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Available in 23 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-23" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">23 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AC%D8%B3%D8%B1_%D8%B0%D9%88_%D9%83%D9%85%D8%B1%D8%A7%D8%AA" title="جسر ذو كمرات – Arabic" lang="ar" hreflang="ar" data-title="جسر ذو كمرات" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Bj%C3%A6lkebro" title="Bjælkebro – Danish" lang="da" hreflang="da" data-title="Bjælkebro" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Balkenbr%C3%BCcke" title="Balkenbrücke – German" lang="de" hreflang="de" data-title="Balkenbrücke" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Talasild" title="Talasild – Estonian" lang="et" hreflang="et" data-title="Talasild" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Puente_viga" title="Puente viga – Spanish" lang="es" hreflang="es" data-title="Puente viga" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Traboponto" title="Traboponto – Esperanto" lang="eo" hreflang="eo" data-title="Traboponto" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-ext mw-list-item"><a href="https://ext.wikipedia.org/wiki/Puenti_viga" title="Puenti viga – Extremaduran" lang="ext" hreflang="ext" data-title="Puenti viga" data-language-autonym="Estremeñu" data-language-local-name="Extremaduran" class="interlanguage-link-target"><span>Estremeñu</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Zubi_habedun" title="Zubi habedun – Basque" lang="eu" hreflang="eu" data-title="Zubi habedun" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Ponte_de_trabe" title="Ponte de trabe – Galician" lang="gl" hreflang="gl" data-title="Ponte de trabe" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Jembatan_balok" title="Jembatan balok – Indonesian" lang="id" hreflang="id" data-title="Jembatan balok" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Ponte_a_trave" title="Ponte a trave – Italian" lang="it" hreflang="it" data-title="Ponte a trave" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Sijinis_tiltas" title="Sijinis tiltas – Lithuanian" lang="lt" hreflang="lt" data-title="Sijinis tiltas" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Balkbrug_(brugtype)" title="Balkbrug (brugtype) – Dutch" lang="nl" hreflang="nl" data-title="Balkbrug (brugtype)" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%93%E3%83%BC%E3%83%A0%E6%A9%8B" title="ビーム橋 – Japanese" lang="ja" hreflang="ja" data-title="ビーム橋" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Bjelkebro" title="Bjelkebro – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Bjelkebro" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Bjelkebru" title="Bjelkebru – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Bjelkebru" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Beam_bridge" title="Beam bridge – Simple English" lang="en-simple" hreflang="en-simple" data-title="Beam bridge" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Palkkisilta" title="Palkkisilta – Finnish" lang="fi" hreflang="fi" data-title="Palkkisilta" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Balkbro" title="Balkbro – Swedish" lang="sv" hreflang="sv" data-title="Balkbro" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AA%E0%B8%B0%E0%B8%9E%E0%B8%B2%E0%B8%99%E0%B9%81%E0%B8%9A%E0%B8%9A%E0%B8%84%E0%B8%B2%E0%B8%99" title="สะพานแบบคาน – Thai" lang="th" hreflang="th" data-title="สะพานแบบคาน" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Kiri%C5%9F_k%C3%B6pr%C3%BC" title="Kiriş köprü – Turkish" lang="tr" hreflang="tr" data-title="Kiriş köprü" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%91%D0%B0%D0%BB%D0%BA%D0%BE%D0%B2%D0%B8%D0%B9_%D0%BC%D1%96%D1%81%D1%82" title="Балковий міст – Ukrainian" lang="uk" hreflang="uk" data-title="Балковий міст" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%A2%81%E6%A1%A5" title="梁桥 – Chinese" lang="zh" hreflang="zh" data-title="梁桥" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q158626#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul 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Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Beam+bridge%22">"Beam bridge"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Beam+bridge%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Beam+bridge%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Beam+bridge%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Beam+bridge%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Beam+bridge%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">December 2019</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444"><table class="box-Disputed plainlinks metadata ambox ambox-content ambox-disputed" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/17/System-search.svg/45px-System-search.svg.png" decoding="async" width="45" height="45" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/17/System-search.svg/68px-System-search.