{"id":17096,"date":"2026-06-12T09:45:14","date_gmt":"2026-06-12T09:45:14","guid":{"rendered":"https:\/\/www.dgcrane.com\/?p=17096"},"modified":"2026-06-15T06:35:38","modified_gmt":"2026-06-15T06:35:38","slug":"crane-drum-minimum-diameter-calculator","status":"publish","type":"post","link":"https:\/\/www.dgcrane.com\/ur\/crane-drum-minimum-diameter-calculator\/","title":{"rendered":"\u06a9\u0631\u06cc\u0646 \u0688\u0631\u0645 \u06a9\u0645 \u0627\u0632 \u06a9\u0645 \u0642\u0637\u0631 \u06a9\u0627 \u06a9\u06cc\u0644\u06a9\u0648\u0644\u06cc\u0679\u0631"},"content":{"rendered":"<div id=\"calculator\">\n    <style>\n        #calculator {\n            --primary-color: #0a3487;\n            --primary-hover: #F58423;\n            --error-color: #e53935;\n            --bg-color: #EAEEF7;\n            --text-color: #4a4a4a;\n            max-width: 545px;\n            padding: 30px;\n            background-color: var(--bg-color);\n            color: var(--text-color);\n            font-family: Arial, sans-serif;\n            box-sizing: border-box;\n        }\n\n        #calculator .calc-title {\n            font-size: 18px;\n            margin: 0 0 20px 0;\n            text-align: center;\n            font-weight: 600;\n        }\n\n        #calculator .calc-row {\n            margin-bottom: 18px;\n        }\n\n        #calculator label {\n            display: block;\n            font-size: 14px;\n            margin-bottom: 6px;\n        }\n\n        #calculator input,\n        #calculator select {\n            width: 100%;\n            height: 36px;\n            padding: 0 10px;\n            border: 1px solid #ccc;\n            border-radius: 0;\n            font-size: 16px;\n            box-sizing: border-box;\n            transition: border 0.2s ease;\n            background: #fff;\n        }\n\n        #calculator input:focus,\n        #calculator select:focus {\n            outline: none;\n            border: 2px solid var(--primary-color);\n        }\n\n        #calculator .input-error {\n            border: 2px solid var(--error-color) !important;\n        }\n\n        #calculator .error-msg {\n            display: none;\n            font-size: 12px;\n            color: var(--error-color);\n            margin-top: 4px;\n        }\n\n        #calculator .error-msg.show {\n            display: block;\n        }\n\n        #calculator .btn-group {\n            display: flex;\n            gap: 10px;\n            margin: 20px 0;\n        }\n\n        #calculator button {\n            flex: 1;\n            height: 34px;\n            line-height: 34px;\n            border: none;\n            border-radius: 0;\n            font-size: 14px;\n            cursor: pointer;\n            transition: background-color 0.2s ease;\n            background-color: var(--primary-color);\n            color: #fff;\n        }\n\n        #calculator button:hover {\n            background-color: var(--primary-hover);\n        }\n\n        #calculator .result-wrap {\n            margin-top: 20px;\n            padding: 12px;\n            border: 1px solid #ccc;\n            background: #fff;\n        }\n\n        #calculator .result-text {\n            font-size: 16px;\n            line-height: 26px;\n            min-height: 40px;\n        }\n\n        #calculator .result-group {\n            margin: 8px 0;\n            padding: 6px 0;\n            border-bottom: 1px dashed #eee;\n        }\n\n        #calculator .result-group:last-child {\n            border-bottom: none;\n        }\n\n        @media (max-width: 768px) {\n            #calculator input,\n            #calculator select {\n                height: 0.7rem;\n                font-size: 0.28rem;\n            }\n            #calculator label,\n            #calculator button,\n            #calculator .result-text {\n                font-size: 0.28rem;\n            }\n            #calculator .btn-group {\n                flex-direction: column;\n            }\n            #calculator button {\n                width: 100%;\n                height: 0.7rem;\n                line-height: 0.7rem;\n            }\n        }\n    <\/style>\n\n    <h3 class=\"calc-title\">\u06a9\u0631\u06cc\u0646 \u0688\u0631\u0645 \u0642\u0637\u0631 \u06a9\u06cc\u0644\u06a9\u0648\u0644\u06cc\u0679\u0631<\/h3>\n\n    <!