{"id":104269,"date":"2024-02-02T20:05:43","date_gmt":"2024-02-03T01:05:43","guid":{"rendered":"https:\/\/sjcivil.com\/?p=104269"},"modified":"2024-02-12T04:57:23","modified_gmt":"2024-02-12T09:57:23","slug":"common-rebar-inspection-fails","status":"publish","type":"post","link":"https:\/\/sjcivil.com\/common-rebar-inspection-fails\/","title":{"rendered":"Common Rebar Inspection Fails"},"content":{"rendered":"[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;section&#8221; _builder_version=&#8221;4.16&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_row admin_label=&#8221;row&#8221; _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.24.0&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]\n<p><b>Executive Summary. <\/b><span style=\"font-weight: 400;\">\u00a0Learn here the what-not-to-dos of rebar installation.\u00a0 Some photos of fails here will certainly affect your pour schedule \u2013 and they\u2019re so easy to avoid with conscientious workers and timely inspection.<\/span><\/p>\n<p><iframe title=\"Spotify Embed: Common Rebar Inspection Fails\" style=\"border-radius: 12px\" width=\"100%\" height=\"152\" frameborder=\"0\" allowfullscreen allow=\"autoplay; clipboard-write; encrypted-media; fullscreen; picture-in-picture\" loading=\"lazy\" src=\"https:\/\/open.spotify.com\/embed\/episode\/2nk9larAkXNQMiQy2UBlNP?si=FHeIC03vTBKNmFgqOZ0jQQ&#038;utm_source=oembed\"><\/iframe><\/p>\n<p><b>The basic fails.\u00a0 <\/b><span style=\"font-weight: 400;\">What rodbusters do is pretty impressive. Not only is the bar heavy (it\u2019s solid steel), but it has to be arranged in perfect geometric patterns.\u00a0 Here are the top problems I see in rebar installation (from an inspector\u2019s viewpoint):<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Clearance<\/span><span style=\"font-weight: 400;\"> \u2013 rebar is designed to be so many inches away from the surface of the concrete for two main reasons:\u00a0 (1) to properly serve its structural purpose and (2) to prevent corrosion of the bar from water or chemical intrusion.\u00a0 Assuming you\u2019ve formed to the correct concrete dimensions, you then have to make sure the rebar has proper clearance from those surfaces, as listed below:<\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Top<\/span><span style=\"font-weight: 400;\"> \u2013 on smaller pours this can be eyeballed into place.\u00a0 On larger and more critical pours (warehouse slabs or bridge decks) it may take stringlines, finishing machines, and lasers to ensure proper clearance from the finished surface.\u00a0\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Bottom<\/span><span style=\"font-weight: 400;\"> \u2013 it\u2019s all about dobies here.\u00a0 Whatever blocks or chairs you choose, ensure that the surface you\u2019re putting them on will not deflect thereby allowing the rebar to \u2018settle\u2019 and be too close to the subgrade in between the supports.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Sides<\/span><span style=\"font-weight: 400;\"> \u2013 again, bolsters and chairs properly spaced do the trick and make for easy inspection.\u00a0 These spacing tools ensure a fixed, premeasured offset of the bar from the formed surface.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tie wire housekeeping<\/span><span style=\"font-weight: 400;\"> \u2013 there are two issues here.\u00a0 The first is just picking up all those small pieces of tie wire that are left behind during the tying process.\u00a0 Blow them out, remove them by hand, or use a rolling magnet.\u00a0 Second is the tie wire left in place which infringes upon the clearance as discussed in the previous bullet.\u00a0 Lots of times the tie wire pushes against the side form during the pour and then upon stripping of the forms the wire is at the surface and can rust and\/or provide a conduit for water intrusion.\u00a0 This is a simple fix during the installation \u2013 just push back the wire away from the final surface.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Trash in the forms<\/span><span style=\"font-weight: 400;\"> \u2013 this is a \u2018pride of work\u2019 thing and a dirty pour area says to an inspector that \u2018if the rodbusters are fine with leaving all that trash in the forms, the bar must be all screwed up \u2013 I\u2019ll start looking harder.\u2019<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Spacing<\/span><span style=\"font-weight: 400;\"> \u2013 thirty-one bars at 8\u201d spacing isn\u2019t going to be perfect, but across the 20\u2019 it spans, it ought to at least have the right number of bars in place and look good to the naked eye.