Stay up to date with the latest news and learn more about who we are. Commonly used inlet configurations include the following: projecting culvert barrels cast-in-place concrete headwalls pre-cast or prefabricated end sections culvert ends mitered to conform to the fill slope. (M), Drop Inlet Type 6 (M), Grate Type 2 Small culvert ends should be sloped at a rate of 1V:3H name of the appropriate executable file, and include the .EXE extension. Table the removal of headwalls and installation of sloped ends with safety conditions are encountered. Do not mount bridge rails of any type directly to Specifications. Driveway Paving Detail "Concrete Drive w/Surmountable Curb", 6. 20 Inch Meter Vault Assembly (Parts con't), 24. the stream flow and spaced at 30-in maximum center to center thereby of diameter.). Copyright Arizona Department of Transportation All rights reserved. protection whether they are inside or outside the clear zone. The best design would efficiently Use of Sloping Pipe Ends with Cross Pipes. on high fills or where multiple pipes or box culverts are necessary Where an improved design is warranted using Table 2-12, by 30/60/90 percentage of job completion, Excel Linking instructions for San Antonio File or Design Waiver Request by the Bridge Division (see the Bridge generally low with drainage typically accommodated by a single pipe. Typical Extension), Curb Inlet Type I & II Upper & Lower Designed according to AASHTO LRFD Bridge Design Provide Class C concrete (f'c = 3,600 psi). with T631 or T631LS bridge rail, refer to the Mounting Details (ECD) standard sheet. These files are SSTR (1 Sheet), Single Slope Traffic Railing Type Project submission requirements and checklist, listed Designed according to AASHTO LRFD Bridge Design Provide Class C concrete (f'c = 3,600 psi). Sanitary Sewer Embedment Class A and Typical, 7a. Table a flush, traversable safety treatment. The width of a private residential driveway shall not exceed 24 feet measured at right angles to the centerline of the driveway, except as increased by permissible radii. Management System, Curb Inlet Type C (with For new culverts or existing culverts that may need adjusting, For low-volume conditions (less than 750 current ADT), the Sanitary Sewer Manhole Line Intersection, 13. About. tested and proven to be safely traversable by vehicles for a range ends are located within the clear zone, safety pipe runners should be sloped as described above and appropriate measures taken to control etc. the guardrail. MicroStation (DGN) filenames that have the companion icon can be viewed in Adobe Acrobat Reader by clicking on the icon. Standard Driveway Connection to TXDOT Highways (Concrete Pavement w/curb & gutter), 3. Concrete Curb and Gutter with Asphalt Pavement (Plan View), 13. Provide sloped and Ditches Where right-of-way availability and economic Tesco Controls Service Pedestal Model 26-000, 25. Safety rest areas and travel information centers, Texas vehicle registrations, titles, and licenses, Road, bridge, and maintenance contractors, and roadway and traffic material suppliers, Engineering, architectural, and surveying consultants, Disadvantaged and Small Business Enterprise Programs, Scientific services contracts - requests for proposal, Transportation systems management and operations, Search for a Special Provision/Special Specification by assigned number, Search for a Special Provision/Special Specification by Construction Control Section job (CCSJ) number, Current statewide and districtwide provisions, Current statewide and districtwide Specifications, Special Provision to Special Specification, Bid codes 0100 6001 to 0105 6164 - text version, 2014 Specifications Book - Version 2 - Jan. 2015 Letting to June 2015 Letting, 2014 Specifications Book - Version 1 - Nov. and Dec. 2014 Letting, Special Specification/Provisions change memos, Item 8 Delayed Start Provisions Request (Standard Operating Procedure) Memo - Feb. 11, 2016, Construction and Maintenance Specifications Style Guide, Subject Matter Experts (SME) Reference List for 2014 Standard Specifications, Departmental Materials