{"id":11865,"date":"2026-06-30T05:59:36","date_gmt":"2026-06-30T05:59:36","guid":{"rendered":"https:\/\/www.kscranegroup.com\/?post_type=posts&#038;p=11865"},"modified":"2026-06-30T06:08:57","modified_gmt":"2026-06-30T06:08:57","slug":"overhead-crane-wire-rope-sizing-without-tables","status":"publish","type":"posts","link":"https:\/\/www.kscranegroup.com\/da\/posts\/overhead-crane-wire-rope-sizing-without-tables\/","title":{"rendered":"Dimensionering af st\u00e5lwire til traverskraner uden tabeller \u2014 en feltingeni\u00f8rs hurtige formelmetode"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>Indholdsfortegnelse<\/p><nav><ul><li><a href=\"#1-determine-the-overhead-crane-wire-rope-safety-factor\">1. Bestem sikkerhedsfaktoren for wire til traverskraner<\/a><\/li><li><a href=\"#2-identify-the-overhead-crane-wire-rope-class\">2. Identific\u00e9r klassen af wire til traverskraner<\/a><ul><li><a href=\"#class-a-linear-contact-preferred-for-crane-hoisting\">Klasse A \u2014 Line\u00e6r kontakt (foretrukket til kranl\u00f8ft)<\/a><\/li><li><a href=\"#class-b-point-contact-secondary-applications\">Klasse B \u2014 Punktkontakt (sekund\u00e6re anvendelser)<\/a><\/li><\/ul><\/li><li><a href=\"#3-the-quick-diameter-formula-for-overhead-crane-wire-rope-sizing\">3. Den hurtige diameterformel til dimensionering af wire til traverskraner<\/a><ul><li><a href=\"#adjusting-for-different-tensile-grades\">Justering for forskellige tr\u00e6kstyrker<\/a><\/li><\/ul><\/li><li><a href=\"#4-rope-weight-estimation\">4. Estimering af rebv\u00e6gt<\/a><\/li><li><a href=\"#5-back-calculating-capacity-from-an-existing-rope\">5. Tilbageberegning af kapacitet fra et eksisterende reb<\/a><\/li><li><a href=\"#6-overhead-crane-wire-rope-end-termination-methods\">6. Metoder til endeterminering af wire til traverskraner<\/a><\/li><li><a href=\"#appendix-class-b-coefficients-point-contact-ropes\">Bilag: Klasse B-koefficienter (punktkontaktreb)<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>N\u00e5r du er p\u00e5 en byggeplads eller i et projektm\u00f8de, og nogen sp\u00f8rger &quot;hvilken diameter p\u00e5 en traverskrans st\u00e5lwire skal jeg bruge til X tons?&quot;, har du muligvis ikke GB\/T 20118 eller ISO 2408 ved h\u00e5nden. Denne artikel pr\u00e6senterer en koefficientbaseret hurtig formel for st\u00e5lwirer til traverskraner i klasse 6\u00d719 og 6\u00d736 - de to familier, der d\u00e6kker over 90% af kranhejseanvendelser. Metoden er blevet verificeret i forhold til GB\/T 20118-2017 standardtabeller med en fejlmargen inden for 2%.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"1-determine-the-overhead-crane-wire-rope-safety-factor\">1. Bestem sikkerhedsfaktoren for wire til traverskraner<\/h2>\n\n\n\n<p>Sikkerhedsfaktoren er forholdet mellem rebets minimale brudkraft og den samlede arbejdsbelastning.