{"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\/cs\/posts\/overhead-crane-wire-rope-sizing-without-tables\/","title":{"rendered":"Dimenzov\u00e1n\u00ed ocelov\u00fdch lan mostov\u00e9ho je\u0159\u00e1bu bez tabulek \u2013 metoda rychl\u00e9ho vzorce pro ter\u00e9nn\u00ed in\u017een\u00fdry"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>Obsah<\/p><nav><ul><li><a href=\"#1-determine-the-overhead-crane-wire-rope-safety-factor\">1. Ur\u010dete bezpe\u010dnostn\u00ed faktor pro ocelov\u00e9 lana mostov\u00e9ho je\u0159\u00e1bu<\/a><\/li><li><a href=\"#2-identify-the-overhead-crane-wire-rope-class\">2. Ur\u010dete t\u0159\u00eddu ocelov\u00fdch lan pro mostov\u00e9 je\u0159\u00e1by<\/a><ul><li><a href=\"#class-a-linear-contact-preferred-for-crane-hoisting\">T\u0159\u00edda A \u2013 Line\u00e1rn\u00ed kontakt (preferov\u00e1no pro je\u0159\u00e1bov\u00e9 zved\u00e1n\u00ed)<\/a><\/li><li><a href=\"#class-b-point-contact-secondary-applications\">T\u0159\u00edda B \u2013 bodov\u00fd kontakt (sekund\u00e1rn\u00ed aplikace)<\/a><\/li><\/ul><\/li><li><a href=\"#3-the-quick-diameter-formula-for-overhead-crane-wire-rope-sizing\">3. Vzorec pro rychl\u00fd v\u00fdpo\u010det pr\u016fm\u011bru pro dimenzov\u00e1n\u00ed ocelov\u00e9ho lana mostov\u00e9ho je\u0159\u00e1bu<\/a><ul><li><a href=\"#adjusting-for-different-tensile-grades\">\u00daprava pro r\u016fzn\u00e9 stupn\u011b pevnosti v tahu<\/a><\/li><\/ul><\/li><li><a href=\"#4-rope-weight-estimation\">4. Odhad hmotnosti lana<\/a><\/li><li><a href=\"#5-back-calculating-capacity-from-an-existing-rope\">5. Zp\u011btn\u00fd v\u00fdpo\u010det nosnosti st\u00e1vaj\u00edc\u00edho lana<\/a><\/li><li><a href=\"#6-overhead-crane-wire-rope-end-termination-methods\">6. Metody zakon\u010den\u00ed konc\u016f ocelov\u00fdch lan mostov\u00e9ho je\u0159\u00e1bu<\/a><\/li><li><a href=\"#appendix-class-b-coefficients-point-contact-ropes\">Dodatek: Koeficienty t\u0159\u00eddy B (bod\u00e1 kontaktn\u00ed lana)<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>Kdy\u017e jste na staveni\u0161ti nebo na projektov\u00e9 sch\u016fzce a n\u011bkdo se zept\u00e1: \u201eJak\u00fd pr\u016fm\u011br ocelov\u00e9ho lana pro mostov\u00fd je\u0159\u00e1b pot\u0159ebuji pro X tun?\u201c, mo\u017en\u00e1 nem\u00e1te po ruce normu GB\/T 20118 nebo ISO 2408. Tento \u010dl\u00e1nek p\u0159edstavuje rychl\u00fd vzorec zalo\u017een\u00fd na koeficientech pro ocelov\u00e1 lana pro mostov\u00e9 je\u0159\u00e1by t\u0159\u00eddy 6\u00d719 a 6\u00d736 \u2013 dv\u011b skupiny lan, kter\u00e9 pokr\u00fdvaj\u00ed v\u00edce ne\u017e 90% aplikac\u00ed je\u0159\u00e1bov\u00e9ho zdvihu. Metoda byla ov\u011b\u0159ena podle standardn\u00edch tabulek GB\/T 20118-2017 s chybovou toleranc\u00ed v rozmez\u00ed 2%.