{"id":1868,"date":"2016-11-30T08:00:11","date_gmt":"2016-11-29T23:00:11","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=1868"},"modified":"2026-05-15T19:40:07","modified_gmt":"2026-05-15T10:40:07","slug":"rebar-overlap-distance-part-1","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/rebar-overlap-distance-part1\/","title":{"rendered":"Reinforcement Bar Lap Lengths and Spacing | Basics of 45D and L\/2 Offset"},"content":{"rendered":"<p>Hello, everyone.<\/p>\n<p>This is Enta.<\/p>\n<p>&nbsp;<\/p>\n<p>I was in Kagoshima until Monday.<\/p>\n<p>I arrived in Azumino City, Nagano, the other day.<\/p>\n<p><span style=\"font-size: 20px;\"><strong><span style=\"color: #0000ff;\">The temperature plummeted from around 18 degrees to -3 degrees in one go...<\/span><\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1870\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/11\/21e627ad880ff3ea50738efeab943b79.jpg\" alt=\"It&#039;s cold\" width=\"600\" height=\"450\" \/><\/p>\n<hr \/>\n<p>But that's beside the point.<\/p>\n<p>Do you remember how to lap rebar?<\/p>\n<p>&nbsp;<\/p>\n<p>That's right! Generally, 35D to 45D<\/p>\n<p>So, 34D for prefectures, cities, and towns? And 40D or so for the national government?<\/p>\n<p>In reality, I don't think 45D would be a problem, but since there's a lot of rebar waste,<\/p>\n<p>So, just make sure to carefully review the construction plan and specifications.<\/p>\n<p>&nbsp;<\/p>\n<p>Now, I\u2019ll explain the distance between overlaps when reinforcing bars are overlapped.<\/p>\n<h3>Superposition Without Problems<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1871\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/11\/8297042ba513de6c14865b5679abb447.jpg\" alt=\"Reinforcing Bar Lap 1\" width=\"600\" height=\"500\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/11\/8297042ba513de6c14865b5679abb447.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/11\/8297042ba513de6c14865b5679abb447-300x250.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><span style=\"color: #0000ff; font-size: 22px;\"><strong>L\/2<\/strong><\/span>It's just a slightly shifted version.<\/p>\n<p>For example<span style=\"color: #0000ff;\"><strong>When using D10 rebar with a 45D lap length<\/strong><\/span>...The overlap length is 450 mm.<\/p>\n<p>The distance by which the overlap with the adjacent rebar is offset is<span style=\"font-size: 20px;\"><strong><span style=\"color: #ff0000;\">45<\/span><span style=\"color: #ff0000;\">0 mm \u00f7 2 = 225 mm<\/span><\/strong><\/span>That's how it works.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1872\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/11\/d036053392d1d4efa91ceb0cc861803b.jpg\" alt=\"Reinforcing Bar Overlap 2\" width=\"600\" height=\"500\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/11\/d036053392d1d4efa91ceb0cc861803b.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/11\/d036053392d1d4efa91ceb0cc861803b-300x250.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Next, under the same conditions as above, the offset distance is<span style=\"font-size: 20px;\"><strong><span style=\"color: #ff0000;\">1.5 \u00d7 450 mm = 675 mm<\/span><\/strong><\/span><\/p>\n<p>Or<strong><span style=\"font-size: 22px; color: #0000ff;\">If it's more than that, that's fine.<\/span><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Next time, we'll look at problematic superpositions.<\/p>\n<p>&nbsp;<\/p>\n<p>See you later.<\/p>","protected":false},"excerpt":{"rendered":"<p>Hello, everyone. This is Enta.   I was in Kagoshima until Monday. I arrived in Azumino City, Nagano, the other day. The temperature dropped sharply from around 18 degrees to -3 degrees...   But anyway, do you remember how to overlap rebar? &amp;nbs\u2026<\/p>","protected":false},"author":2,"featured_media":1874,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[29],"tags":[58,60,61,63,64],"class_list":["post-1868","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-frame-spraying","tag-58","tag-60","tag-61","tag-63","tag-64"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ 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