-- Crane Type -->\n    <div class=\"calc-row\">\n        <label for=\"calculator-craneType\">\u06a9\u0631\u06cc\u0646 \u06a9\u06cc \u0642\u0633\u0645<\/label>\n        <select id=\"calculator-craneType\">\n            <option value=\"normal\">\u0627\u0648\u0648\u0631 \u06c1\u06cc\u0688 \u0633\u0641\u0631 \u06a9\u0631\u0646\u06d2 \u0648\u0627\u0644\u06cc \u06a9\u0631\u06cc\u0646\u06cc\u06ba\u06d4<\/option>\n            <option value=\"normal\">\u067e\u0648\u0631\u0679\u0644 \u06cc\u0627 \u0646\u06cc\u0645 \u067e\u0648\u0631\u0679\u0644 \u06a9\u0631\u06cc\u0646\u06cc\u06ba\u06d4<\/option>\n            <option value=\"normal\">\u067e\u0648\u0631\u0679\u0644 \u06cc\u0627 \u0646\u06cc\u0645 \u067e\u0648\u0631\u0679\u0644 \u0628\u0631\u062c \u06a9\u0631\u06cc\u0646<\/option>\n            <option value=\"normal\">\u06a9\u06cc\u0646\u0679\u06cc\u0644\u06cc\u0648\u0631 \u06a9\u0631\u06cc\u0646\u06cc\u06ba (\u0633\u062a\u0648\u0646\u060c \u062c\u06cc\u0628\u060c \u062f\u06cc\u0648\u0627\u0631 \u06cc\u0627 \u0686\u0644\u0646\u0627)<\/option>\n            <option value=\"mobile\">\u0645\u0648\u0628\u0627\u0626\u0644 \u06a9\u0631\u06cc\u0646<\/option>\n        <\/select>\n    <\/div>\n\n    <!-- Normal Crane Duty Class -->\n    <div class=\"calc-row\" id=\"calculator-normalLevelWrap\">\n        <label for=\"calculator-normalLevel\">\u0688\u06cc\u0648\u0679\u06cc \u06a9\u0644\u0627\u0633 (ISO 4301-1)<\/label>\n        <select id=\"calculator-normalLevel\">\n            <option value=\"11.2\">\u0627\u06cc\u0645 1<\/option>\n            <option value=\"12.5\">M2<\/option>\n            <option value=\"14.0\">\u0627\u06cc\u0645 3<\/option>\n            <option value=\"16.0\">M4<\/option>\n            <option value=\"18.0\">M5<\/option>\n            <option value=\"20.0\">\u0627\u06cc\u0645 6<\/option>\n            <option value=\"22.4\">M7<\/option>\n            <option value=\"25.0\">M8<\/option>\n        <\/select>\n    <\/div>\n\n    <!-- Mobile Crane Mechanism & Rope Type -->\n    <div class=\"calc-row\" id=\"calculator-mobileSelectWrap\" style=\"display: none;\">\n        <label for=\"calculator-mobileSelect\">\u0645\u06cc\u06a9\u0627\u0646\u0632\u0645 \u0627\u0648\u0631 \u0631\u0633\u06cc \u06a9\u06cc \u0642\u0633\u0645<\/label>\n        <select id=\"calculator-mobileSelect\">\n            <option value=\"lift_std\">\u0644\u0641\u0679\u0646\u06af - \u0645\u0639\u06cc\u0627\u0631\u06cc \u0631\u0633\u06cc\u06d4<\/option>\n            <option value=\"lift_anti\">\u0644\u0641\u0679\u0646\u06af - \u06af\u0631\u062f\u0634 \u0645\u0632\u0627\u062d\u0645 \u0631\u0633\u06cc<\/option>\n            <option value=\"jib_std\">\u062c\u06cc\u0628 \/ \u0644\u0641\u0646\u06af - \u0645\u0639\u06cc\u0627\u0631\u06cc \u0631\u0633\u06cc\u06d4<\/option>\n            <option value=\"jib_anti\">Jib\/Luffing - \u06af\u0631\u062f\u0634 \u0645\u0632\u0627\u062d\u0645 \u0631\u0633\u06cc\u06d4<\/option>\n        <\/select>\n    <\/div>\n\n    <!