 — Safety net system U attached to supporting framework for vertical use
Figure 4 — Safety net System V (net with border rope attached to a gallow type support) SIST EN 1263-1:2015
EN 1263-1:2014 (E) 12 4.3
Ropes The properties and requirements of ropes that may be used in conjunction with safety nets are given in Table 2. To evaluate those properties, see EN ISO 2307. Table 2 — Types of ropes, properties and requirements Rope Minimum tensile strength (kN) System Note(s) Figure 5 Denomination without ends with a loop without a loop 7,5 10 15 20 30 F
x
xa
V Tie rope b G
x
xa
V Tie rope c H
x
xb
V Tie rope b J
x
xb
V Tie rope c K x
x S Border rope a L
x
xa S Tie rope b M
x
xa S Tie rope c N
x
x
S,T,U,V Coupling rope d O
x x
S,T,U,V Coupling rope e P x
x
V Border rope a R
x
xb
S Tie rope b W x
x
T Border rope a Z
x
xb
S Tie rope c a If the net is attached by single ropes. b If the net is attached with double ropes. SIST EN 1263-1:2015
EN 1263-1:2014 (E) 13
a) Rope K / Rope P / Rope W (border rope)
b) Rope L and F (tie rope, single use with only one load bearing diameter)
Rope R and H (tie rope, doubled use with two load bearing diameters)
c) Rope M and G (tie rope, single use with only one load bearing diameter)
Rope Z and J (tie rope, doubled use with two load bearing diameters)
d) Rope N (coupling rope)
e) Rope O (coupling rope) NOTE End of ropes are secured to prevent unravelling. Figure 5 — Ropes SIST EN 1263-1:2015
EN 1263-1:2014 (E) 14 5 Designation 5.1 Safety net The designation of a safety net shall include its denomination, reference to this European Standard, the system of the safety net, and details of the mesh size, mesh configuration and net size and production inspection level.
Safety net
EN 1263–1 – S – A 2 – Q90 – 10 × 20 M Denomination
European Standard number
System of safety net S, see 4.2
Class of net A 2, see 4.1
Mesh configuration (Q)and mesh sizes in mm, see Figure 1 a)
Net size in metres
Type of ongoing production inspection level “M”, if Annex B is applied
5.2 Rope The designation of a rope shall include its denomination in accordance with 4.3, Table 2, and a reference to this European Standard. 6 Requirements 6.1 Construction 6.1.1 Mesh rope The mesh rope construction shall have a minimum of three independent threads and shall be constructed in such a way that it cannot unravel. Mesh rope shall be tested in accordance to 7.3. During the test, the mesh rope shall be able to hold the test mass without sustaining the damage. NOTE Knotted net construction is unlikely to exhibit this condition. 6.1.2 Net Nets shall be made with a square (Q) or diamond (D) mesh, see Figure 6 a) and Figure 6 b). The mesh size lM shall not exceed 60 mm for net classes A 1 and B 1 and 100 mm for net classes A 2 and B 2, see Figure 6. The mesh size shall be checked in accordance with 7.2. The loose ends at the edge of the net shall be secured to prevent the net unravelling, see Figure 6. SIST EN 1263-1:2015
EN 1263-1:2014 (E) 15
a) square mesh arrangement (Q) b) diamond mesh arrangement (D) Figure 6 — Mesh size and arrangement 6.1.3 Border rope The border rope shall pass through each mesh at the edges of the net, whether sewn or not. The joint between the ends of a border rope shall be secured against unintentionally becoming undone. This can be achieved, e.g. by splicing. Border rope shall be tested in accordance with 7.3. 6.1.4 Other ropes The ends of all ropes used in safety nets shall be secured against unravelling, e.g. by melting or tying or sewing with rigging yarn. The knots or connections between the ends of ropes within the selvage of a net shall be secured against unintended opening. This can be managed, e.g. by sewed overlocking of a minimum of 200 mm. The internal length of a loop shall be at least 150 mm, see Figure 5. 6.1.5 Test mesh for yearly inspection Safety nets shall be provided with at least one test mesh. The test mesh shall be loosely threaded through the meshes of the net and be attached in the border area. The test mesh shall come from the same production run as that used for the related net. In order to ensure that the test mesh origin can be properly identified (with the related netting), seals with the same identity number shall be fixed to the test mesh and to the related net. SIST EN 1263-1:2015
EN 1263-1:2014 (E) 16 6.1.6 Supporting framework When erected, the framework shall be such that the net can be supported by fixing each mesh rope directly or anchored to it along the edge at intervals not exceeding 2,5 m, using the border rope. While the distance between the gallows (see Figure 4) shall be ≤ 5,00 m, the border rope at the top is supported due to the construction at these distances. 6.2 Tensile strength of ropes 6.2.1 Border rope The Rope K shall have a minimum tensile breaking force of 30,0 kN when tested according to 7.5. The joint between the ends of the Rope K shall have a minimum tensile breaking force of 24,0 kN. The Rope P and the Rope W shall have a minimum tensile breaking force of 20,0 kN when tested according to 7.5. The joint between the ends of the Rope P and Rope W shall have a minimum tensile breaking force of 16,0 kN. The Ropes K, P and W shall be twisted or braided. NOTE 1 The values of the minimum tensile breaking force include a safety factor of 2,0. NOTE 2 Twist means one thread round about another to form a cord. Braid means: Interwoven or plaited.
