{"id":5418,"date":"2026-09-07T13:00:07","date_gmt":"2026-09-07T13:00:07","guid":{"rendered":"https:\/\/ultrasuonindt.it\/applications\/construction-and-infrastructure\/bridges-stay-cables-and-engineering-structures\/"},"modified":"2026-10-01T18:38:14","modified_gmt":"2026-10-01T18:38:14","slug":"bridges-stay-cables-and-engineering-structures","status":"publish","type":"page","link":"https:\/\/ultrasuonindt.it\/en\/applications\/construction-and-infrastructure\/bridges-stay-cables-and-engineering-structures\/","title":{"rendered":"Bridges, stay cables and engineering structures"},"content":{"rendered":"\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:36%\">\n<figure class=\"wp-block-image size-large has-custom-border\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"700\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?resize=700%2C700&#038;ssl=1\" alt=\"Ultrasonic measurement of bolt load on a structural connection\" class=\"wp-image-997\" style=\"border-color:#000000;border-width:1px;border-radius:15px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?w=700&amp;ssl=1 700w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:4%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<div class=\"wp-block-group has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-top-right-radius:6px;border-bottom-right-radius:6px;border-left-color:#225f78;border-left-width:6px;background-color:#ebf1f4;padding-top:24px;padding-right:28px;padding-bottom:24px;padding-left:28px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.408), 18px);font-style:italic;font-weight:400;line-height:1.6\">On a steel engineering structure the checks are three and distinct: how much material is left in the members, whether the weld beads are sound, and how hard the bolts of the connections are really pulling.<\/p>\n<\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\" style=\"padding-left:0px;line-height:1.6\">\n<li><strong style=\"color:#225f78\">\u2713<\/strong> Remaining thickness of the members measured through the paint<\/li>\n\n\n\n<li><strong style=\"color:#225f78\">\u2713<\/strong> Inspection of the weld beads with angle beam probes<\/li>\n\n\n\n<li><strong style=\"color:#225f78\">\u2713<\/strong> Measurement of the actual load of the connection bolts<\/li>\n\n\n\n<li><strong style=\"color:#225f78\">\u2713<\/strong> Readings stored and comparable between successive inspections<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">Road and railway structures work under cyclic loads for decades, in aggressive environments and often with difficult access. Knowing the real condition of the structure comes from repeatable measurements, taken at the same points years apart, not from occasional surveys. <\/p>\n\n<p class=\"wp-block-paragraph\">Thickness measurement quantifies the loss of section of the members, even through the protective coating. It is the figure that feeds the structural check: without the actual remaining thickness, the calculation rests on the design geometry, which after thirty years in service no longer describes the real structure. <\/p>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-cover is-light popmake-4066 popmake-739\" style=\"border-width:1px;min-height:250px;aspect-ratio:unset;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"250\" class=\"wp-block-cover__image-background wp-image-727 size-full\" alt=\"\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=1200%2C250&#038;ssl=1\" data-object-fit=\"cover\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?w=1200&amp;ssl=1 1200w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=300%2C63&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=1024%2C213&amp;ssl=1 1024w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=768%2C160&amp;ssl=1 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-30 has-background-dim\" style=\"background-color:#d3d6dc\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-15701bb7 wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-right has-ti-fg-color is-style-default has-luminous-vivid-amber-color has-text-color has-link-color wp-elements-1 wp-block-paragraph\" style=\"font-size:clamp(21.536px, 1.346rem + ((1vw - 3.2px) * 1.374), 35px);\"><strong>Need help choosing the right product?<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-right is-layout-flex wp-container-core-buttons-is-layout-b507c051 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button popmake-4066 popmake-739\"><a class=\"wp-block-button__link has-ti-accent-color has-cyan-bluish-gray-background-color has-text-color has-background has-link-color wp-element-button\">Contact us<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p class=\"wp-block-paragraph\">On bolted connections the ultrasonic measurement of elongation makes it possible to know the actual load of each bolt, and to recognise a loosening in progress by re-checking the same element over time. The condition is having the reference reading with the bolt unloaded, recorded at assembly. <\/p>\n\n<h2 class=\"wp-block-heading\">The checks on a steel structure<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Element<\/th><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Check carried out<\/th><\/tr><\/thead><tbody><tr><td>Beams, chords and diagonals<\/td><td>Remaining thickness, even through the paint<\/td><\/tr><tr><td>Weld beads of the joints<\/td><td>Search for cracks and lack of fusion<\/td><\/tr><tr><td>Bolted connections<\/td><td>Actual load and uniformity of tightening<\/td><\/tr><tr><td>Areas where water stagnates<\/td><td>Localised corrosion under the coating<\/td><\/tr><tr><td>Bearings and restraint areas<\/td><td>Loss of section at highly stressed points<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Repeatability over time<\/h2>\n\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:36%\">\n<figure class=\"wp-block-image size-large has-custom-border\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"1200\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?resize=1200%2C1200&#038;ssl=1\" alt=\"Thickness measurement on a metal member of a structure\" class=\"wp-image-1014\" style=\"border-color:#000000;border-width:1px;border-radius:15px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?w=1200&amp;ssl=1 1200w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?resize=768%2C768&amp;ssl=1 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:4%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<p class=\"wp-block-paragraph\">The value of an inspection on an engineering structure lies not in the single campaign but in the series. For the series to mean anything the points have to be identified in a stable way: numbered, marked and called up in the same order, so that today&#8217;s reading is comparable with the one from five years ago. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The grid files of instruments with a data logger preserve this structure, and <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/software-and-apps\/dakmaster-data-management-and-reporting\/\">DakMaster\u2122<\/a> compares the campaigns, producing the document to be attached to the structure\u2019s file.