{"id":679919,"date":"2022-12-07T11:19:33","date_gmt":"2022-12-07T10:19:33","guid":{"rendered":"https:\/\/rothschenk.de\/dil-26-msl-a-lc-zkratka-s-vyznamem\/"},"modified":"2025-06-30T16:56:48","modified_gmt":"2025-06-30T14:56:48","slug":"dil-26-msl-a-lc-zkratka-s-vyznamem","status":"publish","type":"post","link":"https:\/\/rothschenk.de\/cz\/dil-26-msl-a-lc-zkratka-s-vyznamem\/","title":{"rendered":"D\u00edl 26: MSL a LC – Zkratka s v\u00fdznamem"},"content":{"rendered":"\n

N\u011bkte\u0159\u00ed z v\u00e1s mo\u017en\u00e1 znaj\u00ed p\u0159\u00edslov\u00ed:<\/p>\n\n

„U soudu i na \u0161ir\u00e9m mo\u0159i jste v rukou Bo\u017e\u00edch.“<\/strong><\/p>\n\n

To vyjad\u0159uje, \u017ee jste bezmocn\u00ed a nem\u00e1te \u017e\u00e1dn\u00fd vliv na to, co se d\u011bje.<\/p>\n\n

To se \u010d\u00e1ste\u010dn\u011b t\u00fdk\u00e1 i n\u00e1mo\u0159n\u00ed dopravy. Pravd\u011bpodobn\u011b nejstar\u0161\u00ed p\u0159edpisy o zaji\u0161t\u011bn\u00ed n\u00e1kladu existovaly ji\u017e v n\u00e1mo\u0159n\u00ed doprav\u011b. <\/p>\n\n

V\u0161e muselo b\u00fdt pevn\u011b p\u0159iv\u00e1z\u00e1no a ulo\u017eeno, aby se n\u00e1klad neposunul, lo\u010f se nestala nestabiln\u00ed a p\u0159\u00edpadn\u011b se i nepotopila.<\/p>\n\n

Vzhledem k tomu, \u017ee dne\u0161n\u00ed lod\u011b pluj\u00ed st\u00e1le podle stejn\u00fdch fyzik\u00e1ln\u00edch princip\u016f a mo\u0159e s jeho projevy v\u011btru, vln a proud\u016f nelze stoprocentn\u011b spr\u00e1vn\u011b vyhodnotit ani pomoc\u00ed nejmodern\u011bj\u0161\u00ed technologie, je t\u0159eba pou\u017e\u00edt bezpe\u010dnostn\u00ed faktory.<\/p>\n\n

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Kodex \u010cVUT 2015<\/strong> to podrobn\u011b popisuje v p\u0159\u00edloze 7, kapitola 2.4.<\/p>\n\n\n\n

To n\u00e1s p\u0159iv\u00e1d\u00ed k MSL a LC. MSL<\/strong> znamen\u00e1 „Maximum Securing Load“ a LC<\/strong> znamen\u00e1 „v\u00e1zac\u00ed syst\u00e9m Capacity“ neboli nosnost \u00favazku.<\/p>\n\n\n\n

MSL odpov\u00edd\u00e1 LC. Zkratka MSL se pou\u017e\u00edv\u00e1 p\u0159edev\u0161\u00edm v n\u00e1mo\u0159n\u00ed doprav\u011b, zat\u00edmco zkratka LC se obecn\u011b pou\u017e\u00edv\u00e1 pro pozemn\u00ed dopravu. <\/p>\n<\/div>\n<\/div>\n\n

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Tyto zkratky p\u0159edstavuj\u00ed hodnoty zat\u00ed\u017een\u00ed pro upevn\u011bn\u00ed za\u0159\u00edzen\u00ed nebo p\u0159\u00edstroj\u016f, kter\u00e9 nesm\u00ed b\u00fdt p\u0159i upev\u0148ov\u00e1n\u00ed b\u0159emen p\u0159ekro\u010deny.<\/p>\n\n

Obvykle se ud\u00e1vaj\u00ed v kiloNewtonech (kN). Zaji\u0161\u0165ovac\u00edmi prost\u0159edky mohou b\u00fdt lana, \u0159et\u011bzy nebo p\u00e1sy, ale tak\u00e9 upev\u0148ovac\u00ed body na vozidlech nebo lanyardy. <\/p>\n\n

Z\u00e1kladem pro stanoven\u00ed MSL nebo LC je p\u0159\u00edslu\u0161n\u00e1 s\u00edla p\u0159i p\u0159etr\u017een\u00ed. Jin\u00fdmi slovy, s\u00edla, p\u0159i kter\u00e9 dojde k selh\u00e1n\u00ed zaji\u0161\u0165ovac\u00edho za\u0159\u00edzen\u00ed nebo vybaven\u00ed. <\/p>\n\n

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Zde je p\u0159\u00edklad zlomen\u00e9ho t\u0159menu, kter\u00fd m\u011bl mezn\u00ed zat\u00ed\u017een\u00ed 306 kN a byl zat\u00ed\u017een daleko nad p\u0159\u00edpustnou MSL.<\/p>\n\n\n\n

Maxim\u00e1ln\u00ed zat\u00ed\u017een\u00ed m\u011blo b\u00fdt 153 kN.<\/p>\n<\/div>\n\n\n\n

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P\u0159\u00edklad \u017eelezn\u00e9 ty\u010de, kter\u00e1 se nata\u017een\u00edm z\u00fa\u017e\u00ed a n\u00e1sledn\u011b zlom\u00ed.<\/p>\n<\/div>\n<\/div>\n\n

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K\u00f3d CTU uv\u00e1d\u00ed tuto tabulku s hodnotami MSL pro r\u016fzn\u00e1 zabezpe\u010dovac\u00ed za\u0159\u00edzen\u00ed v p\u0159\u00edloze 7, kapitola 2.4.2.<\/figcaption><\/figure>\n\n

Tyto informace vych\u00e1zej\u00ed z: Pokyny pro spr\u00e1vn\u00e9 ulo\u017een\u00ed a zaji\u0161t\u011bn\u00ed n\u00e1kladu b\u011bhem n\u00e1mo\u0159n\u00ed p\u0159epravy <\/strong>(rezoluce A.714(17)). (Kodex CSS).<\/strong><\/p>\n\n

Jedn\u00e1 se o podrobn\u00fd soubor pravidel s p\u0159\u00edklady v\u00fdpo\u010dtu pro ur\u010dit\u00e1 zat\u00ed\u017een\u00ed. Je zde zaveden dal\u0161\u00ed sou\u010dinitel. <\/p>\n\n

Sou\u010dinitel bezpe\u010dnosti CS<\/strong> (vypo\u010dten\u00e1 pevnost) pro slo\u017eit\u00e9 situace zaji\u0161t\u011bn\u00ed zat\u00ed\u017een\u00ed, aby se vyrovnalo nerovnom\u011brn\u00e9 rozlo\u017een\u00ed p\u016fsob\u00edc\u00edch sil.<\/p>\n\n

P\u0159i v\u00fdpo\u010dtu t\u011bchto obt\u00ed\u017en\u00fdch poplatk\u016f lze vych\u00e1zet z n\u00e1sleduj\u00edc\u00edch hodnot: <\/p>\n\n