\u00a0 Read the plans, ensure the spacing is understood, and expect some spot measuring by the inspector.\u00a0 If it looks good, you\u2019re probably going to be ok with the inspector.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li aria-level=\"1\"><span style=\"font-weight: 400;\">Tie requirements<\/span><span style=\"font-weight: 400;\"> \u2013 most specifications will require a percentage of ties.\u00a0 In other words, 50% tied or 100% tied, et cetera.\u00a0 This is a count of the intersections of all the bars and what percentage of those intersections are required to be tied.<\/span><\/li>\n<\/ul>\n<p><b><\/b><b>I\u2019m from Missouri.<\/b><span style=\"font-weight: 400;\">\u00a0 <\/span><b>Show me.<\/b><span style=\"font-weight: 400;\">\u00a0 Below are some what-not-to-do sample photos which help illustrate the items discussed above.<br \/><\/span><\/p>\n<table style=\"height: 2556px; width: 680px;\">\n<tbody>\n<tr style=\"height: 257px;\">\n<td style=\"width: 417.237px; height: 257px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104270 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-1-300x257.png\" alt=\"\" width=\"215\" height=\"184\" srcset=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-1-300x257.png 300w, https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-1.png 427w\" sizes=\"(max-width: 215px) 100vw, 215px\" \/><\/td>\n<td style=\"width: 249.163px; height: 257px;\">\n<p><span style=\"font-weight: 400;\">REBAR CLEARANCE (SIDE)\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">TOP VIEW INTO WALL FORMS<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Grey rebar spacer (wheel) is in place which is good, but rebar hook comes in above it into the supposed clear zone.<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 250px;\">\n<td style=\"width: 417.237px; height: 250px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104271 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-b-240x300.png\" alt=\"\" width=\"193\" height=\"241\" srcset=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-b-240x300.png 240w, https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-b.png 343w\" sizes=\"(max-width: 193px) 100vw, 193px\" \/><\/td>\n<td style=\"width: 249.163px; height: 250px;\">\n<p><span style=\"font-weight: 400;\">REBAR CLEARANCE (BOTTOM)\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">TOP VIEW OF SLAB BOTTOM MAT<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This \u201cdobie tower\u201d, indicated by the red arrow, seems like a bad practice.\u00a0 This tower can collapse during a pour and shift the rebar.\u00a0 I never found a specification it violated though.<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 274px;\">\n<td style=\"width: 417.237px; height: 274px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104272 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-c-300x241.png\" alt=\"\" width=\"260\" height=\"209\" \/><\/td>\n<td style=\"width: 249.163px; height: 274px;\">\n<p><span style=\"font-weight: 400;\">REBAR CLEARANCE (BOTTOM)\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">CLOSE VIEW OF SLAB BOTTOM MAT<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This wrinkled plastic piece is a \u201csand plate\u201d which is supposed to prevent settlement of the dobie into the subgrade.\u00a0 The rebar was too heavy and the rebar mat sank.\u00a0<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 274px;\">\n<td style=\"width: 417.237px; height: 274px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104273 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-d-300x253.png\" alt=\"\" width=\"267\" height=\"225\" \/><\/td>\n<td style=\"width: 249.163px; height: 274px;\">\n<p><span style=\"font-weight: 400;\">TRASH IN FORMS<\/span><\/p>\n<p><span style=\"font-weight: 400;\">TOP VIEW INTO SLAB ON GRADE POUR<\/span><\/p>\n<p><span style=\"font-weight: 400;\">There should be no trash\/rubbish in the pour area.\u00a0 Notice tie wire, random sand plate, and paper.\u00a0 Trash can be removed by hand or even blown out by air compressor.<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 298px;\">\n<td style=\"width: 417.237px; height: 298px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104274 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-e-247x300.png\" alt=\"\" width=\"221\" height=\"268\" srcset=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-e-247x300.png 247w, https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-e.png 421w\" sizes=\"(max-width: 221px) 100vw, 221px\" \/><\/td>\n<td style=\"width: 249.163px; height: 298px;\">\n<p><span style=\"font-weight: 400;\">REBAR SPACING\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">ELEVATION VIEW INTO WALL FORMS<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Rebar is not at correct spacing.