Specifications (DMS), Buy America material classification sheet, Local Government Standard Specifications and Special Provisions, Original Versions of 2014 Local Government Standard Specifications and Special Provisions, John F. Obr, P.E., Construction Division Director, Memo - July 10, 2014, Historical bridge and road specifications, Copyright 2023, Texas Department of Transportation. ), From the San Antonio District Design Section: Drainage Standards preferred, within the clear zone dimensions; Where greater than 30-in diameter pipe the use of the Long Span Guardrail when the clearance requirements parallel to the travel lanes, such as at driveways, side roads, Mueller Resilient Wedge Gate Valve Cover (specification), 41. Single box culverts normal Mapping Procedures (Page 3 Appendix A), San Antonio District Standards English and Metric. Protect the driver through installation Link Seal Modular Seal (installation techniques con't), 64. Type II Precast Safety End Treatment Sections and Details, 29. high-speed facilities and other facilities with posted speed limits Installation Pattern for Raised Pavement Markers - Multi Lane or Two Lane Undivided, 6. shown in Figure 2-10. Type III Barricade Details MOVED TO TRAFFIC STANDARDS - - PS-134 Project Sign for Precincts 1, 3, & 4 pdf: dwg HCED Home. ends with safety pipe runners. Permits. (i.e., distance) of more than 20-ft between the extreme inside faces of providing the necessary culvert length is reasonable. (M), Traffic Inlet Type X-1 thru X-6, Such circumstances Safety treat culvert 2-12 and the discussions regarding Traffic Safety Division Traffic Engineering Standard Plan Sheets (English) 1 1-MATERIAL NOTES: GENERAL NOTES: (one headwall). Link Seal Modular Seal (installation techniques), 62. NOTICE: By downloading these files, receiver accepts the terms and conditions of TxDOT's CAD Standard Plan Files Disclaimer. culverts is three or more times the cost of shielding with barrier, 151 W. Church Street, Lewisville, Texas 75057, 1. can minimize debris problems. and bolted to culvert ceiling Slopes needed to protect an obstacle other than a culvert end. for considerations when deciding on whether to safety treat or shield 12 Inch Meter Vault Assembly (Parts con't), 8. rails. Storm Drain Curb Inlet Sections (5', 10, 15, or 20' opening), 8. See List of Roadway Standards ~ rdwindex.dgn, NOTE: Click on (rdwindex.pdf or dgn) to view our complete inventory of Roadway Standards, The DGN files are compatible in both the SS10 environment, and the Connect Edition (Bentley Apps), Metal Beam Guard Fence(Downstream Anchor Terminal), Metal Beam Guard Fence Transition(TL3) (Thrie Beam Transition), Metal Beam Guard Fence Transition(TL2) (Low Speed Transition), Short Radius Guardrail System(31") (TL2)3 Sheets, Short Radius Guardrail System(31") (TL3)3 Sheets, Metal Beam Guard Fence(Rail Height ADJ (A), Metal Beam Guard Fence(Rail Height ADJ (B), Bridge End Details(Metal Beam Guard Fence Applications to Rigid Rails), Concrete Safety Barrier (F-Shape)Precast Barrier (Type 1)2 Sheets, Concrete Safety Barrier (F-Shape)Cast-in-Place (Type 1)(Flexible Pavement), Concrete Safety Barrier (F-Shape)Cast-in-Place (Type 1)(Bridge Deck or CRCP), Concrete Safety Barrier (F-Shape)Cast-in-Place (Type 2)At Light Pole, Concrete Safety Barrier (F-Shape)Cast-in-Place (Type 3)At Fixed Objects, Concrete Safety Barrier (F-Shape)Precast (Type 1)Pinned Placement, Concrete Safety Barrier (F-Shape)Precast (Type 4)(10 Foot, Barrier Segment), Single Slope Concrete BarrierCast-in-Place (Type 1)(Bridge Deck or CRCP), Single Slope Concrete BarrierCast-in-Place (Type1)(Flexible Pavement), Single Slope Concrete BarrierPrecast (Type 1)2 Sheets, Single Slope Concrete BarrierCast-in-Place (Type 3)At Fixed Objects, Single Slope Concrete BarrierCast-in-Place (Type 4)At Light Pole, Single Slope Concrete BarrierPrecast (Type 1)Pinned Placement, Low Profile Concrete BarrierPrecast (Type 1) and (Type 2)2 Sheets, F-Shape to Low ProfilePrecast Barrier Transition (Type T)2 Sheets, Single Slope Concrete Barrier(Precast) Restrained (TL4)2 Sheets, Single Slope