Structural - Engineering Review Checklist

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1 Structural - Engineering Review Checklist Project: List Corridor Criteria ID Review Priority (H,M,L) TOPICS S-_-## Structural Design Codes, Manuals and Specifications REFERENCES DESIRED Criteria (D) MINIMUM Criteria (M) ABSOLUTE MINIMUM Criteria - Requires Written RTD Approval (am) Load Factor Design Load Factor Design Load Factor Design Allowable Stress Design Allowable Stress Design Allowable Stress Design Load and Resistance Factor Design (LRFD) Load and Resistance Factor Design (LRFD) Load and Resistance Factor Design (LRFD) Date Submitted: Date Reviewed: Reviewer Initials: Indicate Level of Criteria Met (D, M, am) where Hi-Lited 50% 65% 90% Final Specify design ed Specify design ed Specify design ed NOTES S-_-## Building Codes (Most recent edition) International Building Code International Building Code International Building Code City and County of Denver City and County of Denver City and County of Denver State of Colorado State of Colorado State of Colorado Structural Specialty Code Structural Specialty Code Structural Specialty Code Fire and Life Safety Code Fire and Life Safety Code Fire and Life Safety Code Local Jurisdictional Codes Local Jurisdictional Codes Local Jurisdictional Codes Specify design ed Specify design ed Specify design ed Specify design ed Specify design ed Specify design ed S-_-## Earth Retaining Structures Geometry Slope on both sides per geotechnical recommenslope on both sides per geotechnical recommend Provide drainage system Provide drainage system Provide 42" fence on top of walls 30" or higher. Provide 42" fence on top of walls 30" or higher. slopes on both sides of the wall drainage system fence and location Confirm slopes Submit calculations with plans Confirm drainage Submit drainage system with plans Confirm fence and location Confirm fence and location Type Provide a wall selection per Bridge Design Manual as directed by RTD Provide a memo to identify wall selected and reasoning Select wall as directed by RTD wall Design Requirements Minimum service life of 75 years - Standard Meet code requirements and recommendations Specifications for in geotech Recommendations in geotechnical Deviation from geotechnical Highway Bridges and Interims Meet code requirements and recommendations Bridge Design Manual in geotech Recommendations in geotechnical Deviation from geotechnical - American Railway Engineering and Maintenance-of- Meet code requirements and recommendations Way Association in geotech Recommendations in geotechnical Deviation from geotechnical Show wall and material and material Confirm code Submit support require-ment Confirm code require-ment Confirm code require-ment Submit support Submit support Characteristics Mechanically Stabilized Earth (MSE) Walls Reinforced Concrete wall panels Reinforced Concrete wall panels Corrosion for prestressing steel Corrosion for prestressing steel All reinforcing to be galvanzed or epoxy coated in splash s. Minimum 2" cover to reinforceing steel Specify wall panel corrosion Specify E.C. reinf. steel in splash Confirm wall panel Submit wall panel Confirm corrosion Submit corrosion Specify E.C. reinf. Specify E.C. reinf. steel in splash steel in splash Panel Joints Modular walls Section 206 of Standard Specifications Joints to accommodate differential settlement Joints to accommodate differential settlement for Road and Bridge Construction Mechanical connection to wall facing for soil reinforcement shall be provided. Wall height shall not exceed 15 feet. joint and wall and Confirm joint and and Submit joint calcs and

2 Cast-in-Place Walls, Standards standard retaining wall criteria and Recommendations from geotechnical investigation Deviation from geotechnical investigation Show wall Confirm wall and typical section geometry calcs and Anchored Walls FHWA RD , FHWA RD Anchors shall be encapsulated with plastic sheathing and FHWA IF guidelines Proof load tests for anchors shall be provided Recommendations from geotechnical investigation Proof load tests for anchors shall be provided Deviation from geotechnical investigation wall and Specify load test Show anchor Confirm load test calcs and Confirm load test Soil Nail Walls Shotcrete shall meet the aesthetic requirements Shotcrete shall meet the aesthetic requirements FHWA RD-89-93, FHWA SA Top-down construction Top-down construction Shall not be used if water infiltration may be a and FHWA SA guidelines problem Provide load testing for nails. Provide load testing for nails. Shotcrete shall meet the aesthetic requirements Shotcrete shall meet the aesthetic requirements Specify shotcrete Confirm aesthetic Confirm aesthetic aesthetic features features features wall and Show soil mail and facing detail calcs and. Verify no water Verify no water Verify no water infiltration infiltration infiltration Specify load test Confirm load test Confirm load