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/17/System-search.svg/90px-System-search.svg.png 2x" data-file-width="48" data-file-height="48" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article's <b>factual accuracy is <a href="/wiki/Wikipedia:Accuracy_dispute" title="Wikipedia:Accuracy dispute">disputed</a></b>.<span class="hide-when-compact"> Relevant discussion may be found on the <a href="/wiki/Talk:Beam_bridge#Disputed" title="Talk:Beam bridge">talk page</a>. Please help to ensure that disputed statements are <a href="/wiki/Wikipedia:Reliable_sources" title="Wikipedia:Reliable sources">reliably sourced</a>.</span> <span class="date-container"><i>(<span class="date">September 2018</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> </div> </div><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><caption class="infobox-title">Beam bridge</caption><tbody><tr><td colspan="2" class="infobox-image"><span typeof="mw:File"><a href="/wiki/File:SteamAcrossIowaRiver.JPG" class="mw-file-description" title="Multispan plate girder bridge deck on concrete piers."><img alt="Multispan plate girder bridge deck on concrete piers." src="//upload.wikimedia.org/wikipedia/commons/thumb/1/10/SteamAcrossIowaRiver.JPG/240px-SteamAcrossIowaRiver.JPG" decoding="async" width="240" height="156" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/10/SteamAcrossIowaRiver.JPG/360px-SteamAcrossIowaRiver.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/10/SteamAcrossIowaRiver.JPG/480px-SteamAcrossIowaRiver.JPG 2x" data-file-width="2000" data-file-height="1300" /></a></span><div class="infobox-caption">Multispan plate girder bridge deck on concrete piers.</div></td></tr><tr><th scope="row" class="infobox-label">Ancestor</th><td class="infobox-data"><a href="/wiki/Log_bridge" title="Log bridge">Log bridge</a></td></tr><tr><th scope="row" class="infobox-label">Descendant</th><td class="infobox-data"><a href="/wiki/Box_girder_bridge" title="Box girder bridge">Box girder bridge</a>, <a href="/wiki/Plate_girder_bridge" title="Plate girder bridge">plate girder bridge</a>, <a href="/wiki/Trestle_bridge" title="Trestle bridge">trestle bridge</a>, <a href="/wiki/Truss_bridge" title="Truss bridge">truss bridge</a><sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="please provide a reference which defines or lists siblings, descendants, and ancestors for bridge types. (January 2011)">citation needed</span></a></i>]</sup></td></tr><tr><th scope="row" class="infobox-label">Carries</th><td class="infobox-data"><a href="/wiki/Pedestrian" title="Pedestrian">Pedestrians</a>, <a href="/wiki/Automobile" class="mw-redirect" title="Automobile">automobiles</a>, <a href="/wiki/Truck" title="Truck">trucks</a>, <a href="/wiki/Light_rail" title="Light rail">light rail</a>, <a href="/wiki/Heavy_rail" class="mw-redirect" title="Heavy rail">heavy rail</a></td></tr><tr><th scope="row" class="infobox-label">Span range</th><td class="infobox-data">Short</td></tr><tr><th scope="row" class="infobox-label">Material</th><td class="infobox-data"><a href="/wiki/Timber" class="mw-redirect" title="Timber">Timber</a>, <a href="/wiki/Iron" title="Iron">iron</a>, <a href="/wiki/Steel" title="Steel">steel</a>, <a href="/wiki/Reinforced_concrete" title="Reinforced concrete">reinforced concrete</a>, <a href="/wiki/Prestressed_concrete" title="Prestressed concrete">prestressed concrete</a></td></tr><tr><th scope="row" class="infobox-label">Movable</th><td class="infobox-data">No</td></tr><tr><th scope="row" class="infobox-label">Design effort</th><td class="infobox-data">Low</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Falsework" title="Falsework">Falsework</a> required</th><td class="infobox-data">No unless cast-in-place reinforced concrete is used</td></tr></tbody></table> <p><b>Beam bridges</b> are the simplest structural forms for <a href="/wiki/Bridge_span" class="mw-redirect" title="Bridge span">bridge spans</a> supported by an <a href="/wiki/Abutment" title="Abutment">abutment</a> or <a href="/wiki/Pier_(architecture)" title="Pier (architecture)">pier</a> at each end.