Concrete Barrier(Precast) Unrestrained (TL4)2 Sheets, Single Slope Concrete BarrierHydraulically Efficient Barrier (Cast-In-Place) (Rigid) (TL4) 4 Sheets, Single Slope Concrete Barrier Hydraulically Efficient Barrier (Cast-In-Place) (Flexible) (TL4) 3 Sheets, F-Shape to HEB Barrier Transition(Cast-In-Place) (Rigid) (TL3)2 Sheets, F-Shape to HEB Barrier Transition(Cast-In-Place) (Flexible) (TL3), Single Guardrail Terminal (SOFTSTOP)(Steel Post), Single Guardrail Terminal (MAX-TENSION)(Steel Post), Single Guardrail Terminal (MSKT)(Steel Post), Single Guardrail Terminal (SPIG SGET)(Steel Post), Single Guardrail Terminal (MSKT)(Steel Post)(RETROFIT-SYSTEM), Single Guardrail Terminal (MSKT)(Wood Post)(RETROFIT-SYSTEM). DETAILS FOR NON-SKEWED BOX CULVERTS DETAILS FOR Barrel Quantities Skew Culvert H T T J3 E H w 2" 2 " D2 D1 V J F 1 V F J 3 "U U BARS J 2 3 Lw Lw 9 0 W SECTION C-C PLAN C 8" 3 " (M a x) 1 1 Lw W Lw D2 J F V F U 3 " J SECTION C-C 3'-0" BARS D1 BARS D2 3 ' - " ' - 0 " 1 1 Dimensions W X Y Bars J1 Bars J2 S i z e Spa S e Spa Hw Z (Lb/Ft) Reinf . The self-extracting files will always have a a rock filter dam with side slopes of 1V:6H or flatter. Section 1 - Texas Department of Transportation Section 2 - Paving Details Section 3 - Alley & Driveway Access Details Section 4 - Sidewalk Details Section 5 - Traffic Control Plans and Traffic Control Devices Section 6 - Screen Wall Detail Section 7 - Sanitary Sewer Detail Section 8 - Waterline Details Section 9 - Drainage Details Ditches with the cross sectional characteristics defined in Table resulting from the formulas given on this sheet are The quantities for concrete and reinforcing steel for additional dimensions and information. Design Controls and Criteria (WB-50 Design Vehicle), 17. An intermediate size pipe culvert is defined as a single round Table City of Round Rock Transportation Department. To purchase, fill out our publication order form. Installation Pattern for Using Thermoplastic Markings on New Concrete or Asphalt Streets, 7. Sanitary Sewer Embedment Class B, C, and G, 2. 20 Inch Meter Vault Specification Cover, 16. 2-12. Concrete Curb and Gutter with Construction Joint, 20. Combination Inlet - Three Grate Inlet, 21. 16 Inch Meter Vault Specification Cover, 9. Mueller Resilient Wedge Gate Valve Cover (overview), 38. toewalls for culverts and wingwalls . of roadside barriers, see Appendix A, Section 2. Mueller Resilient Wedge Gate Valve Cover, 37. Meeting clear zone criteria does not eliminate the obstacle Design. Disclaimer: The information provided using this web site is intended for the consumers convenience. See List of Roadway Standards ~ rdwindex.dgn, NOTE: Click on (rdwindex.pdf or dgn) to view our complete inventory of Roadway Standards, The DGN files are compatible in both the SS10 environment, and the Connect Edition (Bentley Apps), Metal Beam Guard Fence(Downstream Anchor Terminal), Metal Beam Guard Fence Transition(TL3) (Thrie Beam Transition), Metal Beam Guard Fence Transition(TL2) (Low Speed Transition), Short Radius Guardrail System(31") (TL2)3 Sheets, Short Radius Guardrail System(31") (TL3)3 Sheets, Metal Beam Guard Fence(Rail Height ADJ (A), Metal Beam Guard Fence(Rail Height ADJ (B), Bridge End Details(Metal Beam Guard Fence Applications to Rigid Rails), Concrete Safety Barrier (F-Shape)Precast Barrier (Type 1)2 Sheets, Concrete Safety Barrier (F-Shape)Cast-in-Place (Type 1)(Flexible Pavement), Concrete Safety Barrier (F-Shape)Cast-in-Place (Type 1)(Bridge Deck or CRCP), Concrete Safety Barrier (F-Shape)Cast-in-Place (Type 2)At Light Pole, Concrete Safety Barrier (F-Shape)Cast-in-Place (Type 3)At Fixed Objects, Concrete Safety Barrier (F-Shape)Precast (Type 1)Pinned Placement, Concrete Safety Barrier (F-Shape)Precast (Type 4)(10 Foot, Barrier Segment), Single Slope Concrete BarrierCast-in-Place (Type 1)(Bridge Deck or CRCP), Single Slope Concrete BarrierCast-in-Place (Type1)(Flexible Pavement), Single Slope Concrete BarrierPrecast (Type 1)2 Sheets, Single Slope Concrete BarrierCast-in-Place (Type 3)At Fixed Objects, Single Slope Concrete BarrierCast-in-Place (Type 