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Applicability is limited to opening heights H=375–600 and reactive soil conditions with linear shrinkage up to 8%. It provides design traffic loading references, minimum reinforcement rules under full restraint, concrete and exposure requirements, blinding concrete, surface roughening and chamfer details. It also includes guidance on base slab redesign options when bearing capacity is inadequate, and requires contraction joints where base slab length or width exceeds 20 m.",{"@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/square-single-and-multicell-box-culverts-section-4-apron-and-base-slab/649581/",{"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/square-single-and-multicell-box-culverts-section-4-apron-and-base-slab/649581.png","ImageObject",300,407,{"name":92,"@type":93},"Sophia Brooks","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-24",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 range of opening height H does the standard drawing cover?","Question",{"text":112,"@type":113},"It applies where the height of opening H is 375 to 600.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"When are dowelled contraction joints required for the base slab?",{"text":117,"@type":113},"Contraction joints are required when the base slab length and/or width exceeds 20 m, with joints located at 1/4 span points of crown units and continued across aprons.",{"name":119,"@type":110,"acceptedAnswer":120},"What soil condition limits the applicability of the standard details?",{"text":121,"@type":113},"The standard details are only applicable for reactive soils with linear shrinkage up to 8%; otherwise, specialist geotechnical design advice is required.","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},649581,1792802200,{"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":14,"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":24},962084925636,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","# TABLE OF DIMENSIONS\n\nCulvertCulvert chainageas specifiedQBase slab forskewed culvert.Refer Drawing 2Crownunits -  \n\n| Skew  \u003Cbr>angle  \u003Cbr>⑦   | Dim for Q and X for  \u003Cbr>height of opening H   |  |  |  |\n| --- | --- | --- | --- | --- |\n|  | H   | 375   | 450   | 600   |\n| 0-10   | Q   | 600   | 750   | 900   |\n| 11-20   | Q   | 600   | 750   | 900   |\n|  | X   | 650   | 800   | 000   |\n| 21-30   | Q   | 600   | 750   | 900   |\n|  | X   | 700   | 900   | 1100   |\n| 31-45   | Q   | 600   | 750   | 900   |\n|  | X   | 800   | 1000   | 1200   |\n\nBase slabHolding down anchors,  \nreinforcementminimum number =1.Refer Drawing 2 for Detailsand Installation Notes —Lean mix infill,InvertSpanrefer Detail31-12F·1-12A·Starter bars atends of headwall-eHeadwallLmit of bose slobApron.Refer Note 6-Base referencefor surface finish andDrawing 2 for details135pointL1-12A  g         \n12A along skew with eachCut off wall.Apron reinforcementmesh layer.Refer Section ARefer Drawing 2一on Drowing 2TYPICAL PLAN-HIGH SKEW DRAWNMULTICELL BOX CULVERT SHOWNSKEWED SINGLE AND SLAB LINK BOX CULVERTS SIMILAR  \n# SQUARE SINGLE AND MULTICELL BOX CULVERTS SIMILAR\n\nTYPICAL ELEVATION-SPANNING SLAB DETAILS  \n## TYPICAL ELEVATION-MULTICELL DETAILS\n\n# GENERAL ARRANGEMENT-MULTIPLE CELL RC BOX CULVERT\n\nGENERAL ARRANGEMENT-SLAB LINK BOX CULVERT  \n250  \n25 chamfer  \nHeadwall  \n7不  \n(250)  \n9  \n◎  \n200  \n米  \n12 dia bars  \nto suit skew,  \nrefer PLANS  \nRefer drawing 2  \nfor dowel and  \nBox culvert  \nreinforcement details-  \ncrown unit  \nLimit of  \nApron.Refer Note 6  \nbase slab  \nfor surface