-- Rope Strand Coefficient t -->\n    <div class=\"calc-row\">\n        <label for=\"calculator-ropeT\">\u0631\u0633\u06cc \u0627\u0633\u0679\u0631\u06cc\u0646\u0688 \u06a9\u0648\u0641\u06cc\u06cc\u0646\u0679 (t)<\/label>\n        <select id=\"calculator-ropeT\">\n            <option value=\"1.25\">3 \u0627\u0633\u0679\u0631\u06cc\u0646\u0688\u0632 (t=1.25)<\/option>\n            <option value=\"1.15\">4~5 \u0627\u0633\u0679\u0631\u06cc\u0646\u0688\u0632 (t=1.15)<\/option>\n            <option value=\"1.00\">6~10 \u0627\u0633\u0679\u0631\u06cc\u0646\u0688\u0632 (t=1.00)<\/option>\n            <option value=\"0.95\">8~10 \u0633\u0679\u0631\u0646\u0688\u0632 \u067e\u0644\u0627\u0633\u0679\u06a9 \u0633\u06d2 \u0628\u06be\u0631\u06d2 \u06c1\u0648\u0626\u06d2 (t=0.95)<\/option>\n            <option value=\"1.00\">10+ Strands \u06af\u0631\u062f\u0634 \u0645\u0632\u0627\u062d\u0645 (t=1.00)<\/option>\n        <\/select>\n    <\/div>\n\n    <!-- Wire Rope Diameter d -->\n    <div class=\"calc-row\">\n        <label for=\"calculator-ropeD\">\u062a\u0627\u0631 \u06a9\u06cc \u0631\u0633\u06cc \u06a9\u0627 \u0642\u0637\u0631 d (\u0645\u0644\u06cc \u0645\u06cc\u0679\u0631)<\/label>\n        <input type=\"number\" id=\"calculator-ropeD\" placeholder=\"\u0642\u0637\u0631 \u062f\u0631\u062c \u06a9\u0631\u06cc\u06ba\u06d4\">\n        <div class=\"error-msg\" id=\"calculator-ropeD-err\">\u0628\u0631\u0627\u06c1 \u06a9\u0631\u0645 \u062f\u0631\u0633\u062a \u0642\u0637\u0631 &gt; 0 \u062f\u0631\u062c \u06a9\u0631\u06cc\u06ba\u06d4<\/div>\n    <\/div>\n\n    <!-- Operation Buttons -->\n    <div class=\"btn-group\">\n        <button id=\"calculator-btnCalc\">\u062d\u0633\u0627\u0628 \u0644\u06af\u0627\u0646\u0627<\/button>\n        <button id=\"calculator-btnReset\">\u062f\u0648\u0628\u0627\u0631\u06c1 \u062a\u0631\u062a\u06cc\u0628 \u062f\u06cc\u06ba\u06d4<\/button>\n    <\/div>\n\n    <!-- Calculation Result -->\n    <div class=\"result-wrap\">\n        <div class=\"result-text\" id=\"calculator-result\">\u0646\u062a\u06cc\u062c\u06c1 \u06cc\u06c1\u0627\u06ba \u062f\u06a9\u06be\u0627\u06cc\u0627 \u062c\u0627\u0626\u06d2 \u06af\u0627\u06d4<\/div>\n    <\/div>\n\n    <script>\n        (function() {\n            const craneType = document.getElementById('calculator-craneType');\n            const normalLevelWrap = document.getElementById('calculator-normalLevelWrap');\n            const mobileSelectWrap = document.getElementById('calculator-mobileSelectWrap');\n            const normalLevel = document.getElementById('calculator-normalLevel');\n            const mobileSelect = document.getElementById('calculator-mobileSelect');\n            const ropeT = document.getElementById('calculator-ropeT');\n            const ropeD = document.getElementById('calculator-ropeD');\n            const btnCalc = document.getElementById('calculator-btnCalc');\n            const btnReset = document.getElementById('calculator-btnReset');\n            const resultBox = document.getElementById('calculator-result');\n            const dErr = document.getElementById('calculator-ropeD-err');\n            const PREFERRED_H1 = 20;\n\n            \/\/ Switch display between crane types\n            craneType.addEventListener('change', function() {\n                if (this.value === 'mobile') {\n                    normalLevelWrap.style.display = 'none';\n                    mobileSelectWrap.style.display = 'block';\n                } else {\n                    normalLevelWrap.style.display = 'block';\n                    mobileSelectWrap.style.display = 'none';\n                }\n                resultBox.textContent = 'Result will be displayed here';\n                calculatorValidateInput();\n            });\n\n            \/\/ Input validation\n            function calculatorValidateInput() {\n                const dVal = parseFloat(ropeD.value);\n                if (isNaN(dVal) || dVal <= 0) {\n                    ropeD.classList.add('input-error');\n                    dErr.classList.add('show');\n                    return false;\n                }\n                