\u00a0 Frankly, this is probably not completely tied yet; however, we may have been called in for an inspection and, well, it\u2019s not spaced correctly.\u00a0 No tape measure needed!<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 226px;\">\n<td style=\"width: 417.237px; height: 226px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104275 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-f-300x195.png\" alt=\"\" width=\"282\" height=\"183\" \/><\/td>\n<td style=\"width: 249.163px; height: 226px;\">\n<p><span style=\"font-weight: 400;\">REBAR SPACING\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">SIDE VIEW OF TOP SLAB<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Spacing between top and bottom mat is too large.\u00a0 Either standees were misfabricated or bottom mat dobies had settled into the subgrade.<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 250px;\">\n<td style=\"width: 417.237px; height: 250px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104276 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-g-300x227.png\" alt=\"\" width=\"280\" height=\"212\" \/><\/td>\n<td style=\"width: 249.163px; height: 250px;\">\n<p><span style=\"font-weight: 400;\">REBAR CLEARANCE\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">TIE WIRE IS TOO CLOSE TO FINAL SURFACE<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tie wire will be at the concrete surface once the forms are stripped and will not only corrode, but will provide a path for water intrusion.<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 274px;\">\n<td style=\"width: 417.237px; height: 274px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104277 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-h-300x261.png\" alt=\"\" width=\"283\" height=\"246\" \/><\/td>\n<td style=\"width: 249.163px; height: 274px;\">\n<p><span style=\"font-weight: 400;\">FORMWORK AND REBAR ERECTION\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">FRONT VIEW OF WALL FORM<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Nails will be exposed once this wall form is stripped.\u00a0 This will rust and allow water to enter the concrete wall and cause spalling or cracking of the concrete.<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 203px;\">\n<td style=\"width: 417.237px; height: 203px;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-104278\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-i-291x300.png\" alt=\"\" width=\"243\" height=\"251\" \/><\/td>\n<td style=\"width: 249.163px; height: 203px;\">\n<p><span style=\"font-weight: 400;\">REBAR CLEARANCE\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">EDGE OR WALL FORM<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Although there\u2019s no measurement, the grey slab bolster behind the red arrow shows the required clearance.\u00a0\u00a0<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height: 250px;\">\n<td style=\"width: 417.237px; height: 250px;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-104279 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-j-300x237.png\" alt=\"\" width=\"258\" height=\"204\" \/><\/td>\n<td style=\"width: 249.163px; height: 250px;\">\n<p><span style=\"font-weight: 400;\">REBAR TWISTING\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">COLUMN REBAR IN COLUMN FORM<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Rebar was not properly aligned in prior pour, and the bar continued vertically in a twisted manner.\u00a0 Also notice this resulted in a clearance issue in lower right at front form face.<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><b>My story.<\/b><span style=\"font-weight: 400;\">\u00a0 It would take a couple days to prepare each of the bridge deck pours earlier in my career because we had to run the finishing machine over and over the surface.\u00a0 That\u2019s just what it took.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">These photos above are all preventable mistakes that shouldn\u2019t need an inspector to catch.\u00a0 These are issues that can be caught by the rodbuster, or certainly the internal quality control team of the general contractor.\u00a0 When an inspector gets called to the field by the contractor and finds these mistakes over and over, it is very frustrating to both parties:\u00a0 the contractor and the owner.\u00a0 I love to see high production and schedules met and beat.\u00a0 Having to reject installations is a morale killer.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Work safe!