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> No <a href="/wiki/Bending_moment" title="Bending moment">moments</a> are transferred throughout the support, hence their structural type is known as <i><a href="/wiki/Simply_supported" class="mw-redirect" title="Simply supported">simply supported</a></i>. </p><p>The simplest beam bridge could be a log (see <a href="/wiki/Log_bridge" title="Log bridge">log bridge</a>), a <a href="/wiki/Wood_plank" class="mw-redirect" title="Wood plank">wood plank</a>, or a <a href="/wiki/Stone" class="mw-redirect" title="Stone">stone</a> <a href="https://en.wiktionary.org/wiki/slab" class="extiw" title="wiktionary:slab">slab</a> (see <a href="/wiki/Clapper_bridge" title="Clapper bridge">clapper bridge</a>) laid across a stream. Bridges designed for modern <a href="/wiki/Infrastructure" title="Infrastructure">infrastructure</a> will usually be constructed of <a href="/wiki/Steel" title="Steel">steel</a> or <a href="/wiki/Reinforced_concrete" title="Reinforced concrete">reinforced concrete</a>, or a combination of both. The concrete elements may be <a href="/wiki/Reinforced_concrete" title="Reinforced concrete">reinforced</a> or <a href="/wiki/Prestressed_concrete" title="Prestressed concrete">prestressed</a>. Such modern bridges include <a href="/wiki/Girder_bridge" title="Girder bridge">girder</a>, <a href="/wiki/Plate_girder_bridge" title="Plate girder bridge">plate girder</a>, and <a href="/wiki/Box_girder_bridge" title="Box girder bridge">box girder</a> bridges, all types of beam bridges. </p><p>Types of construction could include having many <a href="/wiki/Beam_(structure)" title="Beam (structure)">beams</a> side by side with a deck across the top of them, to a main beam either side supporting a deck between them. The main beams could be <a href="/wiki/I-beam" title="I-beam">I-beams</a>, <a href="/wiki/Truss" title="Truss">trusses</a>, or <a href="/wiki/Box_girder_bridge" title="Box girder bridge">box girders</a>. They could be <a href="/wiki/Half-through" class="mw-redirect" title="Half-through">half-through</a>, or braced across the top to create a <a href="/wiki/Through_truss" class="mw-redirect" title="Through truss">through bridge</a>. </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Passerelle_ruisseau_Moulin-Haut.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Passerelle_ruisseau_Moulin-Haut.jpg/220px-Passerelle_ruisseau_Moulin-Haut.jpg" decoding="async" width="220" height="311" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Passerelle_ruisseau_Moulin-Haut.jpg/330px-Passerelle_ruisseau_Moulin-Haut.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Passerelle_ruisseau_Moulin-Haut.jpg/440px-Passerelle_ruisseau_Moulin-Haut.jpg 2x" data-file-width="2045" data-file-height="2889" /></a><figcaption>A wooden footbridge using beams over a stream in <a href="/wiki/Dordogne" title="Dordogne">Dordogne</a>, France.</figcaption></figure> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Footbridge_over_B%C3%B6ser_Ellbach_stream,_Schwarzwald,_Germany.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Footbridge_over_B%C3%B6ser_Ellbach_stream%2C_Schwarzwald%2C_Germany.jpg/220px-Footbridge_over_B%C3%B6ser_Ellbach_stream%2C_Schwarzwald%2C_Germany.jpg" decoding="async" width="220" height="149" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Footbridge_over_B%C3%B6ser_Ellbach_stream%2C_Schwarzwald%2C_Germany.jpg/330px-Footbridge_over_B%C3%B6ser_Ellbach_stream%2C_Schwarzwald%2C_Germany.