ropeD.classList.remove('input-error');\n                dErr.classList.remove('show');\n                return true;\n            }\n\n            \/\/ Clear error while typing\n            ropeD.addEventListener('input', calculatorValidateInput);\n\n            \/\/ Core calculation logic\n            btnCalc.addEventListener('click', function() {\n                resultBox.innerHTML = '';\n                if (!calculatorValidateInput()) return;\n\n                const t = parseFloat(ropeT.value);\n                const d = parseFloat(ropeD.value);\n                const craneCat = craneType.value;\n                let standardH1 = 0;\n\n                \/\/ Non-mobile cranes\n                if (craneCat === 'normal') {\n                    standardH1 = parseFloat(normalLevel.value);\n                    const finalVal = (standardH1 * t * d).toFixed(2);\n                    resultBox.innerHTML = `\n                        <div class=\"result-group\">\n                            Minimum Drum Pitch Diameter D\u2081 \u2265 ${finalVal} mm\n                        <\/div>\n                    `;\n                }\n                \/\/ Mobile cranes\n                else {\n                    const selectVal = mobileSelect.value;\n                    switch (selectVal) {\n                        case 'lift_std':\n                            standardH1 = 16;\n                            break;\n                        case 'lift_anti':\n                            standardH1 = 18;\n                            break;\n                        case 'jib_std':\n                            standardH1 = 14;\n                            break;\n                        case 'jib_anti':\n                            standardH1 = 16;\n                            break;\n                    }\n\n                    const minValue = (standardH1 * t * d).toFixed(2);\n                    const preferredValue = (PREFERRED_H1 * t * d).toFixed(2);\n                    const isAntiRotation = selectVal.includes('_anti');\n\n                    if (!isAntiRotation) {\n                        resultBox.innerHTML = `\n                            <div class=\"result-group\">\n                                Minimum Required Value: D\u2081 \u2265 ${minValue} mm\n                            <\/div>\n                        `;\n                    } else {\n                        resultBox.innerHTML = `\n                            <div class=\"result-group\">\n                                <strong>Minimum Required Value:<\/strong><br>\n                                D\u2081 \u2265 ${minValue} mm\n                            <\/div>\n                            <div class=\"result-group\">\n                                <strong>Preferred Minimum Value (Recommended):<\/strong><br>\n                                D\u2081 \u2265 ${preferredValue} mm\n                            <\/div>\n                        `;\n                    }\n                }\n            });\n\n            \/\/ Reset all status\n            btnReset.addEventListener('click', function() {\n                craneType.selectedIndex = 0;\n                normalLevel.selectedIndex = 0;\n                mobileSelect.selectedIndex = 0;\n                ropeT.selectedIndex = 0;\n                ropeD.value = '';\n                resultBox.textContent = 'Result will be displayed here';\n                normalLevelWrap.style.display = 'block';\n                mobileSelectWrap.style.display = 'none';\n                calculatorValidateInput();\n            });\n        })();\n    <\/script>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u06a9\u0631\u06cc\u0646 \u0688\u0631\u0645 \u06a9\u0645 \u0627\u0632 \u06a9\u0645 \u0642\u0637\u0631 \u06a9\u06cc\u0644\u06a9\u0648\u0644\u06cc\u0679\u0631 \u0641\u0627\u0631\u0645\u0648\u0644\u06c1<\/h2>\n\n\n\n<p>\u0688\u06cc<sub>1<\/sub>\u2265h<sub>1<\/sub>\u00d7t\u00d7d<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0688\u06cc<sub>1<\/sub>: \u0688\u0631\u0645 \u06a9\u0627 \u06a9\u0645 \u0627\u0632 \u06a9\u0645 \u067e\u0686 \u062f\u0627\u0626\u0631\u06c1 \u0642\u0637\u0631<\/li>\n\n\n\n<li>h<sub>1<\/sub>: \u0688\u0631\u0645 \u0633\u0644\u06cc\u06a9\u0634\u0646 \u0641\u06cc\u06a9\u0679\u0631 (\u0688\u0631\u0645 \u067e\u0686 \u062f\u0627\u0626\u0631\u06d2 \u06a9\u06d2 \u0642\u0637\u0631 \u06a9\u0627 \u062a\u0646\u0627\u0633\u0628 <br>\u062a\u0627\u0631 \u06a9\u06cc \u0631\u0633\u06cc \u06a9\u0627 \u0628\u0631\u0627\u0626\u06d2 \u0646\u0627\u0645 \u0642\u0637\u0631)<\/li>\n\n\n\n<li>t: \u0679\u06cc\u0628\u0644 \u0645\u06cc\u06ba \u0645\u062e\u0635\u0648\u0635 \u062a\u0627\u0631 \u0631\u0633\u06cc \u06a9\u06cc \u0642\u0633\u0645 \u06a9\u0627 \u0639\u0646\u0635\u0631<\/li>\n\n\n\n<li>d: \u062a\u0627\u0631 \u06a9\u06cc \u0631\u0633\u06cc \u06a9\u0627 \u0628\u0631\u0627\u0626\u06d2 \u0646\u0627\u0645 \u0642\u0637\u0631 (\u0646\u0645\u0648\u0646\u06c1 \u0688\u06cc\u0679\u0627)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u0646\u0648\u0679\u0633<\/h2>\n\n\n\n<p>\u06a9\u0631\u06cc\u0646 \u06a9\u06cc \u0642\u0633\u0645 \u06a9\u06d2 \u0644\u062d\u0627\u0638 \u0633\u06d2 \u0634\u06cc\u0648 \u0627\u0648\u0631 \u0628\u06cc\u0644\u0646\u0633 \u0634\u06cc\u0648 \u06a9\u06d2 \u0627\u0646\u062a\u062e\u0627\u0628 \u06a9\u06d2 \u06af\u062a\u0627\u0646\u06a9 \u0645\u062e\u062a\u0644\u0641 \u06c1\u0648\u062a\u06d2 \u06c1\u06cc\u06ba\u060c \u0627\u0648\u0631 \u062d\u0633\u0627\u0628\u0627\u062a \u06a9\u0648 \u0645\u062e\u0635\u0648\u0635 \u062d\u0627\u0644\u0627\u062a \u06a9\u06cc \u0628\u0646\u06cc\u0627\u062f \u067e\u0631 \u0627\u0646\u062c\u0627\u0645 \u062f\u06cc\u0627 \u062c\u0627\u0646\u0627 \u0686\u0627\u06c1\u06cc\u06d2:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0639\u0627\u0645 \u06a9\u0631\u06cc\u0646\u0648\u06ba \u0627\u0648\u0631 \u0644\u06c1\u0631\u0627\u0646\u06d2 \u0645\u06cc\u06ba \u0627\u0633\u062a\u0639\u0645\u0627\u0644 \u06c1\u0648\u0646\u06d2 \u0648\u0627\u0644\u06cc \u0644\u06c1\u0631\u0627\u0626\u06cc \u0627\u0648\u0631 \u0628\u0648\u0645 \u06c1\u0648\u0633\u0679\u0646\u06af\/\u0644\u0641\u0646\u06af \u0648\u0627\u0626\u0631 \u0631\u0633\u06cc\u0648\u06ba \u06a9\u06d2 \u0644\u06cc\u06d2\u060c \u062c\u0628 \u0633\u0646\u06af\u0644 \u0644\u06cc\u0626\u0631 \u0648\u0627\u0626\u0646\u0688\u0646\u06af \u06a9\u0627 \u0627\u0633\u062a\u0639\u0645\u0627\u0644 \u06a9\u06cc\u0627 \u062c\u0627\u062a\u0627 \u06c1\u06d2 \u062a\u0648 \u0645\u0648\u0691\u0646\u06d2 \u0648\u0627\u0644\u06cc \u062a\u06be\u06a9\u0627\u0648\u0679 \u0627\u06a9\u062b\u0631 \u062a\u0627\u0631 \u0631\u0633\u06cc \u06a9\u06d2 \u0646\u0642\u0635\u0627\u0646 \u06a9\u06cc \u0628\u0646\u06cc\u0627\u062f\u06cc \u0634\u06a9\u0644 \u06c1\u0648\u062a\u06cc \u06c1\u06d2\u06d4 \u0645\u0646\u062f\u0631\u062c\u06c1 \u0628\u0627\u0644\u0627 \u06af\u062a\u0627\u0646\u06a9\u0648\u06ba \u06a9\u0648 \u062e\u0627\u0635 \u0637\u0648\u0631 \u067e\u0631 \u0631\u0633\u06cc \u06a9\u06d2 \u062f\u0627\u062e\u0644\u06d2 \u0627\u0648\u0631 \u062e\u0627\u0631\u062c\u06cc \u0639\u0644\u0627\u0642\u0648\u06ba \u0645\u06cc\u06ba \u062a\u0627\u0631 \u06a9\u06cc \u0631\u0633\u06cc \u067e\u0631 \u0631\u06cc\u0688\u06cc\u0644 \u062f\u0628\u0627\u0624 \u06a9\u0648 \u0645\u062d\u062f\u0648\u062f \u06a9\u0631\u0646\u06d2 \u06a9\u06cc \u0633\u0641\u0627\u0631\u0634 \u06a9\u06cc \u062c\u0627\u062a\u06cc \u06c1\u06d2\u06d4<\/li>\n\n\n\n<li>\u0645\u0648\u0628\u0627\u0626\u0644 \u06a9\u0631\u06cc\u0646\u0632 \u06a9\u06d2 \u0644\u06cc\u06d2\u060c 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