1.0South Carolina Encyclopediahttps://www.scencyclopedia.org/sceMatthew Simmonshttps://www.scencyclopedia.org/sce/author/sceditor/rich600338<blockquote class="wp-embedded-content" data-secret="gK7aVRbqzA"><a href="https://www.scencyclopedia.org/sce/entries/earthquake-rods/">Earthquake rods</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.scencyclopedia.org/sce/entries/earthquake-rods/embed/#?secret=gK7aVRbqzA" width="600" height="338" title="“Earthquake rods” — South Carolina Encyclopedia" data-secret="gK7aVRbqzA" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> Earthquake rods are long pieces of iron several inches in diameter that are inserted through the walls of buildings to reinforce them. These rods are screwed into turnbuckles or toggles and are secured at the outside ends with large washers and nuts. Repairmen ran these rods through the walls of hundreds of buildings injured by […]