{"id":9301,"date":"2025-12-01T09:04:28","date_gmt":"2025-12-01T09:04:28","guid":{"rendered":"https:\/\/arch.bilkent.edu.tr\/?p=9301"},"modified":"2026-02-17T13:48:55","modified_gmt":"2026-02-17T13:48:55","slug":"roof-live-loads-for-low-slope-roofs","status":"publish","type":"post","link":"https:\/\/arch.bilkent.edu.tr\/?p=9301","title":{"rendered":"Roof Live Loads for Low-Slope Roofs"},"content":{"rendered":"\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/arch.bilkent.edu.tr\/wp-content\/uploads\/2025\/12\/poster-karasu-1024x1024.jpeg\" alt=\"\" class=\"wp-image-9302\" style=\"aspect-ratio:1;object-fit:contain\" srcset=\"https:\/\/arch.bilkent.edu.tr\/wp-content\/uploads\/2025\/12\/poster-karasu-1024x1024.jpeg 1024w, https:\/\/arch.bilkent.edu.tr\/wp-content\/uploads\/2025\/12\/poster-karasu-300x300.jpeg 300w, https:\/\/arch.bilkent.edu.tr\/wp-content\/uploads\/2025\/12\/poster-karasu-150x150.jpeg 150w, https:\/\/arch.bilkent.edu.tr\/wp-content\/uploads\/2025\/12\/poster-karasu-768x768.jpeg 768w, https:\/\/arch.bilkent.edu.tr\/wp-content\/uploads\/2025\/12\/poster-karasu-1536x1536.jpeg 1536w, https:\/\/arch.bilkent.edu.tr\/wp-content\/uploads\/2025\/12\/poster-karasu.jpeg 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Efficient structural design demands qualitative understanding and statistical characterization of live loads. While live loads have been the subject of extensive study for office and residential buildings, roof live loads have seen little attention. The design of unoccupied low-slope roofs may be governed by roof live loads\u2014loads that are caused by rooftop maintenance, rooftop appurtenances, and inspection. These roof live loads are treated coarsely in national design specifications. In ASCE 7-22, they are prescribed as an equivalent uniform distributed load with no basis provided for the value. Furthermore, the source of roof live loads has never been comprehensively studied. This paper seeks to understand the root causes of roof live loads on low-slope roofs while comparing treatments around the world. As no live load model for roof live loads exists, development of a stochastic model for roof live loads began with the widely-accepted live load model for office buildings. This model is assessed for its sensitivity to the sustained load, transient load, and temporal constants. In general, the model is most sensitive to the standard deviation of the transient load. A questionnaire was developed and administered to survey building managers, engineers, and building maintenance technicians. With these results, and using the calibrated live load model, roof live loads are modeled probabilistically.<\/p>\n\n\n\n<p><strong>Biography:<\/strong><\/p>\n\n\n\n<p><strong>Dr. Adem Karasu<\/strong>\u00a0is a structural engineer specializing in seismic behavior, steel structures, and reliability-based load modeling. He earned his BSc, MSc, and PhD from Istanbul Technical University, where he focused on the seismic performance of header\u2013end plate connections. He has held postdoctoral research positions at the University of Massachusetts Amherst and EPFL, working on load models for low-slope roofs and bridges. Dr. Karasu continues to collaborate internationally on reliability-based load analysis.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-sticky is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained wp-container-1 is-position-sticky\">\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<p><strong>Date:<\/strong> 5\/12\/2025 Friday<br><strong>Time:<\/strong> 12:30-13:30<br><strong>Place:<\/strong> FFB-05<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n<div style=\"padding-top:0;padding-bottom:0;margin-top:0;margin-bottom:0\" class=\"taxonomy-category wp-block-post-terms\"><a href=\"https:\/\/arch.bilkent.edu.tr\/?cat=232\" rel=\"tag\">2025<\/a><span class=\"wp-block-post-terms__separator\">, <\/span><a href=\"https:\/\/arch.bilkent.edu.tr\/?cat=7\" rel=\"tag\">Lectures<\/a><span class=\"wp-block-post-terms__separator\">, <\/span><a href=\"https:\/\/arch.bilkent.edu.tr\/?cat=6\" rel=\"tag\">News &amp; Events<\/a><\/div>\n\n<div style=\"margin-top:0;margin-bottom:0\" class=\"taxonomy-post_tag wp-block-post-terms\"><a href=\"https:\/\/arch.bilkent.edu.tr\/?tag=building-science\" rel=\"tag\">Building Science<\/a><span class=\"wp-block-post-terms__separator\">, <\/span><a href=\"https:\/\/arch.bilkent.edu.tr\/?tag=structural-systems\" rel=\"tag\">Structural Systems<\/a><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Efficient structural design demands qualitative understanding and statistical characterization of live loads. While live loads have been the subject of extensive study for office and residential buildings, roof live loads have seen little attention. The design of unoccupied low-slope roofs may be governed by roof live loads\u2014loads that are caused by rooftop maintenance, rooftop appurtenances, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9302,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[232,7,6],"tags":[27,157],"class_list":["post-9301","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2025-year","category-lectures","category-news","tag-building-science","tag-structural-systems"],"acf":[],"_links":{"self":[{"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=\/wp\/v2\/posts\/9301","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9301"}],"version-history":[{"count":1,"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=\/wp\/v2\/posts\/9301\/revisions"}],"predecessor-version":[{"id":9303,"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=\/wp\/v2\/posts\/9301\/revisions\/9303"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=\/wp\/v2\/media\/9302"}],"wp:attachment":[{"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arch.bilkent.edu.tr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}