[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-664909-105":59,"doc-detail-664909-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","revision-precast-concrete-channel-and-drain","REVISION - PRECAST CONCRETE CHANNEL AND DRAIN","","Revision drawings and standard details for precast concrete channel and drain systems, including box culverts, U-draws, drop-inlet chambers, and sub-soil drains along expressways and arterial roads. Provides drawing references, revision dates, scales, typical sections, and dimensional tables for culvert sizing, U-drain dimensions, and reinforcement layouts. Includes notes on concrete grade, weep holes, mortar joints, reinforcement cover and laps, design assumptions (earth pressure coefficients and groundwater level), and guidance for approach slabs and rebated joints.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/revision-precast-concrete-channel-and-drain/664909/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/revision-precast-concrete-channel-and-drain/664909.png","ImageObject",300,407,{"name":92,"@type":93},"Emma Wilson","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-29",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What concrete and joint requirements are specified in the notes?","Question",{"text":112,"@type":113},"Concrete is specified by grade, and 10mm cement mortar joints are required between precast units throughout the wall thickness. Weep holes are specified to be 50mm in diameter, and precast unit length is given as 500mm.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What key design assumptions govern the drawings?",{"text":117,"@type":113},"The design references PD6694-1, uses an earth pressure coefficient at rest of 0.6, and an earth pressure coefficient of 0.2 for symmetrical loading. Ground water is assumed to be below the approach slab.",{"name":119,"@type":110,"acceptedAnswer":120},"How are reinforcement cover and laps specified?",{"text":121,"@type":113},"All concrete cover to the nearest reinforcement is specified as 50mm, and reinforcement laps are not less than 45 times the bar diameter. Steel bars may be cranked if necessary to achieve required cover.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},664909,1793278964,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":39,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":46},3848291630094,"https://eur-avatar.wpscdn.com/davatar_085a072bc5b1113ac321206ff7593b45","## DRAWING TITLE\n\nREVISIONPRECAST CONCRETE CHANNEL AND DRAINLTA/SDRE14/2/DRA1ACAST-IN-SITU BOX CULVERTLTA/SDRE14/2/DRA2PRECAST OPEN U-DRAINLTA/SDRE14/2/DRA3PRECAST SLABBED OVER U-DRAINLTA/SDRE14/2/DRA4PRECAST CONCRETE DROP-INLET CHAMBERLTA/SDRE14/2/DRA5SUB-SOIL DRAIN AND SUMP ALONG EXPRESSWAYLTA/SDRE14/2/DRA6SUB-SOIL DRAIN AND SUMP ALONG MAJOR ARTERIALLTA/SDRE14/2/DRA7  \nDRAWING NO.  \n| TYPE   | a   | b   | C   | d   | e   | f   | 9   | h   | i   |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| B1   | 60   | 305   | 305   | 75   | 205   | R455   | 65   | R75   | N.A.   |\n| B2   | 70   | 380   | 380   | 90   | 225   | R570   | 70   | R95   | N.A.   |\n| B3   | 90   | 600   | 610   | 115   | 405   | R900   | 90   | R150   | WSFR B6   |\n\nTYPE B1,B2,B3  \nSCALE 1:20  \nTYPE C7R,C7R1,C7A,C7B,C8,C8A,C8B  \nSCALE 1:20  \n## NOTES:\n\n1.Concrete shallbe of C25/30.  \n2.All weepholes shall be of 50mm diameter.  \n3.Length of precast unit shall be 500mm.  \n4.10mm cement mortar joint shall be provided between the precast unitthroughout the thickness of the wall.  \nTYPEC1  \nSCALE 1:10  \n\n| TYPE   | a   | b   | C   | d   | e   | f   | 9   | h   |  | j   | k   |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| C7R   | 50   | 810   | 495   | 75   | 280   | 300   | R155   | 115   | N.A.   | WSFR A6   | N.A.   |\n| C7R1   | 50   | 810   | 495   | 75   | 280   | 300   | R155   | 115   | N.A.   | WSFR A6   | 150   |\n| C7A   | 50   | 595   | 335   | 75   | 280   | 300   | R155   | 115   | N.A.   | N.A.   | N.A.   |\n| C7B   | 50   | 395   | 195   | 65   | 190   | 225   | R115   | 80   | N.A.   | N.A.   | N.A.   |\n| C8   | 50   | 1200   | 750   | 75   | 380   | 535   | R310   | 155   | 8R6-300   | 4R10-150   | N.A.   |\n| C8A   | 50   | 900   | 535   | 75   | 305   | 380   | R195   | 150   | 6R6-300   | 4R10-150   | N.A.   |\n| C8B   | 50   | 995   | 610   | 75   | 330   | 455   | R250   | 145   | 6R6-300   | 4R10-150   | N.A.   |\n\n| TYPE   | a   | b   | C   | d   | e   | f   | 9   |\n| --- | --- | --- | --- | --- | --- | --- | --- |\n| C2   | 35   | 230   | 20   | 65   | 40   | 150   | R120   |\n| C3   | 45   | 305   | 20   | 105   | 40   | 200   | R155   |\n| C4   | 45   | 380   | 30   | 120   | 40   | 235   | R195   |\n| C5   | 45   | 455   | 30   | 115   | 45   | 265   | R250   |\n| C5A   | 30   | 455   | 40   | 35   | 50   | 280   | R383   |\n| C6   | 45   | 535   | 30   | 120   | 50   | 360   | R315   |\n\nTYPE C2,C3,C4,C5,C5A,C6  \nSCALE 1:10  \nTYPES1  \nSCALE 1:20  \nTYPES2(CUT-OFF DRAIN)  \nSCALE 1:20  \n\n|  |  | STANDARD DETAIL   | Land Transport Authority   |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |\n|  |  | PRECAST CONCRETE  \u003Cbr>CHANNEL AND DRAIN   |  |  |  |  |\n|  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |\n|  |  |  | DRAWING NO.  \u003Cbr>LTA/SDRE14/2/DRA1   |  |  | REV.  \u003Cbr>A   |\n|  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |\n| A   | OCT 2015   |  | DATE OF ISSUE  \u003Cbr>1st APR 2014   | SCALE  \u003Cbr>AS SHOWN   | SHEET NO.  \u003Cbr>1 OF 1   |  |\n| REV.   | DATE   |  |  |  |  |  |\n\n2-1  \nREMOVEDTABLE FOR SINGLE CELL BOX CULVERT50 THK LEAN CONCRETE  \n\n| SIZE OF CULVERT  \u003Cbr>(mm)   |  | T   | REINFORCEMENT DETAILS   |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| W   | D   |  | a   | b   | C   | d   | e   | f   |\n| 600   | ≤1000   | 250   | T13-150   | T13-150   | T13-150   | T13-150   | T13-150   | T13-150   |\n| 750   | ≤1000   | 250   | T13-150   | T13-150   | T13-150   | T13-150   | T13-150   | T13-150   |\n| 1000   | ≤1500   | 250   | T13-100   | T13-100   | T13-150   | T13-150   | T13-150   | T13-150   |\n\nTYPICAL SECTION OF SINGLE CELL BOX CULVERT  \nMinimum allowable working bearing pressure of subgrade under the base slab shall be 175kKN/m²  \n## DESIGN ASSUMPTIONS:\n\n1.THE DESIGN IS BASED ON PUBLISHED DOCUMENT PD6694-1.  \n2.THE ASSUMED COEFFICENT OF EARTH PRESSURE AT REST IS 0.6.  \n3.THE ASSUMED MINIMUM EARTH PRESSURE COEFFICIENT FOR SYMMETRICAL L","cbCaiede4hp1z95g","https://ap.wps.com/l/cbCaiede4hp1z95g","pdf",1610628,"English","# NOTES\n## Design assumptions\n## Typical section and culvert sizing\n## Reinforcement and dimensions tables\n## U-drain and rebated joint details","[{\"question\":\"What concrete and joint requirements are specified in the notes?\",\"answer\":\"Concrete is specified by grade, and 10mm cement mortar joints are required between precast units throughout the wall thickness. Weep holes are specified to be 50mm in diameter, and precast unit length is given as 500mm.\"},{\"question\":\"What key design assumptions govern the drawings?\",\"answer\":\"The design references PD6694-1, uses an earth pressure coefficient at rest of 0.6, and an earth pressure coefficient of 0.2 for symmetrical loading. Ground water is assumed to be below the approach slab.\"},{\"question\":\"How are reinforcement cover and laps specified?\",\"answer\":\"All concrete cover to the nearest reinforcement is specified as 50mm, and reinforcement laps are not less than 45 times the bar diameter. Steel bars may be cranked if necessary to achieve required cover.\"}]","REVISION - PRECAST CONCRETE CHANNEL AND DRAIN | PDF"]