6.2.2 Tie rope The rope L or M shall have a minimum tensile breaking force of 30,0 kN when tested according to 7.5. The rope R or Z shall have a minimum tensile breaking force of 15,0 kN when tested according to 7.5. The Rope F shall have a minimum tensile breaking force of 20,0 kN when tested in accordance with 7.5. The Ropes F, G, H, R, J, L, M and Z shall be twisted or braided. NOTE The values of the minimum tensile breaking force include a safety factor of 2,0. 6.2.3 Coupling rope Rope N and Rope O shall have a minimum tensile breaking force of 7,5 kN when tested according to 7.5. The Ropes N and O shall be twisted or braided. NOTE The value of the minimum tensile breaking force includes a safety factor of 2,0. 6.3 Energy absorption capacity of the test mesh When testing for yearly inspection it shall be shown that the test mesh has a sufficient resistance with respect to its deterioration due to ageing over a one year period. The sufficient capacity by taking account of ageing shall be verified according to 7.7. 6.4 Static strength of a net sample 6.4.1 Breaking energy The breaking energy EO in kilojoules of a net in the as new state shall be at least: E0 ≥ EN × 1 × 2 SIST EN 1263-1:2015
EN 1263-1:2014 (E) 17 where E0
the breaking energy of a net in the as new state, see 7.4.3; EN
the action value of energy for class N = A and class N = B, see 4.1; 1
the general safety factor; 1 = 1,5 ; 2
the specific coefficient for the deterioration due to ageing, see 7.7 resp. 7.8. 6.4.2 Displacement When testing in accordance with 7.4, the vertical displacement of the test mass up to the point at which the net brakes shall be between 0,8 m and 1,5 m. 6.5 Dynamic strength of safety net System S (net with border rope) System S safety nets (net with border rope) shall be tested in accordance with 7.9. The maximum instantaneous deflection of the net under dynamic action shall not exceed 75 % of the length of the shortest side of the net. The test mass shall be held by the net in each test. Permanent deformation and breaking of several mesh ropes is permitted. 6.6 Dynamic strength of safety net System T (net attached on brackets for horizontal use) Safety nets System T shall be tested according to 7.10. The maximum instantaneous deflection of the net under dynamic action shall not exceed the length of the shortest side of the net. The test mass shall be held by the net in each test. Permanent deformation is permitted. The test mass shall not touch any element of the supporting framework. 6.7 Dynamic strength of safety net System U (net attached to supporting construction for vertical use) System U safety nets shall be tested in accordance with 7.11. The test mass shall be held by the net in each test. Permanent deformation is permitted. The mesh ropes at the edge of the net shall not brake. 6.8 Dynamic strength of safety net System V (net with border rope attached to a gallow type support) Safety nets System V shall be tested according to 7.12. The maximum instantaneous deflection of the net under dynamic action shall not exceed 50 % of the length of the shortest side of the net. The test mass shall be held by the net in each test. Permanent deformation is permitted. 7 Test methods 7.1 General Unless otherwise indicated testing shall be conducted by way of visual examination, length measurement and by weighing. Ropes need not be subjected to further testing if evidence of the tensile strength according to EN ISO 2307 has been furnished by the manufacturer by way of certificates. Prior to the test the nets and ropes shall have been stored at an air temperature of (20 ± 2) °C and a relative humidity of (65 ± 5) % for 72 h. SIST EN 1263-1:2015
EN 1263-1:2014 (E) 18 7.2 Dimensional inspection of the mesh size For the dimensional inspection of the mesh size cut at least 7 meshes in the production sequence (repeating pattern) from the net. Hang the top mesh from a fixing point with a diameter of (11 ± 1) mm. Attach a weight with a mass of (1 + 02,0) kg to the seventh mesh. The weight should hang freely; its fixing point should be (11 ± 1) mm (see Figure 7). The section L is measured over 5 meshes between the connecting point of the first and second mesh and the connecting point of the 6th and 7th mesh. The measureme
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.