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"1-determine-the-overhead-crane-wire-rope-safety-factor\">1. Ur\u010dete bezpe\u010dnostn\u00ed faktor pro ocelov\u00e9 lana mostov\u00e9ho je\u0159\u00e1bu<\/h2>\n\n\n\n<p>Bezpe\u010dnostn\u00ed faktor je pom\u011br minim\u00e1ln\u00ed mezn\u00ed s\u00edly lana k celkov\u00e9mu provozn\u00edmu zat\u00ed\u017een\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>aplikace<\/th><th>Minim\u00e1ln\u00ed bezpe\u010dnostn\u00ed faktor<\/th><\/tr><\/thead><tbody><tr><td>Statick\u00e9 v\u00fdztuhy \/ kotevn\u00ed lana (trval\u00e9 nap\u011bt\u00ed)<\/td><td>3<\/td><\/tr><tr><td>Ru\u010dn\u00ed zdvihac\u00ed za\u0159\u00edzen\u00ed<\/td><td>4<\/td><\/tr><tr><td>Zvedac\u00ed za\u0159\u00edzen\u00ed s pohonem<\/td><td>5\u20136<\/td><\/tr><tr><td>N\u00e1vrh je\u0159\u00e1bu<\/td><td>Dle normy GB\/T 3811 pro konstrukci je\u0159\u00e1b\u016f<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Bezpe\u010dnostn\u00ed faktor ocelov\u00e9ho lana pro mostov\u00e9 je\u0159\u00e1by<\/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>Pro b\u011b\u017en\u00e9 zved\u00e1n\u00ed s elektrick\u00fdm pohonem pou\u017eijte v\u00fdchoz\u00ed hodnotu 5 nebo 6. Pokud b\u0159emeno zahrnuje p\u0159\u00edstup person\u00e1lu nebo je zav\u011b\u0161eno nad kritickou infrastrukturou, pou\u017eijte vy\u0161\u0161\u00ed hodnotu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"2-identify-the-overhead-crane-wire-rope-class\">2. Ur\u010dete t\u0159\u00eddu ocelov\u00fdch lan pro mostov\u00e9 je\u0159\u00e1by<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"class-a-linear-contact-preferred-for-crane-hoisting\">T\u0159\u00edda A \u2013 Line\u00e1rn\u00ed kontakt (preferov\u00e1no pro je\u0159\u00e1bov\u00e9 zved\u00e1n\u00ed)<\/h3>\n\n\n\n<p>Prameny t\u0159\u00eddy 6\u00d719 a 6\u00d736. Dr\u00e1ty v ka\u017ed\u00e9m prameni jsou uspo\u0159\u00e1d\u00e1ny tak, aby ke kontaktu doch\u00e1zelo pod\u00e9l lini\u00ed, nikoli v bodech, co\u017e rovnom\u011brn\u011bji rozkl\u00e1d\u00e1 nap\u011bt\u00ed a zaji\u0161\u0165uje del\u0161\u00ed \u00fanavovou \u017eivotnost. Jedn\u00e1 se o standardn\u00ed volbu pro je\u0159\u00e1bov\u00e9 zdvihac\u00ed mechanismy.<\/p>\n\n\n\n<p>B\u011b\u017en\u00e9 konstrukce: 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>K\u00f3d<\/th><th>V\u00fdznam<\/th><th>Charakteristick\u00fd<\/th><\/tr><\/thead><tbody><tr><td>W<\/td><td>Warrington (st\u0159\u00eddav\u00e9 velikosti dr\u00e1t\u016f ve vn\u011bj\u0161\u00ed vrstv\u011b)<\/td><td>Dobr\u00e1 flexibilita<\/td><\/tr><tr><td>S<\/td><td>Seale (hrub\u00e9 vn\u011bj\u0161\u00ed dr\u00e1ty)<\/td><td>Dobr\u00e1 odolnost proti od\u011bru<\/td><\/tr><tr><td>F<\/td><td>Plnivo (tenk\u00e9 dr\u00e1tky plniva mezi vrstvami)<\/td><td>Kompaktn\u00ed struktura<\/td><\/tr><tr><td>WS<\/td><td>Warrington-Seale kompozit<\/td><td>Nejlep\u0161\u00ed rovnov\u00e1ha mezi flexibilitou a