Kalkylator f\u00f6r dynamisk kranlast | P_d = \u03c6\u00b7(Q+Q_h+G_t)<\/title>\n <style>\n \/* all styles are strictly scoped inside #calculator *\/\n #calculator {\n --primary-color: #0a3487;\n --primary-hover: #F58423;\n --error-color: #e53935;\n --bg-color: #EAEEF7;\n --text-color: #4a4a4a;\n \n display: block;\n width: 100%;\n background: var(--bg-color);\n font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;\n color: var(--text-color);\n }\n \n \/* container for PC max-width & padding *\/\n #calculator .calculator-container {\n max-width: 545px;\n padding: 30px;\n margin: 0 auto;\n background: var(--bg-color);\n box-sizing: border-box;\n }\n \n \/* typography *\/\n #calculator .calculator-title {\n font-size: 24px;\n font-weight: 600;\n margin: 0 0 4px 0;\n color: var(--primary-color);\n letter-spacing: -0.2px;\n }\n \n #calculator .calculator-subtitle {\n font-size: 14px;\n margin: 0 0 24px 0;\n font-family: monospace;\n background: rgba(10,52,135,0.08);\n display: inline-block;\n padding: 4px 12px;\n border-radius: 0;\n color: var(--primary-color);\n }\n \n \/* input groups *\/\n #calculator .input-group {\n margin-bottom: 20px;\n width: 100%;\n position: relative;\n }\n \n #calculator label {\n display: block;\n font-size: 14px;\n font-weight: 500;\n margin-bottom: 6px;\n color: var(--text-color);\n }\n \n #calculator .var-symbol {\n font-family: monospace;\n font-weight: 700;\n background: rgba(0,0,0,0.04);\n padding: 0px 4px;\n border-radius: 0;\n margin-left: 4px;\n }\n \n \/* wrapper for input + inline unit (unit placed inside input field on the right) *\/\n #calculator .input-unit-wrapper {\n position: relative;\n width: 100%;\n }\n \n #calculator .input-unit-wrapper .calculator-input {\n width: 100%;\n padding-right: 104px;\n }\n \n #calculator .inline-unit {\n position: absolute;\n right: 1px;\n top: 1px;\n bottom: 1px;\n display: flex;\n align-items: center;\n justify-content: center;\n font-size: 14px;\n font-weight: 500;\n color: #aaaaaa;\n background: transparent;\n padding: 0 8px;\n height: auto;\n line-height: 1;\n white-space: nowrap;\n font-family: monospace;\n pointer-events: none;\n box-sizing: border-box;\n }\n \n \/* select styling \u2014 no unit after select *\/\n #calculator .calculator-input,\n #calculator .calculator-select {\n width: 100%;\n height: 36px;\n padding: 0 12px;\n font-size: 16px;\n border: 1px solid #ccc;\n border-radius: 0;\n background: white;\n font-family: 'Segoe UI', 'SF Mono', monospace;\n color: #333;\n transition: all 0.2s ease;\n box-sizing: border-box;\n }\n \n #calculator .calculator-select {\n cursor: pointer;\n appearance: none;\n background-image: url('data:image\/svg+xml;utf8,<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"%234a4a4a\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"6 9 12 15 18 9\"><\/polyline><\/svg>');\n background-repeat: no-repeat;\n background-position: right 12px center;\n background-size: 14px;\n }\n \n \/* ensure dropdown options have consistent font and spacing *\/\n #calculator .calculator-select option {\n font-size: 14px;\n padding: 8px;\n font-family: 'Segoe UI', 'SF Mono', monospace;\n line-height: 1.4;\n color: #333;\n }\n \n #calculator .calculator-input:focus,\n #calculator .calculator-select:focus {\n outline: none;\n border: 2px solid var(--primary-color);\n padding: 0 11px;\n height: 36px;\n }\n \n #calculator .input-unit-wrapper .calculator-input:focus {\n padding-right: 103px;\n }\n \n \/* error state: border 2px solid error-color *\/\n #calculator .calculator-input.error-input,\n #calculator .calculator-select.error-input {\n border: 2px solid var(--error-color);\n padding: 0 11px;\n height: 36px;\n }\n \n #calculator .input-unit-wrapper .calculator-input.error-input {\n padding-right: 103px;\n }\n \n \/* error message styling *\/\n #calculator .error-msg {\n font-size: 12px;\n color: var(--error-color);\n margin-top: 5px;\n display: none;\n line-height: 1.2;\n }\n \n #calculator .error-msg.visible {\n display: block;\n }\n \n \/* result area *\/\n #calculator .result-area {\n background: white;\n margin: 20px 0 24px 0;\n padding: 18px 16px;\n text-align: center;\n border-left: 4px solid var(--primary-color);\n box-shadow: 0 1px 3px rgba(0,0,0,0.05);\n }\n \n #calculator .result-label {\n font-size: 14px;\n font-weight: 500;\n text-transform: uppercase;\n letter-spacing: 1px;\n color: var(--text-color);\n margin-bottom: 8px;\n }\n \n #calculator .result-value {\n font-size: 40px;\n font-weight: 800;\n font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;\n color: var(--primary-color);\n line-height: 1.1;\n word-break: break-word;\n }\n \n #calculator .calculation-detail {\n font-size: 12px;\n font-family: monospace;\n color: #6b7280;\n margin-top: 8px;\n border-top: 1px solid #ececec;\n padding-top: 6px;\n }\n \n \/* button group: horizontal flex on PC *\/\n #calculator .button-group {\n display: flex;\n flex-direction: row;\n gap: 16px;\n margin-top: 8px;\n }\n \n #calculator button {\n flex: 1;\n height: 36px;\n font-size: 14px;\n font-weight: 600;\n border: none;\n border-radius: 0;\n cursor: pointer;\n transition: all 0.2s ease;\n font-family: inherit;\n }\n \n #calculator .btn-primary {\n background: var(--primary-color);\n color: white;\n }\n \n #calculator .btn-primary:hover {\n background: var(--primary-hover);\n }\n \n #calculator .btn-secondary {\n background: #6c757d;\n color: white;\n }\n \n #calculator .btn-secondary:hover {\n background: #5a6268;\n }\n \n \/* mobile responsiveness (rem based, following spec) *\/\n @media (max-width: 768px) {\n #calculator .calculator-container {\n padding: 20px;\n max-width: 100%;\n }\n #calculator .calculator-input,\n #calculator .calculator-select,\n #calculator button,\n #calculator .inline-unit {\n height: 0.7rem;\n font-size: 0.28rem;\n line-height: 0.7rem;\n }\n #calculator .calculator-input,\n #calculator .calculator-select {\n height: 0.7rem;\n padding: 0 0.2rem;\n font-size: 0.28rem;\n }\n #calculator .input-unit-wrapper .calculator-input {\n padding-right: 1.8rem;\n }\n #calculator .calculator-input:focus,\n #calculator .calculator-select:focus {\n padding: 0 0.18rem;\n height: 0.7rem;\n }\n #calculator .input-unit-wrapper .calculator-input:focus {\n padding-right: 1.78rem;\n }\n #calculator .calculator-input.error-input,\n #calculator .calculator-select.error-input {\n padding: 0 0.18rem;\n height: 0.7rem;\n }\n #calculator .input-unit-wrapper .calculator-input.error-input {\n padding-right: 1.78rem;\n }\n #calculator label {\n font-size: 0.28rem;\n }\n #calculator .result-value {\n font-size: 0.7rem;\n }\n #calculator .result-label,\n #calculator .calculation-detail {\n font-size: 0.24rem;\n }\n #calculator .btn-primary,\n #calculator .btn-secondary {\n font-size: 0.28rem;\n height: 0.7rem;\n }\n #calculator .button-group {\n flex-direction: column;\n gap: 12px;\n }\n #calculator button {\n width: 100%;\n }\n #calculator .calculator-title {\n font-size: 0.5rem;\n }\n #calculator .calculator-subtitle {\n font-size: 0.24rem;\n }\n #calculator .inline-unit {\n font-size: 0.28rem;\n padding: 0 0.2rem;\n }\n \/* option text slightly smaller on mobile but consistent *\/\n #calculator .calculator-select option {\n font-size: 0.28rem;\n }\n }\n \n \/* error priority: error border overrides focus *\/\n #calculator .calculator-input.error-input:focus,\n #calculator .calculator-select.error-input:focus {\n border: 2px solid var(--error-color);\n }\n \n \/* remove any default spinner on number input *\/\n #calculator .calculator-input[type=\"number\"] {\n -moz-appearance: textfield;\n }\n #calculator .calculator-input[type=\"number\"]::-webkit-inner-spin-button,\n #calculator .calculator-input[type=\"number\"]::-webkit-outer-spin-button {\n -webkit-appearance: none;\n margin: 0;\n }\n <\/style>\n<\/head>\n<body>\n<div id=\"calculator\">\n <div class=\"calculator-container\">\n \n \n \n <div class=\"input-group\">\n <label for=\"calculator-phi\">Dynamisk faktor <span class=\"var-symbol\">\u03c6<\/span><\/label>\n <select id=\"calculator-phi\" class=\"calculator-select\">\n <option value=\"1.1\">\ud83d\udd38 L\u00e5g hastighet \/ l\u00e4tt drift \/ precisionsreglering \u2192 \u03c6 = 1,10<\/option>\n <option value=\"1.2\">\ud83d\udd38 Konventionell industriell (l\u00e4tt) \u2192 \u03c6 = 1,20<\/option>\n <option value=\"1.25\" selected>\ud83d\udd38 Konventionell industriell (medel) \u2192 \u03c6 = 1,25<\/option>\n <option value=\"1.3\">\ud83d\udd38 Konventionell industri (tung) \u2192 \u03c6 = 1,30<\/option>\n <option value=\"1.4\">\ud83d\udd38 Tung drift \/ kr\u00e4vande drift \u2192 \u03c6 = 1,40<\/option>\n <option value=\"1.5\">\ud83d\udd38H\u00f6g slagkraft \/ kvarnbelastning \u2192 \u03c6 = 1,50<\/option>\n <option value=\"1.6\">\ud83d\udd38Extrem st\u00f6t \/ h\u00e5rd belastning \u2192 \u03c6 = 1,60<\/option>\n <\/select>\n <div class=\"error-msg\" id=\"error-phi\"><\/div>\n <\/div>\n\n \n <div class=\"input-group\">\n <label for=\"calculator-ratedLoad\">Nominell belastning <span class=\"var-symbol\">Q<\/span><\/label>\n <div class=\"input-unit-wrapper\">\n <input type=\"number\" id=\"calculator-ratedLoad\" class=\"calculator-input\" placeholder=\"t.ex. 20,0\" step=\"any\" value=\"20.0\">\n <span class=\"inline-unit\">ton (t)<\/span>\n <\/div>\n <div class=\"error-msg\" id=\"error-ratedLoad\"><\/div>\n <\/div>\n\n \n <div class=\"input-group\">\n <label for=\"calculator-hookWeight\">Krok- och f\u00e4stmassa <span class=\"var-symbol\">Q<sub>h<\/sub><\/span><\/label>\n <div class=\"input-unit-wrapper\">\n <input type=\"number\" id=\"calculator-hookWeight\" class=\"calculator-input\" placeholder=\"t.ex. 0,6\" step=\"any\" value=\"0.6\">\n <span class=\"inline-unit\">ton (t)<\/span>\n <\/div>\n <div class=\"error-msg\" id=\"error-hookWeight\"><\/div>\n <\/div>\n\n \n <div class=\"input-group\">\n <label for=\"calculator-trolleyWeight\">Vagnens egenvikt <span class=\"var-symbol\">G<sub>t<\/sub><\/span><\/label>\n <div class=\"input-unit-wrapper\">\n <input type=\"number\" id=\"calculator-trolleyWeight\" class=\"calculator-input\" placeholder=\"t.ex. 5,4\" step=\"any\" value=\"5.4\">\n <span class=\"inline-unit\">ton (t)<\/span>\n <\/div>\n <div class=\"error-msg\" id=\"error-trolleyWeight\"><\/div>\n <\/div>\n\n \n <div class=\"result-area\">\n <div class=\"result-label\">Dynamiskt belastningsresultat <span>P<sub>d<\/sub><\/span><\/div>\n <div class=\"result-value\" id=\"calculator-result\">\u2014 kN<\/div>\n <div class=\"calculation-detail\" id=\"calc-detail\"><\/div>\n <\/div>\n\n \n <div class=\"button-group\">\n <button id=\"calculator-calcBtn\" class=\"btn-primary\">Kalkylera<\/button>\n <button id=\"calculator-resetBtn\" class=\"btn-secondary\">\u00c5terst\u00e4lla<\/button>\n <\/div>\n <\/div>\n<\/div>\n\n<script>\n (function() {\n \/\/ DOM references\n const phiSelect = document.getElementById('calculator-phi');\n const ratedLoadInput = document.getElementById('calculator-ratedLoad');\n const hookWeightInput = document.getElementById('calculator-hookWeight');\n