{"id":100006,"date":"2026-02-15T20:05:41","date_gmt":"2026-02-15T20:05:41","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100006"},"modified":"2026-02-15T20:05:41","modified_gmt":"2026-02-15T20:05:41","slug":"anchor-bolt-load","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/nb\/calculators\/anchor-bolt-load\/","title":{"rendered":"Ankerboltens interaksjon | Spenning + Skj\u00e6r | Gratis verkt\u00f8y"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Anchor Bolt Combined Load Calculator\",\"description\":\"Anchor bolt combined tension+shear interaction check. (T\/T_allow)^5\/3 + (V\/V_allow)^5\/3 \u2264 1.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/anchor-bolt-load\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the 5\/3 exponent?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The 5\/3 power interaction per ACI 318 is less conservative than linear (1.0) but accounts for actual failure modes under combined loading.\"}},{\"@type\":\"Question\",\"name\":\"When to use linear interaction?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Some codes require linear interaction (T\/Ta + V\/Va \u2264 1.2) which is more conservative.\"}},{\"@type\":\"Question\",\"name\":\"What if only tension acts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Set V=0. The check becomes T\/Ta \u2264 1.0.\"}},{\"@type\":\"Question\",\"name\":\"How to get allowable values?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"From anchor manufacturer data or calculated per ACI 318 using concrete breakout\/steel capacity.\"}},{\"@type\":\"Question\",\"name\":\"What about prying action?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Prying can increase actual bolt tension significantly. Account for it in the applied T value.\"}}]}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Anchor Bolt Combined Load Calculator\",\"item\":\"https:\/\/vibromera.eu\/calculators\/anchor-bolt-load\/\"}]}<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" 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.15s}.vc-faq-q:hover{background:#ede9e3}.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform .25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}.vc-faq-a{max-height:0;overflow:hidden;transition:max-height .35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}.vc-faq-a-inner{padding:14px 16px;border-top:1px solid var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all .15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background .15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}<\/style>\n\n<div class=\"vc-calculator\"><header class=\"vc-header\"><p class=\"vc-header-eyebrow\">Free Engineering Tool #224<\/p><h1 class=\"vc-header-title\">Anchor Bolt Combined Load Calculator<\/h1><p class=\"vc-header-subtitle\">Check anchor bolt under combined tension and shear. Uses interaction formula per ACI 318.<\/p><div class=\"vc-badges\"><span class=\"vc-badge\">(T\/T\u2090)^\u2075\u2044\u2083 + (V\/V\u2090)^\u2075\u2044\u2083 \u2264 1<\/span><span class=\"vc-badge\">ACI 318<\/span><span class=\"vc-badge\">Auto-Calc<\/span><\/div><\/header>\n<div class=\"vc-card\"><form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\"><div class=\"vc-form-grid\"><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-t\">Applied Tension (T) <span class=\"vc-label-hint\">(kN)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-t\" step=\"any\" value=\"15\" ><\/div><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-ta\">Allowable Tension (T\u2090) <span class=\"vc-label-hint\">(kN)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-ta\" step=\"any\" value=\"40\" ><\/div><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-v\">Applied Shear (V) <span class=\"vc-label-hint\">(kN)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-v\" step=\"any\" value=\"10\" ><\/div><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-va\">Allowable Shear (V\u2090) <span class=\"vc-label-hint\">(kN)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-va\" step=\"any\" value=\"30\" ><\/div><\/div>\n<div class=\"vc-presets\"><div class=\"vc-presets-label\">Quick presets<\/div><button type=\"button\" class=\"vc-preset-btn\" data-t=\"15\" data-ta=\"40\" data-v=\"10\" data-va=\"30\">Light: T=15, V=10<\/button><button type=\"button\" class=\"vc-preset-btn\" data-t=\"30\" data-ta=\"40\" data-v=\"20\" data-va=\"30\">Heavy: T=30, V=20<\/button><button type=\"button\" class=\"vc-preset-btn\" data-t=\"5\" data-ta=\"40\" data-v=\"25\" data-va=\"30\">Shear dominant<\/button><\/div><\/form>\n<div class=\"vc-results\" id=\"vc-results\"><div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Results<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy<\/button><\/div><div class=\"vc-result-grid\"><div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Interaction Ratio<\/div><div class=\"vc-rcard-value\" id=\"vc-r-ir\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Tension Utilization<\/div><div class=\"vc-rcard-value\" id=\"vc-r-tu\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Shear Utilization<\/div><div class=\"vc-rcard-value\" id=\"vc-r-su\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Status<\/div><div class=\"vc-rcard-value\" id=\"vc-r-status\">\u2014<\/div><\/div><\/div><\/div><\/div>\n<div class=\"vc-section vc-open\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory &amp; Formulas<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\"><h3>Interaction Formula<\/h3><div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div><p>If the interaction ratio \u2264 1.0, the anchor is adequate. Values > 1.0 indicate overload.<\/p><\/div><\/div><\/div>\n<div class=\"vc-section\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\"><a class=\"vc-related-link\" href=\"\/calculators\/anchor-bolt-calculator\/\">Anchor Bolt Pullout<\/a><a class=\"vc-related-link\" href=\"\/calculators\/machine-foundation-mass\/\">Foundation Mass<\/a><\/div><\/div><\/div><\/div>\n<div class=\"vc-section\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\"><div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>What is the 5\/3 exponent?<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\"><p>The 5\/3 power interaction per ACI 318 is less conservative than linear (1.0) but accounts for actual failure modes under combined loading.<\/p><\/div><\/div><\/div><div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>When to use linear interaction?<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\"><p>Some codes require linear interaction (T\/Ta + V\/Va \u2264 1.2) which is more conservative.<\/p><\/div><\/div><\/div><div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>What if only tension acts?<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\"><p>Set V=0. The check becomes T\/Ta \u2264 1.0.<\/p><\/div><\/div><\/div><div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>How to get allowable values?<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\"><p>From anchor manufacturer data or calculated per ACI 318 using concrete breakout\/steel capacity.<\/p><\/div><\/div><\/div><div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>What about prying action?<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\"><p>Prying can increase actual bolt tension significantly. 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