odolnost\u00ed proti \u00fanav\u011b \u2013 nejb\u011b\u017en\u011bj\u0161\u00ed u je\u0159\u00e1b\u016f<\/td><\/tr><tr><td>FC<\/td><td>Vl\u00e1knov\u00e9 j\u00e1dro<\/td><td>Uchov\u00e1v\u00e1 mazivo, je flexibiln\u011bj\u0161\u00ed<\/td><\/tr><tr><td>IWRC<\/td><td>Nez\u00e1visl\u00e9 j\u00e1dro z ocelov\u00e9ho lana<\/td><td>Vy\u0161\u0161\u00ed pevnost v tahu \u2013 p\u0159ibli\u017en\u011b 1,08\u00d7 ekvivalent FC<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Charakteristika je\u0159\u00e1bov\u00e9ho lana<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"class-b-point-contact-secondary-applications\">T\u0159\u00edda B \u2013 bodov\u00fd kontakt (sekund\u00e1rn\u00ed aplikace)<\/h3>\n\n\n\n<p>T\u0159\u00edda 6\u00d719M a t\u0159\u00edda 6\u00d737M. Dr\u00e1ty se k\u0159\u00ed\u017e\u00ed v odd\u011blen\u00fdch bodech, \u010d\u00edm\u017e vznikaj\u00ed koncentrace nap\u011bt\u00ed a ni\u017e\u0161\u00ed odolnost proti \u00fanav\u011b. Nej\u010dast\u011bji se pou\u017e\u00edvaj\u00ed pro statick\u00e1 kotevn\u00ed lana a sekund\u00e1rn\u00ed aplikace.<\/p>\n\n\n\n<p>B\u011b\u017en\u00e9 konstrukce: 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. Vzorec pro rychl\u00fd v\u00fdpo\u010det pr\u016fm\u011bru pro dimenzov\u00e1n\u00ed ocelov\u00e9ho lana mostov\u00e9ho je\u0159\u00e1bu<\/h2>\n\n\n\n<p>Pro t\u0159\u00eddu A, pevnost v tahu 1770 MPa, vl\u00e1knit\u00e9 j\u00e1dro \u2013 nejb\u011b\u017en\u011bj\u0161\u00ed konfigurace ocelov\u00e9ho lana pro mostov\u00e9 je\u0159\u00e1by:<\/p>\n\n\n\n<p>d \u2265 \u221a(T \u00f7 k)<\/p>\n\n\n\n<ul>\n<li>kde: k = 0,06<\/li>\n\n\n\n<li>T = bezpe\u010dn\u00e9 pracovn\u00ed zat\u00ed\u017een\u00ed na lano (tuny)<\/li>\n\n\n\n<li>d = jmenovit\u00fd pr\u016fm\u011br lana (mm)<\/li>\n<\/ul>\n\n\n\n<p>Jednodu\u0161e \u0159e\u010deno: d\u00b2 \u00d7 0,06 = T. \u010ctverec pr\u016fm\u011bru lana v milimetrech vyn\u00e1soben\u00fd 0,06 se rovn\u00e1 bezpe\u010dn\u00e9 pracovn\u00ed nosnosti v tun\u00e1ch.<\/p>\n\n\n\n<p><strong>P\u0159\u00edklad:<\/strong> Jednod\u00edln\u00fd v\u00fdtah o hmotnosti 10 tun vy\u017eaduje d = \u221a(10 \u00f7 0,06) = \u221a166,7 \u2248 12,9 mm \u2192 zaokrouhlete nahoru na <strong>13 mm<\/strong> z \u0159ady standardn\u00edch pr\u016fm\u011br\u016f.<\/p>\n\n\n\n<p>Standardn\u00ed \u0159ada pr\u016fm\u011br\u016f (mm) pro t\u0159\u00eddu 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. (Existuj\u00ed pr\u016fm\u011bry 6 a 7 mm, ale u je\u0159\u00e1bov\u00fdch zdvihac\u00edch za\u0159\u00edzen\u00ed se vyskytuj\u00ed z\u0159\u00eddka; 58 a 60 mm z\u00e1vis\u00ed na konkr\u00e9tn\u00ed konstrukci.)