finish-  \nCulvert invert  \nBase slab  \n④  \nN  \nmin  \n600  \nThis face shall-  \nbe coated with  \n50 blinding concrete  \nSECTIONDTYPICAL DETAILSFOR APRON ATDETAIL③END OF HEADWALL  \nbitumen  \nCut off wall  \nZ  \n④  \n## TYPICAL DETAILS FOR\n\nA-(  \n# SECTION4\n\nAPRON AND BASE SLAB  \n\n| The purpose of this Standard Drawing is to provide typical standard details  \u003Cbr>that shall be used within the limtations specified n the drawing and in  \u003Cbr>accordance with the following:  \u003Cbr>1.The adaptability of the standard details shll be assessed by the project  \u003Cbr>designer n respect of specific project geometric,appropriate foundation  \u003Cbr>and scour conditions.  \u003Cbr>2.In reactive soils:this standard drawing s only applicable for reactive soils  \u003Cbr>with linear shrinkage up to 8%.Specialist geotechnical design advice shall  \u003Cbr>be sought otherwise.  \u003Cbr>3.If the insitu bearing capacity is inadequate,the following options may be  \u003Cbr>explored subject to review and acceptance by E&T Structures and  \u003Cbr>Geotechnical sections:  \u003Cbr>a.Insitu ground improvemen,and/or  \u003Cbr>b.Redesign of the base slab.  \u003Cbr>Any redesign works shall be RPEQ certified by appropriate engineering  \u003Cbr>disciplines for compliance.  \u003Cbr>4.When there is uncertainty regarding the application of the standard details  \u003Cbr>on this drawing for a specific project,advice shall be sought from E&T  \u003Cbr>Structures.   |\n| --- |\n\n## GENERAL NOTES:\n\n1.SCOPE:This drowing is to detail cast insitu base slab,aprons and headwalls forprecast R C Box Culverts and Slab Link Box Culverts where H(height of opening)=375 to 600.This drawing supersedes Standard Drawings 1174 and 1317.This drawing does not provide details of fish passage requirements.Where projectspecific environmental assessment determines that waterway barrier works arerequired,additional details shall be developed and included in the project drawings.  \n2.BOX CULVERTS shall be constructed in accordance with MRTSO3.  \n3.DESIGN TRAFFIC LOADING:HLP400,M1600,A160 and W80 are in accordance withAS 5100.2.  \nMaximum height of illover he culvert shall be 2000.Maximum design pressure(Ea)under the culvert slab bases are provided in theBase Slab Details and Dimensions table on drawing 2.  \n4.DOWELLED CONTRACTION JOINTS shall be provided where (a)the length and/or (b)thewidth of the base slab exceed 20m.When contraction joints are required across thewidth,they shall be located at 1/4 span points of crown units","cbCaidhGnGF94GYd","https://ap.wps.com/l/cbCaidhGnGF94GYd","pdf",557361,"English","# GENERAL ARRANGEMENT-MULTIPLE CELL RC BOX CULVERT\n## GENERAL ARRANGEMENT-SLAB LINK BOX CULVERT\n# TYPICAL DETAILS FOR APRON AND BASE SLAB\n## GENERAL NOTES:\n## SECTION A-(\n# SECTIONDTYPICAL DETAILSFOR APRON ATDETAIL③END OF HEADWALL","[{\"question\":\"What range of opening height H does the standard drawing cover?\",\"answer\":\"It applies where the height of opening H is 375 to 600.\"},{\"question\":\"When are dowelled contraction joints required for the base slab?\",\"answer\":\"Contraction joints are required when the base slab length and/or width exceeds 20 m, with joints located at 1/4 span points of crown units and continued across aprons.\"},{\"question\":\"What soil condition limits the applicability of the standard details?\",\"answer\":\"The standard details are only applicable for reactive soils with linear shrinkage up to 8%; otherwise, specialist geotechnical design advice is required.\"}]","SQUARE SINGLE AND MULTICELL BOX CULVERTS - SECTION 4 - APRON AND BASE SLAB | PDF"]