const trolleyWeightInput = document.getElementById('calculator-trolleyWeight');\n const calcBtn = document.getElementById('calculator-calcBtn');\n const resetBtn = document.getElementById('calculator-resetBtn');\n const resultSpan = document.getElementById('calculator-result');\n const calcDetailSpan = document.getElementById('calc-detail');\n \n \/\/ error message containers\n const errorPhi = document.getElementById('error-phi');\n const errorRated = document.getElementById('error-ratedLoad');\n const errorHook = document.getElementById('error-hookWeight');\n const errorTrolley = document.getElementById('error-trolleyWeight');\n \n \/\/ input fields for validation\n const inputFields = [\n { element: ratedLoadInput, errorDiv: errorRated, name: 'Rated load' },\n { element: hookWeightInput, errorDiv: errorHook, name: 'Hook & attachment mass' },\n { element: trolleyWeightInput, errorDiv: errorTrolley, name: 'Trolley self-weight' }\n ];\n const selectField = { element: phiSelect, errorDiv: errorPhi, name: 'Dynamic factor' };\n \n \/\/ conversion factor: tonnes -> kN\n const TON_TO_KN = 9.80665;\n \n \/\/ Helper: clear error for a single input (remove class, hide message)\n function clearErrorForInput(inputEl, errorDiv) {\n if (inputEl) inputEl.classList.remove('error-input');\n if (errorDiv) errorDiv.classList.remove('visible');\n }\n \n \/\/ set error for single input\n function setErrorForInput(inputEl, errorDiv, message) {\n if (inputEl) inputEl.classList.add('error-input');\n if (errorDiv) {\n errorDiv.textContent = message || 'Invalid value';\n errorDiv.classList.add('visible');\n }\n }\n \n \/\/ clear all errors\n function clearAllErrors() {\n inputFields.forEach(field => {\n clearErrorForInput(field.element, field.errorDiv);\n });\n clearErrorForInput(selectField.element, selectField.errorDiv);\n }\n \n \/\/ validate single numeric input (non-empty, valid number >=0)\n function validateSingleInput(value, fieldName) {\n if (value === undefined || value === null || value === '') {\n return { valid: false, message: `${fieldName} cannot be empty.` };\n }\n const num = parseFloat(value);\n if (isNaN(num)) {\n return { valid: false, message: `${fieldName} must be a valid number.` };\n }\n if (num < 0) {\n return { valid: false, message: `${fieldName} cannot be negative.` };\n }\n return { valid: true, value: num };\n }\n \n \/\/ validate phi select\n function validatePhi() {\n const phiVal = phiSelect.value;\n const num = parseFloat(phiVal);\n if (isNaN(num)) {\n return { valid: false, message: 'Dynamic factor must be a valid number.' };\n }\n if (num <= 0) {\n return { valid: false, message: '\u03c6 must be greater than 0.' };\n }\n return { valid: true, value: num };\n }\n \n \/\/ main validation routine\n function validateAllInputs() {\n let isValid = true;\n \n \/\/ Validate rated load\n const ratedRaw = ratedLoadInput.value;\n const ratedCheck = validateSingleInput(ratedRaw, 'Rated load');\n if (!ratedCheck.valid) {\n setErrorForInput(ratedLoadInput, errorRated, ratedCheck.message);\n isValid = false;\n } else {\n clearErrorForInput(ratedLoadInput, errorRated);\n }\n \n \/\/ Validate hook weight\n const hookRaw = hookWeightInput.value;\n const hookCheck = validateSingleInput(hookRaw, 'Hook & attachment mass');\n if (!hookCheck.valid) {\n setErrorForInput(hookWeightInput, errorHook, hookCheck.message);\n isValid = false;\n } else {\n clearErrorForInput(hookWeightInput, errorHook);\n }\n \n \/\/ Validate trolley weight\n const trolleyRaw = trolleyWeightInput.value;\n const trolleyCheck = validateSingleInput(trolleyRaw, 'Trolley self-weight');\n if (!trolleyCheck.valid) {\n setErrorForInput(trolleyWeightInput, errorTrolley, trolleyCheck.message);\n isValid = false;\n } else {\n clearErrorForInput(trolleyWeightInput, errorTrolley);\n }\n \n \/\/ Validate phi\n const phiCheck = validatePhi();\n if (!phiCheck.valid) {\n setErrorForInput(phiSelect, errorPhi, phiCheck.message);\n isValid = false;\n } else {\n clearErrorForInput(phiSelect, errorPhi);\n }\n \n if (isValid) {\n return {\n valid: true,\n Q: parseFloat(ratedLoadInput.value),\n Qh: parseFloat(hookWeightInput.value),\n Gt: parseFloat(trolleyWeightInput.value),\n phi: parseFloat(phiSelect.value)\n };\n } else {\n return { valid: false };\n }\n }\n \n \/\/ compute and update result (2 decimals)\n function computeAndDisplay() {\n const validation = validateAllInputs();\n if (!validation.valid) {\n resultSpan.textContent = '-- kN';\n calcDetailSpan.textContent = '';\n return;\n }\n \n const { Q, Qh, Gt, phi } = validation;\n const sumTon = Q + Qh + Gt;\n const dynamicTonForce = phi * sumTon;\n const dynamicKN = dynamicTonForce * TON_TO_KN;\n const roundedKN = Math.round(dynamicKN * 100) \/ 100;\n resultSpan.textContent = roundedKN.toFixed(2) + ' kN';\n \n \/\/ detail expression: consistent formatting\n const sumFixed = sumTon.toFixed(3);\n const phiFixed = phi.toFixed(3);\n calcDetailSpan.innerHTML = `${phiFixed} \u00d7 (${Q.toFixed(2)} + ${Qh.toFixed(2)} + ${Gt.toFixed(2)}) t = ${phiFixed} \u00d7 ${sumFixed} t = ${dynamicTonForce.toFixed(3)} t \u2192 ${roundedKN.toFixed(2)} kN`;\n }\n \n \/\/ reset all inputs to default values, clear errors & reset result\n function resetCalculator() {\n ratedLoadInput.value = '20.0';\n hookWeightInput.value = '0.6';\n trolleyWeightInput.value = '5.4';\n phiSelect.value = '1.25'; \/\/ medium duty default\n \n clearAllErrors();\n \n \/\/ reset result display\n resultSpan.textContent = '-- kN';\n calcDetailSpan.textContent = '';\n \n \/\/ additionally, remove error classes from all inputs (already cleared, but ensure)\n inputFields.forEach(field => {\n field.element.classList.remove('error-input');\n });\n if (phiSelect) phiSelect.classList.remove('error-input');\n }\n \n \/\/ setup dynamic error clearing on input\/change\n function setupDynamicErrorClearing() {\n ratedLoadInput.addEventListener('input', function() {\n clearErrorForInput(ratedLoadInput, errorRated);\n });\n hookWeightInput.addEventListener('input', function() {\n clearErrorForInput(hookWeightInput, errorHook);\n });\n trolleyWeightInput.addEventListener('input', function() {\n clearErrorForInput(trolleyWeightInput, errorTrolley);\n });\n phiSelect.addEventListener('change', function() {\n clearErrorForInput(phiSelect, errorPhi);\n });\n }\n \n \/\/ calculate action\n function onCalculate() {\n computeAndDisplay();\n }\n \n \/\/ reset action\n function onReset() {\n resetCalculator();\n }\n \n \/\/ initialization\n function init() {\n setupDynamicErrorClearing();\n calcBtn.addEventListener('click', onCalculate);\n resetBtn.addEventListener('click', onReset);\n \/\/ initial compute with default values (shows result on page load)\n computeAndDisplay();\n }\n \n if (document.readyState === 'loading') {\n document.addEventListener('DOMContentLoaded', init);\n } else {\n init();\n }\n })();\n<\/script>\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\">Formel f\u00f6r dynamisk lastber\u00e4kning av kran<\/h2>\n\n\n\n<p>P<sub>d<\/sub>=\u03c6(Q+Q<sub>h<\/sub>+G<sub>t<\/sub>)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>P<sub>d<\/sub>Dynamisk belastning<\/li>\n\n\n\n<li>\u03c6: P\u00e5verkansfaktor<\/li>\n\n\n\n<li>F: Nominell belastning<\/li>\n\n\n\n<li>Q<sub>h<\/sub>Krok och lyftredskapets vikt<\/li>\n\n\n\n<li>G<sub>t<\/sub>Vagnens egenvikt<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Anteckningar<\/h2>\n\n\n\n<p>Vid faktisk krandrift \u00e4r krafterna som verkar p\u00e5 den alltid st\u00f6rre \u00e4n den statiska belastningen. Lyft- och starteffekten, tr\u00f6gheten vid bromsning, vibrationerna fr\u00e5n motoraccelerationen och de dynamiska krafterna fr\u00e5n lastens sv\u00e4ngningar f\u00f6rst\u00e4rks. D\u00e4rf\u00f6r m\u00e5ste dessa faktorer multipliceras med en dynamisk lastfaktor under ber\u00e4kningarna.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>F\u00f6r l\u00e5g hastighet, l\u00e4tt belastning eller exakt styrning, \u03c6=1,1<\/li>\n\n\n\n<li>F\u00f6r konventionella industrikranar, \u03c6=1,2\u20131,3<\/li>\n\n\n\n<li>F\u00f6r tunga eller tuffa arbetsf\u00f6rh\u00e5llanden, eller drifttillst\u00e5nd med betydande p\u00e5verkan, \u03c6=1,4\u20131,6<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Till\u00e4mpliga kranar<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Luftkranar<\/li>\n\n\n\n<li>Gnatry-kranar<\/li>\n\n\n\n<li>Elektriska vagnar\/lyftar<\/li>\n\n\n\n<li>Hamnkranar<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Icke till\u00e4mplig situation<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H\u00f6ghastighets roterande maskiner (turbiner, motorer)<\/li>\n\n\n\n<li>Precisionsmaskinverktygsspindelsystem<\/li>\n\n\n\n<li>Intelligent lyftsystem (automatisk anti-svajningskontroll)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"K\u00e4rnv\u00e4rdet med kranens dynamiska belastningskalkylator \u00e4r att den \u00e5terspeglar extra belastningar som uppst\u00e5r vid faktisk drift ist\u00e4llet f\u00f6r enbart statisk lyftvikt, f\u00f6r att exakt kunna utv\u00e4rdera effekterna av dynamiska beteenden som lyftstart, bromsning, k\u00f6rst\u00f6tar, vibrationer och lastens sv\u00e4ngningar p\u00e5 krankonstruktioner och mekanismer. Den st\u00f6der effektivt kontroll av h\u00e5llfasthet och nedb\u00f6jning av huvudbalkar, analys av \u00e4ndbalkstryck och r\u00e4lssp\u00e4nning, samt typval och s\u00e4kerhetsverifiering av motorer, bromsar och andra kritiska komponenter, och fungerar som en viktig grund f\u00f6r konstruktionsdesign, livsl\u00e4ngdsbed\u00f6mning och s\u00e4kerhetscertifiering av traverskranar och portalkranar enligt ISO-, FEM-, EN- och GB-standarder.","protected":false},"author":8,"featured_media":17038,"parent":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"single-onlinetools.php","format":"standard","meta":{"_acf_changed":false,"rank_math_lock_modified_date":false,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[63],"tags":[],"class_list":["post-17030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-other"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/posts\/17030"}],"collection":[{"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/comments?post=17030"}],"version-history":[{"count":6,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/posts\/17030\/revisions"}],"predecessor-version":[{"id":17039,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/posts\/17030\/revisions\/17039"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/media\/17038"}],"wp:attachment":[{"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/media?parent=17030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/categories?post=17030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/tags?post=17030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":17030,"date":"2026-05-22T01:39:17","date_gmt":"2026-05-22T01:39:17","guid":{"rendered":"https:\/\/www.dgcrane.com\/?p=17030"},"modified":"2026-05-22T01:59:01","modified_gmt":"2026-05-22T01:59:01","slug":"crane-dynamic-loading-calculator","status":"publish","type":"post","link":"https:\/\/www.dgcrane.com\/sv\/crane-dynamic-loading-calculator\/","title":{"rendered":"Kran