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"adjusting-for-different-tensile-grades\">\u00daprava pro r\u016fzn\u00e9 stupn\u011b pevnosti v tahu<\/h3>\n\n\n\n<p>Z\u00e1kladn\u00ed koeficient k = 0,06 plat\u00ed pro 1770 MPa. Pro ka\u017ed\u00fd stupe\u0148 pevnosti p\u0159ibli\u017en\u011b 90\u2013100 MPa se uprav\u00ed o \u00b10,003:<\/p>\n\n\n\n<p>Postup ve stupni V\u00dd\u0160E: k_i = 0,06 + 0,003 \u00d7 i<\/p>\n\n\n\n<p>Pohyb DOL\u016e ve stupni: k_i = 0,06 \u2013 (0,003 \u00d7 i + 0,001)<\/p>\n\n\n\n<p>Kde i = 0 p\u0159i 1770 MPa. \u0158ada pevnostn\u00edch stup\u0148\u016f v tahu: 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>Tahov\u00e1 pevnost (MPa)<\/th><th>Vl\u00e1knov\u00e9 j\u00e1dro k<\/th><th>Ocelov\u00e9 j\u00e1dro 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\">Tabulka srovn\u00e1n\u00ed hloubky pevnosti v tahu je\u0159\u00e1bov\u00e9ho lana<\/figcaption><\/figure>\n\n\n\n<p><strong>Speci\u00e1ln\u00ed p\u0159\u00edpad pro vl\u00e1knov\u00e9 j\u00e1dro s tlakem 2160 MPa:<\/strong> Vypo\u010d\u00edtan\u00e1 hodnota je 0,072, ale ov\u011b\u0159en\u00fd koeficient je 0,073 \u2013 p\u0159ipo\u010d\u00edtejte dal\u0161\u00edch 0,001. Tato v\u00fdjimka plat\u00ed pouze pro t\u0159\u00eddu 2160.<\/p>\n\n\n\n<p><strong>P\u0159\u00edklad:<\/strong> Pro vl\u00e1knit\u00e9 j\u00e1dro s pevnost\u00ed v tahu 1870 MPa (i = 1) plat\u00ed k = 0,06 + 0,003 = 0,063. Stejn\u00e9 zat\u00ed\u017een\u00ed 10 tun: d = \u221a(10 \u00f7 0,063) = \u221a158,7 \u2248 12,6 mm \u2192 zaokrouhlete nahoru na 13 mm.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"4-rope-weight-estimation\">4. Odhad hmotnosti lana<\/h2>\n\n\n\n<p>Jakmile je vybr\u00e1n pr\u016fm\u011br, p\u0159ibli\u017en\u00e1 hmotnost na 100 metr\u016f:<\/p>\n\n\n\n<p>m_FC = 0,38 \u00d7 d\u00b2 (vl\u00e1knov\u00e9 j\u00e1dro, t\u0159\u00edda A)<\/p>\n\n\n\n<p>m_IWRC = 0,418 \u00d7 d\u00b2 (ocelov\u00e9 j\u00e1dro, t\u0159\u00edda A)<\/p>\n\n\n\n<p>Kde m je hmotnost (kg na 100 m) a d je pr\u016fm\u011br (mm). Hmotnostn\u00ed koeficienty jsou nez\u00e1visl\u00e9 na pevnosti v tahu.<\/p>\n\n\n\n<p><strong>P\u0159\u00edklad:<\/strong> Lano s vl\u00e1knit\u00fdm j\u00e1drem o pr\u016fm\u011bru 13 mm \u2192 m = 0,38 \u00d7 169 = 64 kg na 100 m. P\u00e1d z v\u00fd\u0161ky 30 metr\u016f v\u00e1\u017e\u00ed p\u0159ibli\u017en\u011b 19 kg.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"5-back-calculating-capacity-from-an-existing-rope\">5. Zp\u011btn\u00fd v\u00fdpo\u010det nosnosti st\u00e1vaj\u00edc\u00edho lana<\/h2>\n\n\n\n<p>Pokud na staveni\u0161ti naraz\u00edte na lano bez identifikace \u2013 bez certifik\u00e1tu, bez \u0161t\u00edtku, bez ozna\u010den\u00ed \u2013 zm\u011b\u0159te jeho skute\u010dn\u00fd pr\u016fm\u011br a odhadn\u011bte jeho bezpe\u010dn\u00e9 pracovn\u00ed zat\u00ed\u017een\u00ed:<\/p>\n\n\n\n<p>F = 0,06 \u00d7 d\u00b2 (tuny, t\u0159\u00edda A, 1770 MPa, vl\u00e1knit\u00e9 j\u00e1dro)<\/p>\n\n\n\n<p><strong>P\u0159\u00edklad:<\/strong> Nalezen\u00e9 lano m\u011b\u0159\u00ed 16 mm. F = 0,06 \u00d7 256 = 15,4 tuny bezpe\u010dn\u00e9ho pracovn\u00edho zat\u00ed\u017een\u00ed (za p\u0159edpokladu 1770 MPa, t\u0159\u00edda A, FC). Pro ocelov\u00e9 j\u00e1dro: vyn\u00e1sobte 1,08 \u2192 16,6 tuny.