<\/p>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Recommended instruments<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Instrument<\/th><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Typical use<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-cx8-dl-thickness-gauge-with-data-logger-and-b-scan\/\">Dakota CX8-DL<\/a><\/td><td>Remaining thickness of the members with data logger<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/flaw-detectors\/dakota-fx70-dl-portable-ultrasonic-flaw-detector\/\">Dakota FX70-DL<\/a><\/td><td>Inspection of weld beads in the field<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt1-dl-portable-bolt-tension-monitor\/\">Dakota BT1-DL MiniMax<\/a><\/td><td>Measurement of the load of the connection bolts<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-multimax-remote-bolt-tension-monitoring-4-channels\/\">Dakota MultiMax<\/a><\/td><td>Continuous monitoring of connections under observation<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1757257001\"><strong class=\"schema-faq-question\">Can measurements be taken without removing the corrosion protection?<\/strong><p class=\"schema-faq-answer\">Yes, with instruments fitted with Echo-Echo mode, which exclude the coating layer and return the thickness of the steel alone.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1757257002\"><strong class=\"schema-faq-question\">Can the load of bolts already installed be known?<\/strong><p class=\"schema-faq-answer\">Only if the reference reading with the bolt unloaded was recorded at assembly and if one end of the bolt remains accessible. Without the initial reference the elongation cannot be derived. <\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1757257003\"><strong class=\"schema-faq-question\">How often should the measurements be repeated?<\/strong><p class=\"schema-faq-answer\">The interval depends on the maintenance plan of the structure and on how aggressive the environment is. What matters from the instrumental point of view is repeating the readings at the same identified points, so that the campaigns remain comparable. <\/p><\/div><\/div>\n\n<p class=\"wp-block-paragraph\">Back to <a href=\"https:\/\/ultrasuonindt.it\/en\/applications\/construction-and-infrastructure\/\">Construction and Infrastructure<\/a>, or write to us from the <a href=\"https:\/\/ultrasuonindt.it\/en\/contact\/\">Contacts<\/a> page: describe the structure and the inspection plan foreseen.<\/p>\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\">Further information and contacts <\/h5>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><a href=\"http:\/\/www.roder.it\">Systems division and sensor integration partner : www.roder.it<\/a><br\/><a href=\"https:\/\/ultrasuonindt.it\/chi-siamo\/\">More information about RODER SRL : about us<\/a><br\/>Contact for general information : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><br\/>Contact for information about these products : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><br\/>The information contained on this web page is provided for information purposes only. Although it has been compiled with the utmost care, it does not constitute a contractual offer or a binding commitment to supply. It may contain transcription, translation or typographical errors. For precise and up-to-date information, please contact our company directly.    <\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Some images on this website have been intentionally generated using Artificial Intelligence (AI). This is because, for many applications and projects, it is not possible to disclose photographs of the installation or of the actual system due to confidentiality agreements, confidentiality clauses and non-disclosure agreements (NDAs). <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>On a steel engineering structure the checks are three and distinct: how much material is left in the members, whether the weld beads are sound, and how hard the bolts of the connections are really pulling. Road and railway structures work under cyclic loads for decades, in aggressive environments and often with difficult access. Knowing [&hellip;]<\/p>\n","protected":false},"author":157040980,"featured_media":2763,"parent":3272,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"ultrasonic inspections bridges and engineering structures","_yoast_wpseo_title":"Bridges, stay cables and engineering structures | Dakota NDT","_yoast_wpseo_metadesc":"Ultrasonic inspections on bridges and engineering structures: remaining thickness of the members, checking of the welds and measurement of bolt load in the 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Inspection is one of the activities that framework requires. \u2713 Document published by the American Welding Society \u2713 Current edition: AWS D1.1\/D1.1M:2025, 23rd edition \u2713 Scope: carbon and\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT FX family ultrasonic flaw detector in field application","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni.jpeg?fit=1200%2C837&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni.jpeg?fit=1200%2C837&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni.jpeg?fit=1200%2C837&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni.jpeg?fit=1200%2C837&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni.jpeg?fit=1200%2C837&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":4768,"url":"https:\/\/ultrasuonindt.it\/en\/support\/riparazione-e-assistenza\/","url_meta":{"origin":5418,"position":5},"title":"Repair and service","author":"GSM","date":"7 September 2026","format":false,"excerpt":"RODER SRL has an in-house technical laboratory for the diagnosis and repair of Dakota NDT instruments. Every job starts with a diagnosis with quotation and ends with a final test and certified recalibration. \u2713 Technical diagnosis with fault report and quotation before proceeding \u2713 Repair in Italy for batteries, connectors,\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Hand grip accessory for Dakota NDT portable instruments","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-accessorio_impugnatura_manuale-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-accessorio_impugnatura_manuale-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-accessorio_impugnatura_manuale-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=525%2C300 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/5418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/users\/157040980"}],"replies":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/comments?post=5418"}],"version-history":[{"count":3,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/5418\/revisions"}],"predecessor-version":[{"id":8389,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/5418\/revisions\/8389"}],"up":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/3272"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/media\/2763"}],"wp:attachment":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/media?parent=5418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}