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Footbridge_over_B%C3%B6ser_Ellbach_stream%2C_Schwarzwald%2C_Germany.jpg/440px-Footbridge_over_B%C3%B6ser_Ellbach_stream%2C_Schwarzwald%2C_Germany.jpg 2x" data-file-width="5394" data-file-height="3648" /></a><figcaption>Footbridge with steel construction over Böser Ellbach stream, <a href="/wiki/Black_Forest" title="Black Forest">Black Forest</a>, Germany</figcaption></figure> <p>Because no moments are transferred, <a href="/w/index.php?title=Thrust_(statics)&action=edit&redlink=1" class="new" title="Thrust (statics) (page does not exist)">thrust</a> (as from an <a href="/wiki/Arch_bridge" title="Arch bridge">arch bridge</a>) cannot be accommodated, leading to innovative designs, such as <a href="/wiki/Lenticular_truss" class="mw-redirect" title="Lenticular truss">lenticular trusses</a> and <a href="/wiki/Bow_string_arch" class="mw-redirect" title="Bow string arch">bow string arches</a>, which contain the <a href="/wiki/Horizontal_plane" class="mw-redirect" title="Horizontal plane">horizontal</a> forces within the <a href="/wiki/Superstructure" title="Superstructure">superstructure</a>. </p><p>Beam bridges are not limited to a single <a href="/wiki/Span_(architecture)" class="mw-redirect" title="Span (architecture)">span</a>. Some <a href="/wiki/Viaduct" title="Viaduct">viaducts</a> such as the <a href="/wiki/Feiyunjiang_Bridge" title="Feiyunjiang Bridge">Feiyunjiang Bridge</a> in China have multiple simply supported spans supported by piers. This is opposed to viaducts using <a href="/wiki/Continuous_span" class="mw-redirect" title="Continuous span">continuous spans</a> over the piers. </p><p>Beam bridges are often only used for relatively short distances because, unlike truss bridges, they have no built in supports. The only supports are provided by piers. The farther apart its supports, the weaker a beam bridge gets. As a result, beam bridges rarely span more than 250 feet (80 m). This does not mean that beam bridges are not used to cross great distances; it only means that a series of beam bridges must be joined together, creating what is known as a continuous span. </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Beam_bridge&action=edit&section=1" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span></div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; 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title="Canopy bridge">Canopy</a></li> <li><a href="/wiki/Cantilever_bridge" title="Cantilever bridge">Cantilever</a></li> <li><a href="/wiki/Cantilever_spar_cable-stayed_bridge" title="Cantilever spar cable-stayed bridge">Cantilever spar cable-stayed</a></li> <li><a href="/wiki/Covered_bridge" title="Covered bridge">Covered</a></li> <li><a href="/wiki/Crib_bridge" title="Crib bridge">Crib</a></li> <li><a href="/wiki/Double-beam_drawbridge" title="Double-beam drawbridge">Double-beam drawbridge</a></li> <li><a href="/wiki/Extradosed_bridge" title="Extradosed bridge">Extradosed</a></li> <li><a href="/wiki/Jet_bridge" title="Jet bridge">Jet</a></li> <li><a href="/wiki/Log_bridge" title="Log bridge">Log</a></li> <li><a href="/wiki/Moon_bridge" title="Moon bridge">Moon</a></li> <li><a href="/wiki/Moveable_bridge" title="Moveable bridge">Moveable</a> <ul><li><a href="/wiki/Bascule_bridge" title="Bascule bridge">Bascule</a></li> <li><a href="/wiki/Drawbridge" title="Drawbridge">Drawbridge</a></li> <li><a href="/wiki/Folding_bridge" title="Folding bridge">Folding</a></li> <li><a href="/wiki/Retractable_bridge" title="Retractable bridge">Retractable</a></li> <li><a href="/wiki/The_Rolling_Bridge" title="The Rolling Bridge">Rolling</a></li> <li><a href="/wiki/Rolling_bascule_bridge" class="mw-redirect" title="Rolling bascule bridge">Rolling bascule</a></li> <li><a href="/wiki/Submersible_bridge" title="Submersible bridge">Submersible</a></li> <li><a href="/wiki/Swing_bridge" title="Swing bridge">Swing</a></li> <li><a href="/wiki/Table_bridge" title="Table bridge">Table</a></li> <li><a href="/wiki/Tilt_bridge" title="Tilt bridge">Tilt</a></li> <li><a href="/wiki/Transporter_bridge" title="Transporter bridge">Transporter</a></li> <li><a href="/wiki/Vertical-lift_bridge" title="Vertical-lift bridge">Vertical-lift</a></li></ul></li> <li><a href="/wiki/Multi-way_bridge" title="Multi-way bridge">Multi-way</a></li> <li><a href="/wiki/Navigable_aqueduct" title="Navigable aqueduct">Navigable aqueduct</a></li> <li><a href="/wiki/Pile_bridge" title="Pile bridge">Pile</a></li> <li><a href="/wiki/Pontoon_bridge" title="Pontoon bridge">Pontoon</a> <ul><li><a href="/wiki/Vlotbrug" title="Vlotbrug">Vlotbrug</a></li></ul></li> <li><a href="/wiki/Suspension_bridge" title="Suspension bridge">Suspension</a> <ul><li><a href="/wiki/Types_of_suspension_bridges" title="Types of suspension