{"id":41,"date":"2013-04-03T08:43:33","date_gmt":"2013-04-03T12:43:33","guid":{"rendered":"http:\/\/firealarmsboston.com\/?page_id=41"},"modified":"2014-08-07T08:03:21","modified_gmt":"2014-08-07T12:03:21","slug":"hold-open-magnets","status":"publish","type":"page","link":"https:\/\/www.firealarmsboston.com\/?page_id=41","title":{"rendered":"Hold Open Magnets"},"content":{"rendered":"<p><strong>Hold open magnets are used to keep fire doors open until an alarm condition is detected. The fire doors are released in an alarm condition so the spread of fire can be contained.<\/strong><\/p>\n<figure id=\"attachment_254\" aria-describedby=\"caption-attachment-254\" style=\"width: 600px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg\"><img loading=\"lazy\" class=\"size-full wp-image-254\" src=\"https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?resize=600%2C600\" alt=\"Door Holder\" width=\"600\" height=\"600\" srcset=\"https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?w=600&amp;ssl=1 600w, https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?resize=270%2C270&amp;ssl=1 270w, https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?resize=90%2C90&amp;ssl=1 90w, https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?resize=135%2C135&amp;ssl=1 135w, https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?resize=192%2C192&amp;ssl=1 192w, https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/1376556318.jpg?resize=360%2C360&amp;ssl=1 360w\" sizes=\"(max-width: 600px) 100vw, 600px\" data-recalc-dims=\"1\" \/><\/a><figcaption id=\"caption-attachment-254\" class=\"wp-caption-text\">Door Holder<\/figcaption><\/figure>\n<div class=\"sharedaddy sd-sharing-enabled\"><div class=\"robots-nocontent sd-block sd-social sd-social-icon-text sd-sharing\"><h3 class=\"sd-title\">Share this:<\/h3><div class=\"sd-content\"><ul><li class=\"share-print\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-print sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41\" target=\"_blank\" title=\"Click to print\"><span>Print<\/span><\/a><\/li><li class=\"share-facebook\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-facebook-41\" class=\"share-facebook sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=facebook\" target=\"_blank\" title=\"Click to share on Facebook\"><span>Facebook<\/span><\/a><\/li><li class=\"share-linkedin\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-linkedin-41\" class=\"share-linkedin sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=linkedin\" target=\"_blank\" title=\"Click to share on LinkedIn\"><span>LinkedIn<\/span><\/a><\/li><li class=\"share-twitter\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-twitter-41\" class=\"share-twitter sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=twitter\" target=\"_blank\" title=\"Click to share on Twitter\"><span>Twitter<\/span><\/a><\/li><li class=\"share-pinterest\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-pinterest-41\" class=\"share-pinterest sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=pinterest\" target=\"_blank\" title=\"Click to share on Pinterest\"><span>Pinterest<\/span><\/a><\/li><li><a href=\"#\" class=\"sharing-anchor sd-button share-more\"><span>More<\/span><\/a><\/li><li class=\"share-end\"><\/li><\/ul><div class=\"sharing-hidden\"><div class=\"inner\" style=\"display: none;\"><ul><li class=\"share-reddit\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-reddit sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=reddit\" target=\"_blank\" title=\"Click to share on Reddit\"><span>Reddit<\/span><\/a><\/li><li class=\"share-tumblr\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-tumblr sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=tumblr\" target=\"_blank\" title=\"Click to share on Tumblr\"><span>Tumblr<\/span><\/a><\/li><li class=\"share-end\"><\/li><li class=\"share-pocket\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-pocket sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=pocket\" target=\"_blank\" title=\"Click to share on Pocket\"><span>Pocket<\/span><\/a><\/li><li class=\"share-end\"><\/li><\/ul><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Hold open magnets are used to keep fire doors open until an alarm condition is detected. The fire doors are released in an alarm condition so the spread of fire can be contained.<\/p>\n<div class=\"sharedaddy sd-sharing-enabled\"><div class=\"robots-nocontent sd-block sd-social sd-social-icon-text sd-sharing\"><h3 class=\"sd-title\">Share this:<\/h3><div class=\"sd-content\"><ul><li class=\"share-print\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-print sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41\" target=\"_blank\" title=\"Click to print\"><span>Print<\/span><\/a><\/li><li class=\"share-facebook\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-facebook-41\" class=\"share-facebook sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=facebook\" target=\"_blank\" title=\"Click to share on Facebook\"><span>Facebook<\/span><\/a><\/li><li class=\"share-linkedin\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-linkedin-41\" class=\"share-linkedin sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=linkedin\" target=\"_blank\" title=\"Click to share on LinkedIn\"><span>LinkedIn<\/span><\/a><\/li><li class=\"share-twitter\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-twitter-41\" class=\"share-twitter sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=twitter\" target=\"_blank\" title=\"Click to share on