Dynamisk Lastkalkylator"},"content":{"rendered":"\n\n\n \n \n Kalkylator f\u00f6r dynamisk kranlast | P_d = \u03c6\u00b7(Q+Q_h+G_t)<\/title>\n <style>\n \/* all styles are strictly scoped inside #calculator *\/\n #calculator {\n --primary-color: #0a3487;\n --primary-hover: #F58423;\n --error-color: #e53935;\n --bg-color: #EAEEF7;\n --text-color: #4a4a4a;\n \n display: block;\n width: 100%;\n background: var(--bg-color);\n font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;\n color: var(--text-color);\n }\n \n \/* container for PC max-width & padding *\/\n #calculator .calculator-container {\n max-width: 545px;\n padding: 30px;\n margin: 0 auto;\n background: var(--bg-color);\n box-sizing: border-box;\n }\n \n \/* typography *\/\n #calculator .calculator-title {\n font-size: 24px;\n font-weight: 600;\n margin: 0 0 4px 0;\n color: var(--primary-color);\n letter-spacing: -0.2px;\n }\n \n #calculator .calculator-subtitle {\n font-size: 14px;\n margin: 0 0 24px 0;\n font-family: monospace;\n background: rgba(10,52,135,0.08);\n display: inline-block;\n padding: 4px 12px;\n border-radius: 0;\n color: var(--primary-color);\n }\n \n \/* input groups *\/\n #calculator .input-group {\n margin-bottom: 20px;\n width: 100%;\n position: relative;\n }\n \n #calculator label {\n display: block;\n font-size: 14px;\n font-weight: 500;\n margin-bottom: 6px;\n color: var(--text-color);\n }\n \n #calculator .var-symbol {\n font-family: monospace;\n font-weight: 700;\n background: rgba(0,0,0,0.04);\n padding: 0px 4px;\n border-radius: 0;\n margin-left: 4px;\n }\n \n \/* wrapper for input + inline unit (unit placed inside input field on the right) *\/\n #calculator .input-unit-wrapper {\n position: relative;\n width: 100%;\n }\n \n #calculator .input-unit-wrapper .calculator-input {\n width: 100%;\n padding-right: 104px;\n }\n \n #calculator .inline-unit {\n position: absolute;\n right: 1px;\n top: 1px;\n bottom: 1px;\n display: flex;\n align-items: center;\n justify-content: center;\n font-size: 14px;\n font-weight: 500;\n color: #aaaaaa;\n background: transparent;\n padding: 0 8px;\n height: auto;\n line-height: 1;\n white-space: nowrap;\n font-family: monospace;\n pointer-events: none;\n box-sizing: border-box;\n }\n \n \/* select styling \u2014 no unit after select *\/\n #calculator .calculator-input,\n #calculator .calculator-select {\n width: 100%;\n height: 36px;\n padding: 0 12px;\n font-size: 16px;\n border: 1px solid #ccc;\n border-radius: 0;\n background: white;\n font-family: 'Segoe UI', 'SF Mono', monospace;\n color: #333;\n transition: all 0.2s ease;\n box-sizing: border-box;\n }\n \n #calculator .calculator-select {\n cursor: pointer;\n appearance: none;\n background-image: url('data:image\/svg+xml;utf8,<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"%234a4a4a\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"6 9 12 15 18 9\"><\/polyline><\/svg>');\n background-repeat: no-repeat;\n background-position: right 12px center;\n background-size: 14px;\n }\n \n \/* ensure dropdown options have consistent font and spacing *\/\n #calculator .calculator-select option {\n font-size: 14px;\n padding: 8px;\n font-family: 'Segoe UI', 'SF Mono', monospace;\n line-height: 1.4;\n color: #333;\n }\n \n #calculator .calculator-input:focus,\n #calculator .calculator-select:focus {\n outline: none;\n border: 2px solid var(--primary-color);\n padding: 0 11px;\n height: 36px;\n }\n \n #calculator .input-unit-wrapper .calculator-input:focus {\n padding-right: 103px;\n }\n \n \/* error state: border 2px solid error-color *\/\n #calculator .calculator-input.error-input,\n #calculator .calculator-select.error-input {\n border: 2px solid var(--error-color);\n padding: 0 11px;\n height: 36px;\n }\n \n #calculator .input-unit-wrapper .calculator-input.error-input {\n padding-right: 103px;\n }\n \n \/* error message styling *\/\n #calculator .error-msg {\n font-size: 12px;\n color: var(--error-color);\n margin-top: 5px;\n display: none;\n line-height: 1.2;\n }\n \n #calculator .error-msg.visible {\n display: block;\n }\n \n \/* result area *\/\n #calculator .result-area {\n background: white;\n margin: 20px 0 24px 0;\n padding: 18px 16px;\n text-align: center;\n border-left: 4px solid var(--primary-color);\n box-shadow: 0 1px 3px rgba(0,0,0,0.05);\n }\n \n #calculator .result-label {\n font-size: 14px;\n font-weight: 500;\n text-transform: uppercase;\n letter-spacing: 1px;\n color: var(--text-color);\n margin-bottom: 8px;\n }\n \n #calculator .result-value {\n font-size: 40px;\n font-weight: 800;\n font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;\n color: var(--primary-color);\n line-height: 1.1;\n word-break: break-word;\n }\n \n #calculator .calculation-detail {\n font-size: 12px;\n font-family: monospace;\n color: #6b7280;\n margin-top: 8px;\n border-top: 1px solid #ececec;\n padding-top: 6px;\n }\n \n \/* button group: horizontal flex on PC *\/\n #calculator .button-group {\n display: flex;\n flex-direction: row;\n gap: 16px;\n margin-top: 8px;\n }\n \n #calculator button {\n flex: 1;\n height: 36px;\n font-size: 14px;\n font-weight: 600;\n border: none;\n border-radius: 0;\n cursor: pointer;\n transition: all 0.2s ease;\n font-family: inherit;\n }\n \n #calculator .btn-primary {\n background: var(--primary-color);\n color: white;\n }\n \n #calculator .btn-primary:hover {\n background: var(--primary-hover);\n }\n \n #calculator .btn-secondary {\n background: #6c757d;\n color: white;\n }\n \n #calculator .btn-secondary:hover {\n background: #5a6268;\n }\n \n \/* mobile responsiveness (rem based, following spec) *\/\n @media (max-width: 768px) {\n #calculator .calculator-container {\n padding: 20px;\n max-width: 100%;\n }\n #calculator .calculator-input,\n #calculator .calculator-select,\n #calculator button,\n #calculator .inline-unit {\n height: 0.7rem;\n font-size: 0.28rem;\n line-height: 0.7rem;\n }\n #calculator .calculator-input,\n #calculator .calculator-select {\n height: 0.7rem;\n padding: 0 0.2rem;\n font-size: 0.28rem;\n }\n #calculator .input-unit-wrapper .calculator-input {\n padding-right: 1.8rem;\n }\n #calculator .calculator-input:focus,\n #calculator .calculator-select:focus {\n padding: 0 0.18rem;\n height: 0.7rem;\n }\n #calculator .input-unit-wrapper .calculator-input:focus {\n padding-right: 1.78rem;\n }\n #calculator .calculator-input.error-input,\n #calculator .calculator-select.error-input {\n padding: 0 0.18rem;\n height: 0.7rem;\n }\n #calculator .input-unit-wrapper .calculator-input.error-input {\n padding-right: 1.78rem;\n }\n #calculator label {\n font-size: 0.28rem;\n }\n #calculator .result-value {\n font-size: 0.7rem;\n }\n #calculator .result-label,\n #calculator .calculation-detail {\n font-size: 0.24rem;\n }\n #calculator .btn-primary,\n #calculator .btn-secondary {\n font-size: 0.28rem;\n height: 0.7rem;\n }\n #calculator .button-group {\n flex-direction: column;\n gap: 12px;\n }\n #calculator button {\n width: 100%;\n }\n #calculator .calculator-title {\n font-size: 0.5rem;\n }\n #calculator .calculator-subtitle {\n font-size: 0.24rem;\n }\n #calculator .inline-unit {\n font-size: 0.28rem;\n padding: 0 0.2rem;\n }\n \/* option text slightly smaller on mobile but consistent *\/\n #calculator .calculator-select option {\n font-size: 0.28rem;\n }\n }\n \n \/* error priority: error border overrides focus *\/\n #calculator .calculator-input.error-input:focus,\n #calculator .calculator-select.error-input:focus {\n border: 2px solid var(--error-color);\n }\n \n \/* remove any default spinner on number input *\/\n #calculator .calculator-input[type=\"number\"] {\n -moz-appearance: textfield;\n }\n #calculator .calculator-input[type=\"number\"]::-webkit-inner-spin-button,\n #calculator .calculator-input[type=\"number\"]::-webkit-outer-spin-button {\n -webkit-appearance: none;\n margin: 0;\n }\n <\/style>\n<\/head>\n<body>\n<div id=\"calculator\">\n <div class=\"calculator-container\">\n \n \n \n <div class=\"input-group\">\n <label for=\"calculator-phi\">Dynamisk faktor <span class=\"var-symbol\">\u03c6<\/span><\/label>\n <select id=\"calculator-phi\" class=\"calculator-select\">\n <option value=\"1.1\">\ud83d\udd38 L\u00e5g hastighet \/ l\u00e4tt drift \/ precisionsreglering \u2192 \u03c6 = 1,10<\/option>\n <option value=\"1.2\">\ud83d\udd38 Konventionell industriell (l\u00e4tt) \u2192 \u03c6 = 1,20<\/option>\n <option value=\"1.25\" selected>\ud83d\udd38 Konventionell industriell (medel) \u2192 \u03c6 = 1,25<\/option>\n <option value=\"1.3\">\ud83d\udd38 Konventionell industri (tung) \u2192 \u03c6 = 1,30<\/option>\n <option value=\"1.4\">\ud83d\udd38 Tung drift \/ kr\u00e4vande drift \u2192 \u03c6 = 1,40<\/option>\n <option value=\"1.5\">\ud83d\udd38H\u00f6g slagkraft \/ kvarnbelastning \u2192 \u03c6 = 1,50<\/option>\n <option value=\"1.6\">\ud83d\udd38Extrem st\u00f6t \/ h\u00e5rd belastning \u2192 \u03c6 = 1,60<\/option>\n <\/select>\n <div class=\"error-msg\" id=\"error-phi\"><\/div>\n <\/div>\n\n \n <div class=\"input-group\">\n <label for=\"calculator-ratedLoad\">Nominell belastning <span class=\"var-symbol\">Q<\/span><\/label>\n <div class=\"input-unit-wrapper\">\n <input type=\"number\" id=\"calculator-ratedLoad\" class=\"calculator-input\" placeholder=\"t.ex. 20,0\" step=\"any\" value=\"20.0\">\n <span class=\"inline-unit\">ton (t)<\/span>\n <\/div>\n <div class=\"error-msg\" id=\"error-ratedLoad\"><\/div>\n <\/div>\n\n \n <div class=\"input-group\">\n <label for=\"calculator-hookWeight\">Krok- och f\u00e4stmassa <span class=\"var-symbol\">Q<sub>h<\/sub><\/span><\/label>\n <div class=\"input-unit-wrapper\">\n <input type=\"number\" id=\"calculator-hookWeight\" class=\"calculator-input\" placeholder=\"t.ex. 0,6\" step=\"any\" value=\"0.6\">\n <span class=\"inline-unit\">ton (t)<\/span>\n <\/div>\n <div class=\"error-msg\" id=\"error-hookWeight\"><\/div>\n <\/div>\n\n \n <div class=\"input-group\">\n <label for=\"calculator-trolleyWeight\">Vagnens egenvikt <span class=\"var-symbol\">G<sub>t<\/sub><\/span><\/label>\n <div class=\"input-unit-wrapper\">\n <input type=\"number\" id=\"calculator-trolleyWeight\" class=\"calculator-input\" placeholder=\"t.ex. 5,4\" step=\"any\" value=\"5.4\">\n <span class=\"inline-unit\">ton (t)<\/span>\n <\/div>\n <div class=\"error-msg\" id=\"error-trolleyWeight\"><\/div>\n <\/div>\n\n \n <div class=\"result-area\">\n <div class=\"result-label\">Dynamiskt belastningsresultat <span>P<sub>d<\/sub><\/span><\/div>\n <div class=\"result-value\" id=\"calculator-result\">\u2014 kN<\/div>\n <div class=\"calculation-detail\" id=\"calc-detail\"><\/div>\n <\/div>\n\n \n <div class=\"button-group\">\n <button id=\"calculator-calcBtn\" class=\"btn-primary\">Kalkylera<\/button>\n <button id=\"calculator-resetBtn\" class=\"btn-secondary\">\u00c5terst\u00e4lla<\/button>\n <\/div>\n <\/div>\n<\/div>\n\n<script>\n (function() {\n \/\/ DOM references\n