<\/span><\/p>\n<div class=\"su-button-center\"><a href=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/2023.12.29-Rebar-Inspection.pdf\" class=\"su-button su-button-style-flat\" style=\"color:#FFFFFF;background-color:#293a57;border-color:#212f46;border-radius:12px;-moz-border-radius:12px;-webkit-border-radius:12px\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"color:#FFFFFF;padding:0px 30px;font-size:22px;line-height:44px;border-color:#6a768a;border-radius:12px;-moz-border-radius:12px;-webkit-border-radius:12px;text-shadow:none;-moz-text-shadow:none;-webkit-text-shadow:none\"> Download The PDF<\/span><\/a><\/div>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]\n<span class=\"et_bloom_bottom_trigger\"><\/span>","protected":false},"excerpt":{"rendered":"<p>Executive Summary. \u00a0Learn here the what-not-to-dos of rebar installation.\u00a0 Some photos of fails here will certainly affect your pour schedule \u2013 and they\u2019re so easy to avoid with conscientious workers and timely inspection. https:\/\/open.spotify.com\/episode\/2nk9larAkXNQMiQy2UBlNP?si=FHeIC03vTBKNmFgqOZ0jQQ The basic fails.\u00a0 What rodbusters do is pretty impressive. Not only is the bar heavy (it\u2019s solid steel), but it has [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":104274,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"<b>Executive Summary. <\/b><span style=\"font-weight: 400;\">\u00a0Learn here the what-not-to-dos of rebar installation.\u00a0 Some photos of fails here will certainly affect your pour schedule \u2013 and they\u2019re so easy to avoid with conscientious workers and timely inspection.<\/span>\r\n\r\nhttps:\/\/open.spotify.com\/episode\/2nk9larAkXNQMiQy2UBlNP?si=FHeIC03vTBKNmFgqOZ0jQQ\r\n\r\n<b>The basic fails.\u00a0 <\/b><span style=\"font-weight: 400;\">What rodbusters do is pretty impressive. Not only is the bar heavy (it\u2019s solid steel), but it has to be arranged in perfect geometric patterns.\u00a0 Here are the top problems I see in rebar installation (from an inspector\u2019s viewpoint):<\/span>\r\n<ul>\r\n \t<li style=\"list-style-type: none;\">\r\n<ul>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Clearance<\/span><span style=\"font-weight: 400;\"> \u2013 rebar is designed to be so many inches away from the surface of the concrete for two main reasons:\u00a0 (1) to properly serve its structural purpose and (2) to prevent corrosion of the bar from water or chemical intrusion.\u00a0 Assuming you\u2019ve formed to the correct concrete dimensions, you then have to make sure the rebar has proper clearance from those surfaces, as listed below:<\/span>\r\n<ul>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Top<\/span><span style=\"font-weight: 400;\"> \u2013 on smaller pours this can be eyeballed into place.\u00a0 On larger and more critical pours (warehouse slabs or bridge decks) it may take stringlines, finishing machines, and lasers to ensure proper clearance from the finished surface.\u00a0\u00a0<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Bottom<\/span><span style=\"font-weight: 400;\"> \u2013 it\u2019s all about dobies here.\u00a0 Whatever blocks or chairs you choose, ensure that the surface you\u2019re putting them on will not deflect thereby allowing the rebar to \u2018settle\u2019 and be too close to the subgrade in between the supports.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Sides<\/span><span style=\"font-weight: 400;\"> \u2013 again, bolsters and chairs properly spaced do the trick and make for easy inspection.\u00a0 These spacing tools ensure a fixed, premeasured offset of the bar from the formed surface.<\/span><\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tie wire housekeeping<\/span><span style=\"font-weight: 400;\"> \u2013 there are two issues here.\u00a0 The first is just picking up all those small pieces of tie wire that are left behind during the tying process.\u00a0 Blow them out, remove them by hand, or use a rolling magnet.\u00a0 Second is the tie wire left in place which infringes upon the clearance as discussed in the previous bullet.\u00a0 Lots of times the tie wire pushes against the side form during the pour and then upon stripping of the forms the wire is at the surface and can rust and\/or provide a conduit for water intrusion.\u00a0 This is a simple fix during the installation \u2013 just push back the wire away from the final surface.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Trash in the forms<\/span><span style=\"font-weight: 400;\"> \u2013 this is a \u2018pride of work\u2019 thing and a dirty pour area says to an inspector that \u2018if the rodbusters are fine with leaving all that trash in the forms, the bar must be all screwed up \u2013 I\u2019ll start looking harder.