<\/p>\n\n\n\n<p><strong>D\u016fle\u017eit\u00e9:<\/strong> Tento zp\u011btn\u00fd v\u00fdpo\u010det p\u0159edpokl\u00e1d\u00e1 nov\u00e9 lano v p\u016fvodn\u00edm stavu. Nezohled\u0148uje opot\u0159eben\u00ed, korozi, p\u0159etr\u017een\u00e9 dr\u00e1ty ani po\u0161kozen\u00ed \u00fanavou materi\u00e1lu. P\u0159ed spol\u00e9h\u00e1n\u00edm se na nalezen\u00e9 lano pro zved\u00e1n\u00ed v\u017edy prove\u010fte d\u016fkladnou vizu\u00e1ln\u00ed kontrolu a zkontrolujte jej spl\u0148uj\u00edc\u00ed krit\u00e9ria pro vy\u0159azen\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"6-overhead-crane-wire-rope-end-termination-methods\">6. Metody zakon\u010den\u00ed konc\u016f ocelov\u00fdch lan mostov\u00e9ho je\u0159\u00e1bu<\/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>Metoda<\/th><th>Norma<\/th><th>Kl\u00ed\u010dov\u00e9 pravidlo<\/th><\/tr><\/thead><tbody><tr><td><strong>Spony z ocelov\u00e9ho lana<\/strong><\/td><td>GB\/T 5976<\/td><td>d \u2264 16 \u2192 3 klipy; 16 &lt; d \u2264 20 \u2192 4 klipy; 20 &lt; d \u2264 26 \u2192 5 klip\u016f; d &gt; 26 \u2192 6 klip\u016f. Rozte\u010d klip\u016f = (5\u20136) \u00d7 d<\/td><\/tr><tr><td><strong>Kl\u00ednov\u00e1 obj\u00edmka<\/strong><\/td><td>GB\/T 5793<\/td><td>Ocas pevn\u011b omotejte za kl\u00edn; \u010d\u00ednsk\u00e1 norma nena\u0159izuje z\u00e1lo\u017en\u00ed sponu, ale americk\u00e1 praxe (ASME B30.5) ji p\u0159id\u00e1v\u00e1 za kl\u00edn pro v\u011bt\u0161\u00ed bezpe\u010dnost.<\/td><\/tr><tr><td><strong>Hlin\u00edkov\u00e1 obj\u00edmka (kov\u00e1n\u00ed)<\/strong><\/td><td>\u2014<\/td><td>Vy\u017eaduje hydraulick\u00fd lis; ov\u011b\u0159iteln\u00e9 m\u011b\u0159en\u00edm deformace<\/td><\/tr><tr><td><strong>Spojov\u00e1n\u00ed<\/strong><\/td><td>\u2014<\/td><td>Ru\u010dn\u011b sest\u0159\u00edhan\u00e9 oko; tradi\u010dn\u00ed, v pr\u016fmyslov\u00e9m pou\u017eit\u00ed upad\u00e1<\/td><\/tr><tr><td><strong>K\u00f3nick\u00e1 obj\u00edmka (lit\u00fd zinek\/prysky\u0159ice)<\/strong><\/td><td>\u2014<\/td><td>Vysoce pevn\u00e9 zakon\u010den\u00ed pro lana velk\u00e9ho pr\u016fm\u011bru<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Srovn\u00e1vac\u00ed tabulka standard\u016f pro upevn\u011bn\u00ed ocelov\u00fdch lan pro mostov\u00e9 je\u0159\u00e1by<\/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\">Dodatek: Koeficienty t\u0159\u00eddy B (bod\u00e1 kontaktn\u00ed lana)<\/h2>\n\n\n\n<p>Pro bodov\u00e1 lana t\u0159\u00eddy 6\u00d719M a 6\u00d737M, kter\u00e1 se p\u0159i je\u0159\u00e1bov\u00e9m zved\u00e1n\u00ed pou\u017e\u00edvaj\u00ed podstatn\u011b m\u00e9n\u011b:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Parametr<\/th><th>Symbol<\/th><th>Hodnota (FC, 1770 MPa)<\/th><\/tr><\/thead><tbody><tr><td>Z\u00e1kladn\u00ed koeficient<\/td><td>k<\/td><td>0.053<\/td><\/tr><tr><td>\u00daprava stupn\u011b<\/td><td>k_i<\/td><td>0,053 \u00b1 0,003 \u00d7 i (symetrick\u00e9, bez -0,001 nav\u00edc)<\/td><\/tr><tr><td>Hmotnostn\u00ed koeficient (FC)<\/td><td>w1<\/td><td>0.35<\/td><\/tr><tr><td>V\u00e1hov\u00fd koeficient (IWRC)<\/td><td>w2<\/td><td>0.40<\/td><\/tr><tr><td>Bezpe\u010dn\u00e1 kapacita (FC)<\/td><td>F<\/td><td>0,053 \u00d7 d\u00b2 (tuny)<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Pevnost je\u0159\u00e1bov\u00e9ho lana t\u0159\u00eddy B<\/figcaption><\/figure>\n\n\n\n<p><strong>P\u0159\u00edklad pro t\u0159\u00eddu B, 1570 MPa:<\/strong> k = 0,053 \u2013 (0,003 \u00d7 2) = 0,047.<\/p>\n\n\n\n<p><strong>Odkazovan\u00e9 normy (<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\">Dotaz na \u010d\u00ednsk\u00e9 normy pro je\u0159\u00e1by<\/a>):<\/strong><\/p>\n\n\n\n<ul>\n<li>GB\/T 20118-2017 \u2014 Ocelov\u00e1 lana pro v\u0161eobecn\u00e9 pou\u017eit\u00ed (autoritativn\u00ed zdroj pro p\u0159esn\u00e9 hodnoty minim\u00e1ln\u00ed pevnosti v tahu)<\/li>\n\n\n\n<li>GB\/T 5793-2006 \u2014 Kl\u00ednov\u00e9 obj\u00edmky pro ocelov\u00e1 lana<\/li>\n\n\n\n<li>GB\/T 5976-2006 \u2013 Svorky na ocelov\u00e1 lana<\/li>\n<\/ul>\n\n\n\n<p><strong>P\u0159esnost metody:<\/strong> Ov\u011b\u0159eno podle tabulek norem GB\/T 20118-2017. Chyba se u zahrnut\u00fdch konstrukc\u00ed lan obecn\u011b pohybuje v rozmez\u00ed 2%. Jedn\u00e1 se o praktickou metodu v ter\u00e9nu \u2013 pro kone\u010dn\u00e9 technick\u00e9 specifikace v\u017edy ov\u011b\u0159te podle pln\u00e9 normy.<\/p>\n\n\n\n<p>Pokud se chcete dozv\u011bd\u011bt v\u00edce o bezpe\u010dnosti je\u0159\u00e1bov\u00fdch lan, m\u016f\u017eete si p\u0159e\u010d\u00edst tento \u010dl\u00e1nek: <a href=\"https:\/\/www.kscranegroup.com\/cs\/posts\/replacement-and-installing-wire-rope-on-crane\/\">V\u00fdm\u011bna a instalace ocelov\u00e9ho lana na je\u0159\u00e1bu: Kl\u00ed\u010dov\u00e9 aspekty a tipy pro dlouhodobou \u017eivotnost<\/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\/cs\/wp-json\/wp\/v2\/xmxposts\/11865"}],"collection":[{"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":5,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/xmxposts\/11865\/revisions"}],"predecessor-version":[{"id":11876,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/xmxposts\/11865\/revisions\/11876"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/media\/11873"}],"wp:attachment":[{"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/media?parent=11865"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/posts_category?post=11865"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/posts_tag?post=11865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}