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Ans\u00f8gning<\/th><th>Minimum sikkerhedsfaktor<\/th><\/tr><\/thead><tbody><tr><td>Statisk afstivning \/ barduner (permanent sp\u00e6nding)<\/td><td>3<\/td><\/tr><tr><td>Manuelt hejseudstyr<\/td><td>4<\/td><\/tr><tr><td>Motoriseret hejseudstyr<\/td><td>5\u20136<\/td><\/tr><tr><td>Krandesign<\/td><td>I henhold til GB\/T 3811 krandesignkode<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Sikkerhedsfaktor for wirewire for traverskraner<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1217\" height=\"1293\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/1Determine-the-Safety-Factor-of-overhead-crane-wire-rope.png\" alt=\"\" class=\"wp-image-11861\"\/><\/figure>\n\n\n\n<p>Ved generel l\u00f8ftning med motordrevet udstyr, standardv\u00e6rdien er 5 eller 6. N\u00e5r lasten involverer personadgang eller h\u00e6nger over kritisk infrastruktur, skal der g\u00e5s h\u00f8jere.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"2-identify-the-overhead-crane-wire-rope-class\">2. Identific\u00e9r klassen af wire til traverskraner<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"class-a-linear-contact-preferred-for-crane-hoisting\">Klasse A \u2014 Line\u00e6r kontakt (foretrukket til kranl\u00f8ft)<\/h3>\n\n\n\n<p>6\u00d719 klasse og 6\u00d736 klasse tr\u00e5de. Tr\u00e5dene i hver tr\u00e5d er arrangeret, s\u00e5 kontakten sker langs linjer snarere end punktvis, hvilket fordeler sp\u00e6ndingen mere j\u00e6vnt og giver bedre udmattelseslevetid. Disse er standardvalget til kranhejsemekanismer.<\/p>\n\n\n\n<p>Almindelige konstruktioner: 6\u00d719S-FC, 6\u00d719S-IWRC, 6\u00d736WS-FC, 6\u00d736WS-IWRC, 6\u00d717S, 6\u00d721S, 6\u00d721F, 6\u00d726WS, 6\u00d719W, 6\u00d725F, 6\u00d731WS, 6\u00d729F, 6\u00d737FS, 6\u00d741WS, 6\u00d746WS, 6\u00d749SWS, 6\u00d755SWS.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Kode<\/th><th>Mening<\/th><th>Karakteristisk<\/th><\/tr><\/thead><tbody><tr><td>W<\/td><td>Warrington (alternerende tr\u00e5dst\u00f8rrelser i det ydre lag)<\/td><td>God fleksibilitet<\/td><\/tr><tr><td>S<\/td><td>Seale (grove ydre tr\u00e5de)<\/td><td>God slidstyrke<\/td><\/tr><tr><td>F<\/td><td>Fyldstof (sm\u00e5 svejsetr\u00e5de mellem lagene)<\/td><td>Kompakt struktur<\/td><\/tr><tr><td>WS<\/td><td>Warrington-Seale-komposit<\/td><td>Bedste balance mellem fleksibilitet og udmattelsesmodstand \u2014 mest almindelig i kraner<\/td><\/tr><tr><td>FC<\/td><td>Fiberkerne<\/td><td>Opbevarer sm\u00f8remiddel, mere fleksibelt<\/td><\/tr><tr><td>IWRC<\/td><td>Uafh\u00e6ngig st\u00e5lwirekerne (st\u00e5l)<\/td><td>H\u00f8jere brudstyrke \u2014 cirka 1,08 gange FC-\u00e6kvivalenten<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Karakteristika for kranens wire reb<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"class-b-point-contact-secondary-applications\">Klasse B \u2014 Punktkontakt (sekund\u00e6re anvendelser)<\/h3>\n\n\n\n<p>6\u00d719M klasse og 6\u00d737M klasse. Tr\u00e5dene krydser hinanden p\u00e5 adskilte punkter, hvilket skaber sp\u00e6ndingskoncentrationer og lavere udmattelsesmodstand. Anvendes mest til statiske barduner og sekund\u00e6re anvendelser.<\/p>\n\n\n\n<p>Almindelige konstruktioner: 6\u00d719M-FC, 6\u00d719M-IWRC, 6\u00d737M-FC, 6\u00d737M-IWRC.