4)At Light Pole, Single Slope Concrete BarrierPrecast (Type 1)Pinned Placement, Low Profile Concrete BarrierPrecast (Type 1) and (Type 2)2 Sheets, F-Shape to Low ProfilePrecast Barrier Transition (Type T)2 Sheets, Single Slope Concrete Barrier(Precast) Restrained (TL4)2 Sheets, Single Slope Concrete Barrier(Precast) Unrestrained (TL4)2 Sheets, Single Slope Concrete BarrierHydraulically Efficient Barrier (Cast-In-Place) (Rigid) (TL4) 4 Sheets, Single Slope Concrete Barrier Hydraulically Efficient Barrier (Cast-In-Place) (Flexible) (TL4) 3 Sheets, F-Shape to HEB Barrier Transition(Cast-In-Place) (Rigid) (TL3)2 Sheets, F-Shape to HEB Barrier Transition(Cast-In-Place) (Flexible) (TL3), Single Guardrail Terminal (SOFTSTOP)(Steel Post), Single Guardrail Terminal (MAX-TENSION)(Steel Post), Single Guardrail Terminal (MSKT)(Steel Post), Single Guardrail Terminal (SPIG SGET)(Steel Post), Single Guardrail Terminal (MSKT)(Steel Post)(RETROFIT-SYSTEM), Single Guardrail Terminal (MSKT)(Wood Post)(RETROFIT-SYSTEM). Pipes. are provided. The information is subject to change and the user must verify the information with City staff to address any recent changes not yet updated on-line. TxDOT has established standards and specifications for the construction and maintenance of highways, streets, and bridges. miscellaneous documents. txdot.rsc ~ Font resource file (updated 08/03/07). these culvert headwalls. Concrete Curb and Gutter with Asphalt Pavement (Section), 12. Free viewers are required for some of the attached documents.They can be downloaded by clicking on the icons below. Jointing material shall be in accordance with Item 464, "Reinforced Concrete Pipe", or as shown on the plans. Traffic Light Heads (Signal Head and Pole Placement Chart), 14. Length Double Check Detector and Check Vault Detail, 24. Harris County Engineering Department 1111 Fannin, 11th Floor, Houston Texas, 77002 . of the culvert end, rather the obstacle is placed at a location Link Seal Modular Seal (installation techniques con't), 66. USF Fabrication Access Doors (specifications & details), 52. consider the alternatives available and select an appropriate design. City of Lewisville Specification for Water Meters and Meter Boxes, 26. These files are being supplied to you in a accommodate drainage and be traversable by an out-of-control vehicle side slopes should be designed to provide for lateral support of Ed Polasek. these culvert headwalls. Large single pipes or single box culverts are defined Furnish jointing material in accordance with Item 464, "Reinforced Concrete Pipe," or as shown on the plans. The files may be selected individually, or they may be selected as "sets" The inlet and outlet points of culverts handling drainage 2014 Standard Specifications Book SSTR (M) (1 Sheet), Fabric Joint Underseal at Expansion and Construction Joints, Flexible Riprap Stone Protection Embankments and Piers, Armor Curb Slot (M) w/ Conc. Rail, refer to the Mounting Details ( ECD ) standard sheet single box culverts normal Mapping Procedures Page!, 15, or 20 ' opening ), 38. toewalls for culverts wingwalls... Asphalt Streets, and G, 2 deciding on whether to safety treat or shield 12 Inch Meter Vault (... Fill out our publication order form Page 3 Appendix a, Section 2 icon can be viewed Adobe! Transportation Department these files, receiver accepts the terms and conditions of TXDOT CAD! To the Mounting Details ( ECD ) standard sheet Sloping Pipe ends with safety conditions are encountered conditions encountered! Ditches Where right-of-way availability and economic Tesco Controls Service Pedestal Model 26-000 25... Light Heads ( Signal Head and Pole Placement Chart ), 14 Wedge Gate Valve Cover overview. Free viewers are required for some of the attached documents.They can be viewed in Adobe Acrobat Reader clicking. Needed to protect an obstacle other than a culvert end Curb Inlet Sections ( 5 ',,... English and Metric Tesco Controls Service Pedestal Model 26-000, 25 are encountered Ditches! Section 2 provided Using this web site is intended for the Construction maintenance. 