bridges">types</a></li></ul></li> <li><a href="/wiki/Timber_bridge" title="Timber bridge">Timber</a></li> <li><a href="/wiki/Through_arch_bridge" title="Through arch bridge">Through arch</a></li> <li><a href="/wiki/Trestle_bridge" title="Trestle bridge">Trestle</a></li> <li><a href="/wiki/Truss_bridge" title="Truss bridge">Truss</a></li> <li><a href="/wiki/Tubular_bridge" title="Tubular bridge">Tubular</a></li> <li><a href="/wiki/Viaduct" title="Viaduct">Viaduct</a></li> <li><i><a href="/wiki/List_of_bridge_types" title="List of bridge types">Visual index to various types</a></i></li></ul> </div></td><td class="noviewer navbox-image" rowspan="5" style="width:1px;padding:0 0 0 2px"><div><figure class="mw-halign-right" typeof="mw:File"><a href="/wiki/File:Brooklyn_Bridge_September_2021_002.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/23/Brooklyn_Bridge_September_2021_002.jpg/100px-Brooklyn_Bridge_September_2021_002.jpg" decoding="async" width="100" height="75" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/23/Brooklyn_Bridge_September_2021_002.jpg/150px-Brooklyn_Bridge_September_2021_002.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/23/Brooklyn_Bridge_September_2021_002.jpg/200px-Brooklyn_Bridge_September_2021_002.jpg 2x" data-file-width="3264" data-file-height="2448" /></a><figcaption></figcaption></figure></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lists of bridges by type</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_bridges" title="List of bridges">List of bridges</a> <ul><li><a href="/wiki/List_of_bascule_bridges" title="List of bascule bridges">bascule bridges</a></li> <li><a href="/wiki/List_of_cantilever_bridges" title="List of cantilever bridges">cantilever bridges</a></li> <li><a href="/wiki/List_of_medieval_stone_bridges_in_Germany" title="List of medieval stone bridges in Germany">medieval stone bridges in Germany</a></li> <li><a href="/wiki/List_of_multi-level_bridges" title="List of multi-level bridges">multi-level bridges</a></li> <li><a href="/wiki/List_of_road%E2%80%93rail_bridges" title="List of road–rail bridges">road–rail bridges</a></li> <li><a href="/wiki/List_of_toll_bridges" title="List of toll bridges">toll bridges</a></li> <li><a href="/wiki/List_of_vertical-lift_bridges" title="List of vertical-lift bridges">vertical-lift bridges</a></li></ul></li> <li><a href="/wiki/List_of_bridge%E2%80%93tunnels" title="List of bridge–tunnels">List of bridge–tunnels</a></li> <li><a href="/wiki/List_of_lists_of_covered_bridges_in_North_America" title="List of lists of covered bridges in North America">List of lists of covered bridges in North America</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lists of bridges by size</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_longest_bridges" title="List of longest bridges">By length</a></li> <li><a href="/wiki/List_of_longest_suspension_bridge_spans" title="List of longest suspension bridge spans">Suspension bridges</a></li> <li><a href="/wiki/List_of_longest_cable-stayed_bridge_spans" title="List of longest cable-stayed bridge spans">Cable-stayed bridges</a></li> <li><a href="/wiki/List_of_longest_cantilever_bridge_spans" title="List of longest cantilever bridge spans">Cantilever bridges</a></li> <li><a href="/wiki/List_of_longest_continuous_truss_bridge_spans" title="List of longest continuous truss bridge spans">Continuous truss bridges</a></li> <li><a href="/wiki/List_of_longest_arch_bridge_spans" title="List of longest arch bridge spans">Arch bridges</a></li> <li><a href="/wiki/List_of_longest_masonry_arch_bridge_spans" title="List of longest masonry arch bridge spans">Masonry arch bridges</a></li> <li><a href="/wiki/List_of_highest_bridges" title="List of highest bridges">Highest</a></li> <li><a href="/wiki/List_of_tallest_bridges" title="List of tallest bridges">Tallest</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Additional lists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_bridge_failures" title="List of bridge failures">Bridge failures</a></li> <li><a href="/wiki/Bridge_to_nowhere" title="Bridge to nowhere">Bridge to nowhere</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bridges_in_art" title="Bridges in art">Bridges in art</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" 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