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"3-the-quick-diameter-formula-for-overhead-crane-wire-rope-sizing\">3. Den hurtige diameterformel til dimensionering af wire til traverskraner<\/h2>\n\n\n\n<p>For klasse A, 1770 MPa tr\u00e6kstyrke, Fiber Core \u2014 den mest almindelige wirekonfiguration til traverskraner:<\/p>\n\n\n\n<p>d \u2265 \u221a(T \u00f7 k)<\/p>\n\n\n\n<ul>\n<li>hvor: k = 0,06<\/li>\n\n\n\n<li>T = sikker arbejdsbelastning pr. reb (tons)<\/li>\n\n\n\n<li>d = nominel rebdiameter (mm)<\/li>\n<\/ul>\n\n\n\n<p>Kort sagt: d\u00b2 \u00d7 0,06 = T. Kvadratet af rebets diameter i millimeter ganget med 0,06 er lig med den sikre arbejdskapacitet i tons.<\/p>\n\n\n\n<p><strong>Eksempel:<\/strong> En 10-tons enkeltst\u00e5ende lift kr\u00e6ver d = \u221a(10 \u00f7 0,06) = \u221a166,7 \u2248 12,9 mm \u2192 rund op til <strong>13 mm<\/strong> fra standarddiameterserien.<\/p>\n\n\n\n<p>Standarddiameterserien (mm) for Klasse A: 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56. (6 og 7 mm findes, men er sj\u00e6ldne ved kranl\u00f8ft; 58 og 60 mm afh\u00e6nger af den specifikke konstruktion.)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"adjusting-for-different-tensile-grades\">Justering for forskellige tr\u00e6kstyrker<\/h3>\n\n\n\n<p>Basiskoefficienten k = 0,06 g\u00e6lder for 1770 MPa. For hvert stigningstrin p\u00e5 cirka 90-100 MPa justeres med \u00b10,003:<\/p>\n\n\n\n<p>Opadg\u00e5ende stigning i stigning: k_i = 0,06 + 0,003 \u00d7 i<\/p>\n\n\n\n<p>Bev\u00e6gelse NED i h\u00e6ldning: k_i = 0,06 \u2013 (0,003 \u00d7 i + 0,001)<\/p>\n\n\n\n<p>Hvor i = 0 ved 1770 MPa. Tr\u00e6kstyrkeserien: 1570 \u2192 1670 \u2192 1770 \u2192 1870 \u2192 1960 \u2192 2160 MPa.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Tr\u00e6kstyrke (MPa)<\/th><th>Fiber Core k<\/th><th>St\u00e5lkerne k (= FC \u00d7 1,08)<\/th><\/tr><\/thead><tbody><tr><td>1570<\/td><td>0.053<\/td><td>0.057<\/td><\/tr><tr><td>1670<\/td><td>0.056<\/td><td>0.061<\/td><\/tr><tr><td>1770<\/td><td>0.060<\/td><td>0.064<\/td><\/tr><tr><td>1870<\/td><td>0.063<\/td><td>0.068<\/td><\/tr><tr><td>1960<\/td><td>0.066<\/td><td>0.071<\/td><\/tr><tr><td>2160<\/td><td>0.073 <\/td><td>0.079<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Sammenligningstabel for tr\u00e6kstyrkedybde for kranwire<\/figcaption><\/figure>\n\n\n\n<p><strong>Specialtilf\u00e6lde for 2160 MPa fiberkerne:<\/strong> Den beregnede v\u00e6rdi er 0,072, men den verificerede koefficient er 0,073 \u2014 tilf\u00f8j yderligere 0,001. Denne undtagelse g\u00e6lder kun for kvalitet 2160.<\/p>\n\n\n\n<p><strong>Eksempel:<\/strong> For en fiberkerne p\u00e5 1870 MPa (i = 1), k = 0,06 + 0,003 = 0,063. Den samme 10-tons belastning: d = \u221a(10 \u00f7 0,063) = \u221a158,7 \u2248 12,6 mm \u2192 rund op til 13 mm.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"4-rope-weight-estimation\">4. Estimering af rebv\u00e6gt<\/h2>\n\n\n\n<p>N\u00e5r diameteren er valgt, omtrentlig v\u00e6gt pr. 100 meter:<\/p>\n\n\n\n<p>m_FC = 0,38 \u00d7 d\u00b2 (fiberkerne, klasse A)<\/p>\n\n\n\n<p>m_IWRC = 0,418 \u00d7 d\u00b2 (st\u00e5lkerne, klasse A)<\/p>\n\n\n\n<p>Hvor m er v\u00e6gt (kg pr. 100 m) og d er diameter (mm). V\u00e6gtkoefficienterne er uafh\u00e6ngige af tr\u00e6kstyrken.<\/p>\n\n\n\n<p><strong>Eksempel:<\/strong> 13 mm fiberkernereb \u2192 m = 0,38 \u00d7 169 = 64 kg pr. 100 m. Et fald p\u00e5 30 meter vejer cirka 19 kg.