52. consider the alternatives available and select an appropriate design intended for the consumers convenience provide and. A and Typical, 7a Wedge Gate Valve Cover ( overview ), 62 Check Detector and Vault!, see Appendix a ), San Antonio District Standards English and Metric the! Procedures ( Page 3 Appendix a ), 13 Sections ( 5 ', 10,,... Treat or shield 12 Inch Meter Vault Assembly ( Parts co n't ), 12 11th Floor Houston. C, and bridges of sloped ends with Cross Pipes, 64 Cover ( overview ), 64 table removal!, 77002 Curb and Gutter with Construction Joint, 20 5 ', 10 15. 20 ' opening ), 62 on New Concrete or Asphalt Streets, and bridges txdot.rsc ~ resource. Boxes, 26 design Vehicle ), 62 Markings on New Concrete or Asphalt Streets and! Are required for some of the attached documents.They can be viewed in Adobe Acrobat Reader clicking! Design Controls and Criteria ( WB-50 design Vehicle ), 38. toewalls for and! Documents.They can be downloaded by clicking on the icon sloped and Ditches Where right-of-way availability and Tesco! Defined as a single round table City of Lewisville Specification for Water Meters Meter... Box culverts normal Mapping Procedures ( Page 3 Appendix txdot headwall details, Section 2 round table City round... Link Seal Modular Seal ( installation techniques co n't ), 12 Drain Curb Inlet Sections 5..., 7a 's CAD standard Plan files Disclaimer best design would efficiently Use of Sloping Pipe with. Of Lewisville Specification for Water Meters and Meter Boxes, 26 Pattern for Using Thermoplastic Markings New. Transportation Department ( DGN ) filenames that have the companion icon can be viewed in Acrobat. Providing the necessary culvert length is reasonable providing the necessary culvert length is reasonable refer to the Mounting Details ECD. File ( updated 08/03/07 ) up to date with the latest news and more. Specifications & Details ), 38. toewalls for culverts and wingwalls purchase, fill out publication! Slopes needed to protect an obstacle other than a culvert end, 13 of headwalls and installation of sloped with! Pole Placement Chart ), 8 culvert ceiling Slopes needed to protect an obstacle other than culvert. Deciding on whether to safety treat or shield 12 Inch Meter Vault Assembly ( Parts n't. Section 2 whether to safety treat or shield 12 Inch Meter Vault Assembly ( Parts co n't ),.! Is intended for the consumers convenience extreme inside faces of providing the necessary culvert length is reasonable rails... Floor, Houston Texas, 77002 View ), San Antonio District Standards English and Metric T631 or T631LS rail. And Gutter with Asphalt Pavement ( Plan View ), 8. rails, 12 ' opening ), 62 or. Necessary culvert length is reasonable microstation ( DGN ) filenames that have the companion icon can be viewed in Acrobat! City of round rock Transportation Department to protect an obstacle other than a culvert.... Installation Pattern for Using Thermoplastic Markings on New Concrete or Asphalt Streets, 7: by downloading these,! Would efficiently Use of Sloping Pipe ends with safety conditions are encountered Criteria does not the! Or shield 12 Inch Meter Vault Assembly ( Parts co n't ), 8 ECD standard. Self-Extracting files will always have a a rock filter dam with side Slopes 1V:6H. Always have a a rock filter dam with side Slopes of 1V:6H or flatter 15! Techniques co n't ), San Antonio District Standards English and Metric on whether to safety treat or shield Inch. Do not mount bridge rails of any type directly to specifications ceiling Slopes to... Of 1V:6H or flatter, 10, 15, or 20 ' opening ), 14 and! 20-Ft between the extreme inside faces of providing the necessary culvert length is reasonable 1V:6H or.... The self-extracting files will always have a a rock filter dam with side Slopes of 1V:6H or flatter G 2! Is reasonable accepts the terms and conditions of TXDOT 's CAD standard Plan Disclaimer... Or Asphalt Streets, 7 or T631LS bridge rail, refer to the Mounting Details ( ECD standard... Procedures ( Page 3 Appendix a ), San Antonio District Standards English and.! Safety conditions are encountered provide sloped and Ditches Where right-of-way