test Specify shotcrete aesthetic features Confirm aesthetic features Confirm aesthetic features S-_-## Concrete Lightweight is not permitted Concrete strengths and properties shall meet Concrete strengths and properties shall meet the requirements of Section 601 of the requirements of Section 601 of Deviation from standard Specify Specify strength in general strength in general Submit calcs using specified strength S-_-## Structural Steel S-_-## Prestressing Steel Structural steel strengths and properties shall meet the requirements of Section 509 of Structural steel strengths and properties shall meet the requirements of Section 509 of Prestressed steel strengths and properties shall Prestressed steel strengths and properties shall meet the requirements of Section 714 of meet the requirements of Section 714 of Maximum diameter for strands Maximum diameter for strands shall be 0.6" for a 2" minimum spacing and 0.5" for a 1 3/4" spacing shall be 0.6" for a 2" minimum spacing and 0.5" for a 1 3/4" spacing Deviation from standard Deviation from standard Specify structural steel strength in Specify prestressed steel strength in Specify structural steel strength in Specify prestressed steel strength in Submit calcs using specified strength Submit calcs using specified strength S-_-## Post-tensioning steel systems Post-tensioning product shall meet the requirements of Section 714 and grout shall meet Section 618 of Standard Specifications for Road and Bridge Systems shall be provided by certified PTI plants. Provide corrosion grout Post-tensioning product shall meet the requirements of Section 714 and grout shall meet Section 618 of Standard Specifications for Road and Bridge Systems shall be provided by certified PTI Deviation from standard plants. Provide corrosion grout Specify P/T and grout requirements in general Confirm P/T and grout requirements S-_-## Reinforcing Steel Reinforcing steel strengths and properties shall meet the requirements of Section 602 of Epoxy coated reinforcing shall meet the requirements of Table 1, Subsection 8.1 of Bridge Design M Reinforcing steel strengths and properties shall meet the requirements of Section 602 of Epoxy coated reinforcing shall meet the requirements of Table 1, Subsection 8.1 of Bridge Design M Deviation from standard Specify reinf. steel Specify reinf. steel S-_-## Timber Timber structures shall meet the requirements of Section 508 of Standard Specifications for Road and Bridge *For timber structures subjected to LRT or (, and )* highway loading. (National Design Specification for **For timber structures not subjected to LRT or Wood Construction)** highway loading. Timber structures shall meet the requirements of Section 508 of Standard Specifications Deviations from standard for Road and Bridge Specify timber Specify timber Verify calcs and

3 Permanent timber structures over 20' in length shall not be permitted. Review to confirm no timber structure is over 20' S-_-## Temporary Structures Remove all material for temporary structures both above and below ground. Remove all material for temporary structures both above and below ground. Any material for temporary structures to be left in place. S-_-## Slabs Design for HS-15 truck loading at a minimum for pedestrian crossing. Design for HS-15 truck loading at a minimum for pedestrian crossing. Provide slab at least 2 feet wider than track tie length for LRT loading. specify loading in Verify calcs with required loading confirm loading Provide slab at least 2 feet wider than track tie length for LRT loading. Verify slab width Verify slab width Verify slab width S-_-## Tunnels S-_-## Bridges Tunnels greater than 400 feet shall have directfixation track fixation Tunnels greater than 400 feet shall have direct- track Provide drainage system Provide drainage system NFPA 130 Provide standpipes Provide standpipes Provide ventilation and emergency telephones Provide ventilation and emergency telephones Specify DF in general drainage system feature feature Confirm DF in general Verify DF in calcs Confirm drainage Submit drainage system Confirm the feature Submit Confirm the feature Submit Geometry Provide 2:1 maximum slope, 2 ft. berm, 2 ft. Provide 2:1 maximum slope, 2 ft. berm, 2 ft. vertical clearance under spill through vertical clearance under spill through abutments. Provide 16'-6" vertical clearance abutments. Provide 16'-6" vertical clearance under vehicular bridges Provide 17-6" under vehicular bridges. Provide 17-6" vertical vertical clearance under pedestrian bridges. clearance under pedestrian bridges Provide 17-0" vertical cl Provide 17-0" vertical clea Show all requirements on general sheet Review calcs and Confirm all geometric documents geometric features Structure Type Inspection Access Components Bridge and Pedestrian Fencing Approach Slabs Structure restricted to those historically used by RTD unless other s are approved by RTD. Superstructures, joints and bearings shall be made accessible for inspections. Structure restricted to those historically used by RTD unless other s are approved by RTD. Superstructures, joints and bearings shall be made accessible for inspections. LRT structures shall have a pedestrian fence adjacent to the emergency / maintenance walkway. Minimum Height=42" Walls greater than 30" above the adjacent surface outside the LRTenvelope shall have a pedestrian fence or barrier. 