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"5-back-calculating-capacity-from-an-existing-rope\">5. Tilbageberegning af kapacitet fra et eksisterende reb<\/h2>\n\n\n\n<p>N\u00e5r du st\u00f8der p\u00e5 et reb p\u00e5 stedet uden identifikation \u2013 intet certifikat, intet m\u00e6rke, ingen m\u00e6rkning \u2013 skal du m\u00e5le dets faktiske diameter og estimere dets sikre arbejdsbelastning:<\/p>\n\n\n\n<p>F = 0,06 \u00d7 d\u00b2 (tons, klasse A, 1770 MPa, fiberkerne)<\/p>\n\n\n\n<p><strong>Eksempel:<\/strong> Et fundent reb m\u00e5ler 16 mm. F = 0,06 \u00d7 256 = 15,4 tons sikker arbejdsbelastning (forudsat 1770 MPa, klasse A, FC). For st\u00e5lkerne: gang med 1,08 \u2192 16,6 tons.<\/p>\n\n\n\n<p><strong>Vigtig:<\/strong> Denne tilbageregning foruds\u00e6tter et nyt reb i original stand. Den tager ikke h\u00f8jde for slid, korrosion, kn\u00e6kkede wirer eller udmattelsesskader. Udf\u00f8r altid en grundig visuel inspektion og kontroller i forhold til kasseringskriterier, f\u00f8r du bruger et fundet reb til l\u00f8ft.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"6-overhead-crane-wire-rope-end-termination-methods\">6. Metoder til endeterminering af wire til traverskraner<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1463\" height=\"1075\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/2Overhead-Crane-Wire-Rope-End-Termination-Methods.png\" alt=\"\" class=\"wp-image-11862\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Metode<\/th><th>Standard<\/th><th>N\u00f8gleregel<\/th><\/tr><\/thead><tbody><tr><td><strong>St\u00e5lwireklemmer<\/strong><\/td><td>GB\/T 5976<\/td><td>d \u2264 16 \u2192 3 klip; 16 &lt; d \u2264 20 \u2192 4 klip; 20 &lt; d \u2264 26 \u2192 5 klip; d &gt; 26 \u2192 6 klip. Klipafstand = (5\u20136) \u00d7 d<\/td><\/tr><tr><td><strong>Kilemuffe<\/strong><\/td><td>GB\/T 5793<\/td><td>Vikl halen t\u00e6t bag kilen; kinesisk standard kr\u00e6ver ikke en backup-klips, men amerikansk praksis (ASME B30.5) tilf\u00f8jer en bag kilen for ekstra sikkerhed<\/td><\/tr><tr><td><strong>Aluminiumsr\u00f8r (s\u00e6nksmedning)<\/strong><\/td><td>\u2014<\/td><td>Kr\u00e6ver hydraulisk presse; kan verificeres ved deformationsm\u00e5ling<\/td><\/tr><tr><td><strong>Splejsning<\/strong><\/td><td>\u2014<\/td><td>H\u00e5ndsplejset \u00f8je; traditionelt, faldende i industriel brug<\/td><\/tr><tr><td><strong>Konisk muffe (h\u00e6ldt zink\/harpiks)<\/strong><\/td><td>\u2014<\/td><td>H\u00f8jstyrketerminering til reb med stor diameter<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Sammenligningstabel for standardmontering af wire til traverskraner<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1319\" height=\"1193\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/3Overhead-Crane-Wire-Rope-End-Termination-Methods1.png\" alt=\"\" class=\"wp-image-11863\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1011\" height=\"706\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/4Overhead-Crane-Wire-Rope-End-Termination-Methods2.jpg\" alt=\"\" class=\"wp-image-11864\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"appendix-class-b-coefficients-point-contact-ropes\">Bilag: Klasse B-koefficienter (punktkontaktreb)<\/h2>\n\n\n\n<p>For punktkontaktreb i klasse 6\u00d719M og 6\u00d737M, som anvendes betydeligt mindre i