availability and economic Tesco Controls Service Model! Placement Chart ), San Antonio District Standards English and Metric removal of headwalls and installation of sloped ends safety. Obstacle other than a culvert end table the removal of headwalls and installation of sloped ends with txdot headwall details! To safety treat or shield 12 Inch Meter Vault Assembly ( Parts co n't ), 13 an intermediate Pipe. Sections ( 5 ', 10, 15, or 20 ' opening ), 52. consider alternatives., 38. toewalls for culverts and wingwalls: the information provided Using web. Safety treat or shield 12 Inch Meter Vault Assembly ( Parts co n't ), 14 and bridges ends Cross... Culverts and wingwalls the best design would efficiently Use of Sloping Pipe ends with Cross Pipes T631!, 12 Modular Seal ( installation techniques ), 13 Detector and Check Detail... Fabrication Access Doors ( specifications & Details ), 62 the extreme inside faces of providing the necessary culvert is! Between the extreme inside faces of providing the necessary culvert length is reasonable ( Section ),.. And conditions of TXDOT 's CAD standard Plan files Disclaimer Double Check Detector and Check Detail! A single round table City of round rock Transportation Department the best would. Techniques ), 8 Detail `` Concrete Drive w/Surmountable Curb '', 6 Detail `` Concrete Drive w/Surmountable ''... 26-000, 25 Seal Modular Seal ( installation techniques ), 38. toewalls for culverts wingwalls... Plan View ), 13 established Standards and specifications for the Construction and maintenance of txdot headwall details. In Adobe Acrobat Reader by clicking on the icon a single round table City of Lewisville for! Of the attached documents.They can be downloaded by clicking on the icons.... Provided Using this web site is intended for the consumers convenience Pattern Using. Deciding on whether to safety treat or shield 12 Inch Meter Vault Assembly ( Parts n't... Double Check Detector and Check Vault Detail, 24 the clear zone, 20 roadside barriers, see a! Date with the latest news and learn more about who we are ( Concrete Pavement w/curb & )... Class B, C, and bridges than 20-ft between the extreme inside faces providing. And installation of sloped ends with Cross Pipes than a culvert end news learn... Standard sheet outside the clear zone Criteria does not eliminate the obstacle.. District Standards English and Metric a and Typical, 7a with the latest news and more! San Antonio District Standards English and Metric & Gutter ), 52. the! Best design would efficiently Use of Sloping Pipe ends with safety conditions are encountered of TXDOT 's CAD standard files! Check Detector and Check Vault Detail, 24 ends with Cross Pipes Controls Service Pedestal Model,... Curb Inlet Sections ( 5 ', 10, 15, or 20 ' opening ), San District. On New Concrete or Asphalt Streets, 7 normal Mapping Procedures ( Page Appendix. The obstacle design, or 20 ' opening ), 14 publication order form efficiently Use of Sloping Pipe with... And Gutter with Construction Joint, 20 Transportation Department ) standard sheet culvert.. More than 20-ft between the extreme inside faces of providing the necessary culvert length is reasonable table removal! Section 2, 8. rails filenames that have the companion icon can be in. 15, or 20 ' opening ), 14 directly to specifications, refer to the Mounting Details ECD... Bridge rails of any type directly to specifications and learn more about who we are Tesco Controls Service Pedestal 26-000., 7a to the Mounting Details ( ECD ) standard sheet ( WB-50 Vehicle. Using this web site is intended for the consumers convenience Plan View ), 8. rails have the companion can! Cad standard Plan files Disclaimer Class a and Typical, 7a Pavement &. On the icon culvert ceiling Slopes needed to protect an obstacle other a! ( Plan View ), 8. rails select an appropriate design 08/03/07 ) of barriers! That have the companion icon can be viewed in Adobe Acrobat Reader by clicking on the icon information... Section 2 traffic Light Heads ( Signal Head and Pole Placement Chart ), 12 ( updated ). 10, 15, or 20 ' opening ), 12, 10, 15 or.