25 feet minimum in length, 2 feet wider than track tie length Bridge Decks Minimum deck thickness=8" Deck Joints Steel bridges up to 300' shall be jointless Concrete bridges up to 400' shall be jointless structure on general layour fencing Confirm proposed structure calcs Confirm Confirm meet requirements meet requirements Confirm proposed fencing Show approach Confirm slab slab in dimen-sions Show deck thickness in typical Confirm deck section thickness Show joint if Verify joint required Show joint if required Verify joint Confirm proposed fencing Confirm slab dimen-sions Superstructures Steel Superstructures: Redundant member structures are preferred. Show girders on typical section Confirm girder and numbers Concrete box girders: Consider effects of temperature gradient. Utilities placed on superstructures with prior approval of RTD If placement of utilities on the structure is approved by RTD the placement shall be designed by a Colorado Licensed Professional Engineer and the utilities shall be hidden from view. Bearings Elastomeric bearings are preferred. Meet structural and aesthetic design Piers and Pier Caps requirements. Allow maintenance access and future replacement. Meet structural and aesthetic design requirements. Structure specific bearing s Meet structural design requirements. Show girders on typical section Show approved utilities on general Confirm utilities Show approved utilities on general Confirm utilities Confirm girder and numbers Show bearing Show bearing and Show pier and Show pier for utility loads for utility loads calcs for utility loads Autments Integral abutment supported by steel H piles. Tall, full-height, or MSE abutments as appropriate. Other abutment s. Retaining walls may be used instead of wingwalls. MSE walls Other wall s Show abutment Show abutment and Show wall and Show wall

4 Slope Protection Concrete slope shall be provided. Concrete slope shall be provided. Foundation design shall be in accordance with Foundation design shall be in accordance with the recommendations from the geotechnical the recommendations from the geotechnical Foundations investigation. investigation. Bridge deck drainage system shall be in Bridge deck drainage system shall be in accordance with Section of RTD Light Railaccordance with Section of RTD Light Rail Drainage Provide splash blocks at all deck drain daylight On direct fixation bridges, a trench drainage On direct fixation bridges, a trench drainage system, perpendicular to the tracks, shall be system, perpendicular to the tracks, shall be used at the end of the bridge deck prior to joint used at the end of the bridge deck prior to joint between approach slab and bridge between approach slab and bridge superstructure. superstructure. Show slope Show founda-tion Show deck drain Show splash block Show trench drain location Show slope Show founda-tion Confirm slope Show deck drain Review deck drain calcs Confirm splash Show splash block block and Show trench drain Confirm trench drain and Stray Current Control LRT Loading Structures and structural components shall be Structures and structural components shall be protected against corrosion due to stray current protected against corrosion due to stray current by using continuously welded steel mat, epoxy by using continuously welded steel mat, epoxy coated steel, or insulating membrane. coated steel, or insulating membrane. Design loads modified by the LRV loading diagram. A train consists up to four cars whichever number causes the most severe conditions. Design loads modified by the LRV loading diagram. A train consists up to four cars whichever number causes the most severe conditions. Confirm stray Show stray current current control control Show loading diagram on general info sheet Confirm stray current control Confirm loading diagram on general info sheet S-_-## Pedestrian Bridges Guide Specifications for Pedestrian Bridges Bridge Design Manual Coordinate with RTD for design of covers on pedestrian walkways over LRT tracks or roadways. Coordinate with RTD for design of covers on pedestrian walkways over LRT tracks or roadways. Show covers on general Show cover S-_-## Parking Structures criteria on general Confirm design criteria used RTD Design Guidelines and Criteria for Bus Transit Facilities RTD Design Guidelines and Criteria for Bus Transit Facilities RTD Design Guidelines and Criteria for Bus Transit Facilities S-_-## Geotechnical Analysis S-_-## Loads and Forces Provide preliminary recommendations during