\u2019<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Spacing<\/span><span style=\"font-weight: 400;\"> \u2013 thirty-one bars at 8\u201d spacing isn\u2019t going to be perfect, but across the 20\u2019 it spans, it ought to at least have the right number of bars in place and look good to the naked eye.\u00a0 Read the plans, ensure the spacing is understood, and expect some spot measuring by the inspector.\u00a0 If it looks good, you\u2019re probably going to be ok with the inspector.<\/span><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<ul>\r\n \t<li aria-level=\"1\"><span style=\"font-weight: 400;\">Tie requirements<\/span><span style=\"font-weight: 400;\"> \u2013 most specifications will require a percentage of ties.\u00a0 In other words, 50% tied or 100% tied, et cetera.\u00a0 This is a count of the intersections of all the bars and what percentage of those intersections are required to be tied.<\/span><\/li>\r\n<\/ul>\r\n<b><\/b><b>I\u2019m from Missouri.<\/b><span style=\"font-weight: 400;\">\u00a0 <\/span><b>Show me.<\/b><span style=\"font-weight: 400;\">\u00a0 Below are some what-not-to-do sample photos which help illustrate the items discussed above.\r\n<\/span>\r\n<table style=\"width: 680px; height: 2556px;\">\r\n<tbody>\r\n<tr style=\"height: 257px;\">\r\n<td style=\"width: 417.237px; height: 257px;\"><img class=\" wp-image-104270 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-1-300x257.png\" alt=\"\" width=\"215\" height=\"184\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 257px;\"><span style=\"font-weight: 400;\">REBAR CLEARANCE (SIDE)\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">TOP VIEW INTO WALL FORMS<\/span>\r\n\r\n<span style=\"font-weight: 400;\">Grey rebar spacer (wheel) is in place which is good, but rebar hook comes in above it into the supposed clear zone.<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 250px;\">\r\n<td style=\"width: 417.237px; height: 250px;\"><img class=\" wp-image-104271 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-b-240x300.png\" alt=\"\" width=\"193\" height=\"241\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 250px;\"><span style=\"font-weight: 400;\">REBAR CLEARANCE (BOTTOM)\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">TOP VIEW OF SLAB BOTTOM MAT<\/span>\r\n\r\n<span style=\"font-weight: 400;\">This \u201cdobie tower\u201d, indicated by the red arrow, seems like a bad practice.\u00a0 This tower can collapse during a pour and shift the rebar.\u00a0 I never found a specification it violated though.<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 274px;\">\r\n<td style=\"width: 417.237px; height: 274px;\"><img class=\" wp-image-104272 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-c-300x241.png\" alt=\"\" width=\"260\" height=\"209\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 274px;\"><span style=\"font-weight: 400;\">REBAR CLEARANCE (BOTTOM)\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">CLOSE VIEW OF SLAB BOTTOM MAT<\/span>\r\n\r\n<span style=\"font-weight: 400;\">This wrinkled plastic piece is a \u201csand plate\u201d which is supposed to prevent settlement of the dobie into the subgrade.\u00a0 The rebar was too heavy and the rebar mat sank.\u00a0<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 274px;\">\r\n<td style=\"width: 417.237px; height: 274px;\"><img class=\" wp-image-104273 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-d-300x253.png\" alt=\"\" width=\"267\" height=\"225\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 274px;\"><span style=\"font-weight: 400;\">TRASH IN FORMS<\/span>\r\n\r\n<span style=\"font-weight: 400;\">TOP VIEW INTO SLAB ON GRADE POUR<\/span>\r\n\r\n<span style=\"font-weight: 400;\">There should be no trash\/rubbish in the pour area.\u00a0 Notice tie wire, random sand plate, and paper.\u00a0 Trash can be removed by hand or even blown out by air compressor.<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 298px;\">\r\n<td style=\"width: 417.237px; height: 298px;\"><img class=\" wp-image-104274 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-e-247x300.png\" alt=\"\" width=\"221\" height=\"268\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 298px;\"><span style=\"font-weight: 400;\">REBAR SPACING\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">ELEVATION VIEW INTO WALL FORMS<\/span>\r\n\r\n<span style=\"font-weight: 400;\">Rebar is not at correct spacing.\u00a0 Frankly, this is probably not completely tied yet; however, we may have been called in for an inspection and, well, it\u2019s not spaced correctly.\u00a0 No tape measure needed!