Twitter\"><span>Twitter<\/span><\/a><\/li><li class=\"share-pinterest\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-pinterest-41\" class=\"share-pinterest sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=pinterest\" target=\"_blank\" title=\"Click to share on Pinterest\"><span>Pinterest<\/span><\/a><\/li><li><a href=\"#\" class=\"sharing-anchor sd-button share-more\"><span>More<\/span><\/a><\/li><li class=\"share-end\"><\/li><\/ul><div class=\"sharing-hidden\"><div class=\"inner\" style=\"display: none;\"><ul><li class=\"share-reddit\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-reddit sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=reddit\" target=\"_blank\" title=\"Click to share on Reddit\"><span>Reddit<\/span><\/a><\/li><li class=\"share-tumblr\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-tumblr sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=tumblr\" target=\"_blank\" title=\"Click to share on Tumblr\"><span>Tumblr<\/span><\/a><\/li><li class=\"share-end\"><\/li><li class=\"share-pocket\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-pocket sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=41&amp;share=pocket\" target=\"_blank\" title=\"Click to share on Pocket\"><span>Pocket<\/span><\/a><\/li><li class=\"share-end\"><\/li><\/ul><\/div><\/div><\/div><\/div><\/div>","protected":false},"author":1,"featured_media":0,"parent":38,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"spay_email":""},"jetpack_shortlink":"https:\/\/wp.me\/P3k9h9-F","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":13,"url":"https:\/\/www.firealarmsboston.com\/?page_id=13","url_meta":{"origin":41,"position":0},"title":"Fire Alarm Systems Basics","date":"April 3, 2013","format":false,"excerpt":"Fire alarm systems are a combination of initiation devices tied into a main control panel. Any initiation device\u00a0that\u00a0activates will cause an alarm condition on the main control panel that will in turn activate notification devices, relays, and if set up, send notification of alarm to fire department via central station,\u2026","rel":"","context":"Similar post","img":{"alt_text":"Fire alarm block diagram","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/Fire_alarm_diag2.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":57,"url":"https:\/\/www.firealarmsboston.com\/?page_id=57","url_meta":{"origin":41,"position":1},"title":"Fire Alarm Control Panels","date":"April 3, 2013","format":false,"excerpt":"The fire alarm control panel is the brains of the fire alarm system. All programming of devices, zones, and actions are stored in this control panel.","rel":"","context":"Similar post","img":{"alt_text":"MS-9050UD-open","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/MS-9050UD-open.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":162,"url":"https:\/\/www.firealarmsboston.com\/?page_id=162","url_meta":{"origin":41,"position":2},"title":"The Fire Alarm System","date":"April 22, 2013","format":false,"excerpt":"Fire alarm systems are a combination of initiation devices tied into a main control panel. Any initiation device that activates will cause an alarm condition on the main control panel that will in turn activate notification devices, relays, and if set up, send notification of alarm to fire department via\u2026","rel":"","context":"Similar post","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":32,"url":"https:\/\/www.firealarmsboston.com\/?page_id=32","url_meta":{"origin":41,"position":3},"title":"Horn\/Strobes","date":"April 3, 2013","format":false,"excerpt":"Horn\/strobes are the most common notification device used in fire alarm systems. They provide audible and visual notification of an alarm condition and evacuation of the affected area(s).","rel":"","context":"Similar post","img":{"alt_text":"","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/P2R.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":34,"url":"https:\/\/www.firealarmsboston.com\/?page_id=34","url_meta":{"origin":41,"position":4},"title":"Strobes","date":"April 3, 2013","format":false,"excerpt":"Strobes are visual devices that provide notification of an alarm condition and evacuation. Strobes are usually located in restrooms and on the exterior of the building at the desinated entry for the fire dept.","rel":"","context":"Similar post","img":{"alt_text":"","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/SR.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":25,"url":"https:\/\/www.firealarmsboston.com\/?page_id=25","url_meta":{"origin":41,"position":5},"title":"Carbon Monoxide Detectors","date":"April 3, 2013","format":false,"excerpt":"Carbon monoxide detectors are used to detect rising carbon monoxide levels and initiate an alarm condition allowing occupants to evacuate and emergency response to be notified, so lives can be saved. \u00a0","rel":"","context":"Similar post","img":{"alt_text":"Carbon Monoxide Detector","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/98548528-539x480-0-0_Ademco+Ademco+Honeywell+5800CO+Wireless+Carbon+Mon.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages\/41"}],"collection":[{"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=41"}],"version-history":[{"count":3,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages\/41\/revisions"}],"predecessor-version":[{"id":255,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages\/41\/revisions\/255"}],"up":[{"embeddable":true,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages\/38"}],"wp:attachment":[{"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}