const phiSelect = document.getElementById('calculator-phi');\n const ratedLoadInput = document.getElementById('calculator-ratedLoad');\n const hookWeightInput = document.getElementById('calculator-hookWeight');\n const trolleyWeightInput = document.getElementById('calculator-trolleyWeight');\n const calcBtn = document.getElementById('calculator-calcBtn');\n const resetBtn = document.getElementById('calculator-resetBtn');\n const resultSpan = document.getElementById('calculator-result');\n const calcDetailSpan = document.getElementById('calc-detail');\n \n \/\/ error message containers\n const errorPhi = document.getElementById('error-phi');\n const errorRated = document.getElementById('error-ratedLoad');\n const errorHook = document.getElementById('error-hookWeight');\n const errorTrolley = document.getElementById('error-trolleyWeight');\n \n \/\/ input fields for validation\n const inputFields = [\n { element: ratedLoadInput, errorDiv: errorRated, name: 'Rated load' },\n { element: hookWeightInput, errorDiv: errorHook, name: 'Hook & attachment mass' },\n { element: trolleyWeightInput, errorDiv: errorTrolley, name: 'Trolley self-weight' }\n ];\n const selectField = { element: phiSelect, errorDiv: errorPhi, name: 'Dynamic factor' };\n \n \/\/ conversion factor: tonnes -> kN\n const TON_TO_KN = 9.80665;\n \n \/\/ Helper: clear error for a single input (remove class, hide message)\n function clearErrorForInput(inputEl, errorDiv) {\n if (inputEl) inputEl.classList.remove('error-input');\n if (errorDiv) errorDiv.classList.remove('visible');\n }\n \n \/\/ set error for single input\n function setErrorForInput(inputEl, errorDiv, message) {\n if (inputEl) inputEl.classList.add('error-input');\n if (errorDiv) {\n errorDiv.textContent = message || 'Invalid value';\n errorDiv.classList.add('visible');\n }\n }\n \n \/\/ clear all errors\n function clearAllErrors() {\n inputFields.forEach(field => {\n clearErrorForInput(field.element, field.errorDiv);\n });\n clearErrorForInput(selectField.element, selectField.errorDiv);\n }\n \n \/\/ validate single numeric input (non-empty, valid number >=0)\n function validateSingleInput(value, fieldName) {\n if (value === undefined || value === null || value === '') {\n return { valid: false, message: `${fieldName} cannot be empty.` };\n }\n const num = parseFloat(value);\n if (isNaN(num)) {\n return { valid: false, message: `${fieldName} must be a valid number.` };\n }\n if (num < 0) {\n return { valid: false, message: `${fieldName} cannot be negative.` };\n }\n return { valid: true, value: num };\n }\n \n \/\/ validate phi select\n function validatePhi() {\n const phiVal = phiSelect.value;\n const num = parseFloat(phiVal);\n if (isNaN(num)) {\n return { valid: false, message: 'Dynamic factor must be a valid number.' };\n }\n if (num <= 0) {\n return { valid: false, message: '\u03c6 must be greater than 0.' };\n }\n return { valid: true, value: num };\n }\n \n \/\/ main validation routine\n function validateAllInputs() {\n let isValid = true;\n \n \/\/ Validate rated load\n const ratedRaw = ratedLoadInput.value;\n const ratedCheck = validateSingleInput(ratedRaw, 'Rated load');\n if (!ratedCheck.valid) {\n setErrorForInput(ratedLoadInput, errorRated, ratedCheck.message);\n isValid = false;\n } else {\n clearErrorForInput(ratedLoadInput, errorRated);\n }\n \n \/\/ Validate hook weight\n const hookRaw = hookWeightInput.value;\n const hookCheck = validateSingleInput(hookRaw, 'Hook & attachment mass');\n if (!hookCheck.valid) {\n setErrorForInput(hookWeightInput, errorHook, hookCheck.message);\n isValid = false;\n } else {\n clearErrorForInput(hookWeightInput, errorHook);\n }\n \n \/\/ Validate trolley weight\n const trolleyRaw = trolleyWeightInput.value;\n const trolleyCheck = validateSingleInput(trolleyRaw, 'Trolley self-weight');\n if (!trolleyCheck.valid) {\n setErrorForInput(trolleyWeightInput, errorTrolley, trolleyCheck.message);\n isValid = false;\n } else {\n clearErrorForInput(trolleyWeightInput, errorTrolley);\n }\n \n \/\/ Validate phi\n const phiCheck = validatePhi();\n if (!phiCheck.valid) {\n setErrorForInput(phiSelect, errorPhi, phiCheck.message);\n isValid = false;\n } else {\n clearErrorForInput(phiSelect, errorPhi);\n }\n \n if (isValid) {\n return {\n valid: true,\n Q: parseFloat(ratedLoadInput.value),\n Qh: parseFloat(hookWeightInput.value),\n Gt: parseFloat(trolleyWeightInput.value),\n phi: parseFloat(phiSelect.value)\n };\n } else {\n return { valid: false };\n }\n }\n \n \/\/ compute and update result (2 decimals)\n function computeAndDisplay() {\n const validation = validateAllInputs();\n if (!validation.valid) {\n resultSpan.textContent = '-- kN';\n calcDetailSpan.textContent = '';\n return;\n }\n \n const { Q, Qh, Gt, phi } = validation;\n const sumTon = Q + Qh + Gt;\n const dynamicTonForce = phi * sumTon;\n const dynamicKN = dynamicTonForce * TON_TO_KN;\n const roundedKN = Math.round(dynamicKN * 100) \/ 100;\n resultSpan.textContent = roundedKN.toFixed(2) + ' kN';\n \n \/\/ detail expression: consistent formatting\n const sumFixed = sumTon.toFixed(3);\n const phiFixed = phi.toFixed(3);\n calcDetailSpan.innerHTML = `${phiFixed} \u00d7 (${Q.toFixed(2)} + ${Qh.toFixed(2)} + ${Gt.toFixed(2)}) t = ${phiFixed} \u00d7 ${sumFixed} t = ${dynamicTonForce.toFixed(3)} t \u2192 ${roundedKN.toFixed(2)} kN`;\n }\n \n \/\/ reset all inputs to default values, clear errors & reset result\n function resetCalculator() {\n ratedLoadInput.value = '20.0';\n hookWeightInput.value = '0.6';\n