<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 226px;\">\r\n<td style=\"width: 417.237px; height: 226px;\"><img class=\" wp-image-104275 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-f-300x195.png\" alt=\"\" width=\"282\" height=\"183\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 226px;\"><span style=\"font-weight: 400;\">REBAR SPACING\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">SIDE VIEW OF TOP SLAB<\/span>\r\n\r\n<span style=\"font-weight: 400;\">Spacing between top and bottom mat is too large.\u00a0 Either standees were misfabricated or bottom mat dobies had settled into the subgrade.<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 250px;\">\r\n<td style=\"width: 417.237px; height: 250px;\"><img class=\" wp-image-104276 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-g-300x227.png\" alt=\"\" width=\"280\" height=\"212\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 250px;\"><span style=\"font-weight: 400;\">REBAR CLEARANCE\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">TIE WIRE IS TOO CLOSE TO FINAL SURFACE<\/span>\r\n\r\n<span style=\"font-weight: 400;\">Tie wire will be at the concrete surface once the forms are stripped and will not only corrode, but will provide a path for water intrusion.<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 274px;\">\r\n<td style=\"width: 417.237px; height: 274px;\"><img class=\" wp-image-104277 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-h-300x261.png\" alt=\"\" width=\"283\" height=\"246\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 274px;\"><span style=\"font-weight: 400;\">FORMWORK AND REBAR ERECTION\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">FRONT VIEW OF WALL FORM<\/span>\r\n\r\n<span style=\"font-weight: 400;\">Nails will be exposed once this wall form is stripped.\u00a0 This will rust and allow water to enter the concrete wall and cause spalling or cracking of the concrete.<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 203px;\">\r\n<td style=\"width: 417.237px; height: 203px;\"><img class=\"alignnone  wp-image-104278\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-i-291x300.png\" alt=\"\" width=\"243\" height=\"251\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 203px;\"><span style=\"font-weight: 400;\">REBAR CLEARANCE\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">EDGE OR WALL FORM<\/span>\r\n\r\n<span style=\"font-weight: 400;\">Although there\u2019s no measurement, the grey slab bolster behind the red arrow shows the required clearance.\u00a0\u00a0<\/span><\/td>\r\n<\/tr>\r\n<tr style=\"height: 250px;\">\r\n<td style=\"width: 417.237px; height: 250px;\"><img class=\" wp-image-104279 aligncenter\" src=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/Rebar-j-300x237.png\" alt=\"\" width=\"258\" height=\"204\" \/><\/td>\r\n<td style=\"width: 249.163px; height: 250px;\"><span style=\"font-weight: 400;\">REBAR TWISTING\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">COLUMN REBAR IN COLUMN FORM<\/span>\r\n\r\n<span style=\"font-weight: 400;\">Rebar was not properly aligned in prior pour, and the bar continued vertically in a twisted manner.\u00a0 Also notice this resulted in a clearance issue in lower right at front form face.<\/span><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<b>My story.<\/b><span style=\"font-weight: 400;\">\u00a0 It would take a couple days to prepare each of the bridge deck pours earlier in my career because we had to run the finishing machine over and over the surface.\u00a0 That\u2019s just what it took.\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">These photos above are all preventable mistakes that shouldn\u2019t need an inspector to catch.\u00a0 These are issues that can be caught by the rodbuster, or certainly the internal quality control team of the general contractor.\u00a0 When an inspector gets called to the field by the contractor and finds these mistakes over and over, it is very frustrating to both parties:\u00a0 the contractor and the owner.\u00a0 I love to see high production and schedules met and beat.\u00a0 Having to reject installations is a morale killer.<\/span>\r\n\r\n<span style=\"font-weight: 400;\">Work safe!<\/span>\r\n\r\n[su_button url=\"https:\/\/sjcivil.com\/wp-content\/uploads\/2024\/02\/2023.12.29-Rebar-Inspection.pdf\" target=\"blank\" style=\"flat\" background=\"#293a57\" size=\"10\" center=\"yes\"]Download The PDF[\/su_button]","_et_gb_content_width":"","iawp_total_views":71,"footnotes":""},"categories":[16],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Common Rebar Inspection Fails<\/title>\n<meta name=\"description\" content=\"Learn what-not-to-dos of rebar installation. 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