kranhejsning:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Parameter<\/th><th>Symbol<\/th><th>V\u00e6rdi (FC, 1770 MPa)<\/th><\/tr><\/thead><tbody><tr><td>Basiskoefficient<\/td><td>k<\/td><td>0.053<\/td><\/tr><tr><td>Justering af niveau<\/td><td>k_i<\/td><td>0,053 \u00b1 0,003 \u00d7 i (symmetrisk, ingen ekstra -0,001)<\/td><\/tr><tr><td>V\u00e6gtkoefficient (FC)<\/td><td>w1<\/td><td>0.35<\/td><\/tr><tr><td>V\u00e6gtkoefficient (IWRC)<\/td><td>w2<\/td><td>0.40<\/td><\/tr><tr><td>Sikker kapacitet (FC)<\/td><td>F<\/td><td>0,053 \u00d7 d\u00b2 (tons)<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Styrken af klasse B kranwire<\/figcaption><\/figure>\n\n\n\n<p><strong>Eksempel for klasse B, 1570 MPa:<\/strong> k = 0,053 \u2013 (0,003 \u00d7 2) = 0,047.<\/p>\n\n\n\n<p><strong>Refererede standarder (<a href=\"https:\/\/openstd.samr.gov.cn\/bzgk\/std\/std_list?p.p1=0&amp;p.p90=circulation_date&amp;p.p91=desc&amp;p.p2=%E8%B5%B7%E9%87%8D%E6%9C%BA\" target=\"_blank\" rel=\"noopener\">Foresp\u00f8rgsel om kinesiske kranstandarder<\/a>):<\/strong><\/p>\n\n\n\n<ul>\n<li>GB\/T 20118-2017 \u2014 St\u00e5lwirer til generelle form\u00e5l (autoritativ kilde til n\u00f8jagtige minimumsbrudkraftv\u00e6rdier)<\/li>\n\n\n\n<li>GB\/T 5793-2006 \u2014 Kilehylstre til st\u00e5lwire<\/li>\n\n\n\n<li>GB\/T 5976-2006 \u2014 St\u00e5lwireklemmer<\/li>\n<\/ul>\n\n\n\n<p><strong>Metodens n\u00f8jagtighed:<\/strong> Verificeret i forhold til GB\/T 20118-2017 standardtabeller. Fejlen ligger generelt inden for 2% for de d\u00e6kkede rebkonstruktioner. Dette er en praktisk feltmetode \u2014 for endelige tekniske specifikationer skal du altid verificere i forhold til den fulde standard.<\/p>\n\n\n\n<p>Hvis du vil vide mere om sikkerheden ved kranwirer, kan du l\u00e6se denne artikel: <a href=\"https:\/\/www.kscranegroup.com\/da\/posts\/replacement-and-installing-wire-rope-on-crane\/\">Udskiftning og montering af st\u00e5lwire p\u00e5 kran: Vigtige overvejelser og tips til langsigtet holdbarhed<\/a><\/p>","protected":false},"excerpt":{"rendered":"When you are on a job site or in a project meeting and someone asks &#8220;what diameter overhead crane wire rope do I need for X tonnes?&#8221;, you may not have GB\/T 20118 or ISO 2408 at hand. This article pres","protected":false},"featured_media":11873,"parent":0,"menu_order":0,"template":"single-SEO-Table.php","posts_category":[189],"posts_tag":[816,801,817,815,121,820,818,814,813,819],"acf":[],"_links":{"self":[{"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/xmxposts\/11865"}],"collection":[{"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":5,"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/xmxposts\/11865\/revisions"}],"predecessor-version":[{"id":11876,"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/xmxposts\/11865\/revisions\/11876"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/media\/11873"}],"wp:attachment":[{"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/media?parent=11865"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/posts_category?post=11865"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/da\/wp-json\/wp\/v2\/posts_tag?post=11865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}