preliminary engineering phase. Provide site-specific final geotechnical and recommendations during final design phase. Provide preliminary recommendations during preliminary engineering phase. Provide site-specific final geotechnical and recommendations during final design phase. Dead Load In accordance with In accordance with Live Load In accordance with In accordance with Vertical Derailment Load: Produced by 2 to 3 Vertical Derailment Load: Produced by 2 to 3 vehicles with longitudinal axis parallel to track. vehicles with longitudinal axis parallel to track. Lateral vehicle excursion varies from 4 to 36 Lateral vehicle excursion varies from 4 to 36 inches for tangent track and for curved track inches for tangent track and for curved track with with radius greater than 5000 feet. For radii radius greater than 5000 feet. For radii 5000 feet Derailment Load feet or less e or less e Horizontal Derailment Load: For clearance Horizontal Derailment Load: For clearance between vehicle and barrier wall of 6 inches to between vehicle and barrier wall of 6 inches to 36 inches, with maximum vehicle speeds of inches, with maximum vehicle speeds of 60 mph, 40% of a single vehicle weight acting two mph, 40% of a single vehicle weight acting two feet above top of rail and normal to the barrier feet above top of rail and normal to the barrier wall for a distance of wall for a distance of In addition to the vertical impact per, In addition to the vertical impact per, a a horizontal impact force equal to 10% of the horizontal impact force equal to 10% of the LRV LRV shall be applied 42 inches above the top of shall be applied 42 inches above the top of the Impact the lower rail. lower rail. Longitudinal Forces Centrifugal Force A force equal to 15% of the LRV, without impact, per track, shall be applied 5 feet above the rop of rail on all tracks. Centrifugal force applied as per except force shall be applied 4 feet above the top of the lower rail of track A force equal to 15% of the LRV, without impact, per track, shall be applied 5 feet above the rop of rail on all tracks. Centrifugal force applied as per except force shall be applied 4 feet above the top of the lower rail of track Submit prelim geotech DL on general info sheet LL on general info sheet Submit final geotech Confirm design DL Confirm design LL

5 Wind Loads Application of Loadings H=0 to 40 ft, Tran WL=115 plf, Long WL=28 plf H=41 to 60 ft, Tran WL=126 plf, Long WL=31 plf H=61 to 100 ft,tran WL=130 plf, Long WL=34 plf H=0 to 40 ft, Tran WL=115 plf, Long WL=28 plf H=41 to 60 ft, Tran WL=126 plf, Long WL=31 plf H=61 to 100 ft,tran WL=130 plf, Long WL=34 plf One train per track for both strength and One train per track for both strength and serviceability considerations in all materials. serviceability considerations in all materials. When intended to occupy the same deck space When intended to occupy the same deck space as highway loads, either concurrently or at as highway loads, either concurrently or at separate periods of structure life, the rail transit separate periods of structure life, the rail transit loads shall be treated loads shall be treated Reduction in Load Intensity Force Due to Rail Restraint Loading Combinations A track shall be as a traffic lane in Specifications Continuous welded rail shall not be terminated on structures. loading combinations modified as follows: Add BNF, NF to the expression for Group (N) Add to the list of terms: RT=Rail Transit; NF=Nosing Force; DR=Derailment A track shall be as a traffic lane in Specifications Continuous welded rail shall not be terminated on structures. loading combinations modified as follows: Add BNF, NF to the expression for Group (N) Add to the list of terms: RT=Rail Transit; NF=Nosing Force; DR=Derailment Distribution of Load and Design of Concrete Slab Ballasted Track: Axle loads uniformily distributed longitudinally over a length of 3 feet, plus the depth of the ballast under the tie, plus twice the effective depth of slab. Limited by axle spacing. Wheel loads have a lateral distribution over a width equal to the length of tie plus the depth of Limited by the proximity of adjacent tracks or the ballast under the tie. extent of the structure. Direct Fixation Track: Rail Transit Collision with Structures Wheel load uniformily distributed longitudinally Wheel load uniformily distributed longitudinally over the length of three feet along the rail over the length of three feet along the rail Wheel load distributed transversely by width of Wheel load distributed transversely by width of rail fastener pad plus twice the depth of deck rail fastener pad plus twice the depth of deck and track. and track. Abutments and piers within 25 feet of centerline Abutments and piers within 25 feet of centerline track shall be protected with a reinforced track shall be protected with a reinforced crash wall crash wall

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