trolleyWeightInput.value = '5.4';\n phiSelect.value = '1.25'; \/\/ medium duty default\n \n clearAllErrors();\n \n \/\/ reset result display\n resultSpan.textContent = '-- kN';\n calcDetailSpan.textContent = '';\n \n \/\/ additionally, remove error classes from all inputs (already cleared, but ensure)\n inputFields.forEach(field => {\n field.element.classList.remove('error-input');\n });\n if (phiSelect) phiSelect.classList.remove('error-input');\n }\n \n \/\/ setup dynamic error clearing on input\/change\n function setupDynamicErrorClearing() {\n ratedLoadInput.addEventListener('input', function() {\n clearErrorForInput(ratedLoadInput, errorRated);\n });\n hookWeightInput.addEventListener('input', function() {\n clearErrorForInput(hookWeightInput, errorHook);\n });\n trolleyWeightInput.addEventListener('input', function() {\n clearErrorForInput(trolleyWeightInput, errorTrolley);\n });\n phiSelect.addEventListener('change', function() {\n clearErrorForInput(phiSelect, errorPhi);\n });\n }\n \n \/\/ calculate action\n function onCalculate() {\n computeAndDisplay();\n }\n \n \/\/ reset action\n function onReset() {\n resetCalculator();\n }\n \n \/\/ initialization\n function init() {\n setupDynamicErrorClearing();\n calcBtn.addEventListener('click', onCalculate);\n resetBtn.addEventListener('click', onReset);\n \/\/ initial compute with default values (shows result on page load)\n computeAndDisplay();\n }\n \n if (document.readyState === 'loading') {\n document.addEventListener('DOMContentLoaded', init);\n } else {\n init();\n }\n })();\n<\/script>\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\">Formel f\u00f6r dynamisk lastber\u00e4kning av kran<\/h2>\n\n\n\n<p>P<sub>d<\/sub>=\u03c6(Q+Q<sub>h<\/sub>+G<sub>t<\/sub>)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>P<sub>d<\/sub>Dynamisk belastning<\/li>\n\n\n\n<li>\u03c6: P\u00e5verkansfaktor<\/li>\n\n\n\n<li>F: Nominell belastning<\/li>\n\n\n\n<li>Q<sub>h<\/sub>Krok och lyftredskapets vikt<\/li>\n\n\n\n<li>G<sub>t<\/sub>Vagnens egenvikt<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Anteckningar<\/h2>\n\n\n\n<p>Vid faktisk krandrift \u00e4r krafterna som verkar p\u00e5 den alltid st\u00f6rre \u00e4n den statiska belastningen. Lyft- och starteffekten, tr\u00f6gheten vid bromsning, vibrationerna fr\u00e5n motoraccelerationen och de dynamiska krafterna fr\u00e5n lastens sv\u00e4ngningar f\u00f6rst\u00e4rks. D\u00e4rf\u00f6r m\u00e5ste dessa faktorer multipliceras med en dynamisk lastfaktor under ber\u00e4kningarna.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>F\u00f6r l\u00e5g hastighet, l\u00e4tt belastning eller exakt styrning, \u03c6=1,1<\/li>\n\n\n\n<li>F\u00f6r konventionella industrikranar, \u03c6=1,2\u20131,3<\/li>\n\n\n\n<li>F\u00f6r tunga eller tuffa arbetsf\u00f6rh\u00e5llanden, eller drifttillst\u00e5nd med betydande p\u00e5verkan, \u03c6=1,4\u20131,6<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Till\u00e4mpliga kranar<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Luftkranar<\/li>\n\n\n\n<li>Gnatry-kranar<\/li>\n\n\n\n<li>Elektriska vagnar\/lyftar<\/li>\n\n\n\n<li>Hamnkranar<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Icke till\u00e4mplig situation<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H\u00f6ghastighets roterande maskiner (turbiner, motorer)<\/li>\n\n\n\n<li>Precisionsmaskinverktygsspindelsystem<\/li>\n\n\n\n<li>Intelligent lyftsystem (automatisk anti-svajningskontroll)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"K\u00e4rnv\u00e4rdet med kranens dynamiska belastningskalkylator \u00e4r att den \u00e5terspeglar extra belastningar som uppst\u00e5r vid faktisk drift ist\u00e4llet f\u00f6r enbart statisk lyftvikt, f\u00f6r att exakt kunna utv\u00e4rdera effekterna av dynamiska beteenden som lyftstart, bromsning, k\u00f6rst\u00f6tar, vibrationer och lastens sv\u00e4ngningar p\u00e5 krankonstruktioner och mekanismer. Den st\u00f6der effektivt kontroll av h\u00e5llfasthet och nedb\u00f6jning av huvudbalkar, analys av \u00e4ndbalkstryck och r\u00e4lssp\u00e4nning, samt typval och s\u00e4kerhetsverifiering av motorer, bromsar och andra kritiska komponenter, och fungerar som en viktig grund f\u00f6r konstruktionsdesign, livsl\u00e4ngdsbed\u00f6mning och s\u00e4kerhetscertifiering av traverskranar och portalkranar enligt ISO-, FEM-, EN- och GB-standarder.","protected":false},"author":8,"featured_media":17038,"parent":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"single-onlinetools.php","format":"standard","meta":{"_acf_changed":false,"rank_math_lock_modified_date":false,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[63],"tags":[],"class_list":["post-17030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-other"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/posts\/17030"}],"collection":[{"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/comments?post=17030"}],"version-history":[{"count":6,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/posts\/17030\/revisions"}],"predecessor-version":[{"id":17039,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/posts\/17030\/revisions\/17039"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/media\/17038"}],"wp:attachment":[{"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/media?parent=17030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/categories?post=17030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dgcrane.com\/sv\/wp-json\/wp\/v2\/tags?post=17030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}