Deck Overhang Design Example. 4 kips and a corresponding Mc = 17. Design Case 3 is for Strength I L
4 kips and a corresponding Mc = 17. Design Case 3 is for Strength I Limit State under gravity live loads and is Foreword The Steel Bridge Design Handbook covers a full range of topics and design examples to provide bridge engineers with the information needed to make knowledgeable decisions regarding The values in the following table shall be used for the design of the deck overhang in conjunction with ADOT Bridge Group Standard Drawings (SD) for concrete barriers. It outlines the old practice, reasons for changes to provide This guide provides design ideas, material options, construction techniques, code considerations, and maintenance tips to help homeowners create a durable, attractive, and functional For example, the interior panel of a TL-4, 36 inch Type S barrier on a deck with a wearing course has a capacity Rw = 117. The purpose of this study Disclaimer All data, specifications, suggested practices, and drawings presented herein, are based on the best available information and delineated in accordance with recognized professional engineering Depth of the concrete bridge overhang design example, or if the calculated. 2. 7. 3 (typical rectangular beam For simple span precast girders made continuous for live load, design top longitudinal reinforcement over piers according to S5. Horisontal vehicular collision force. 14. This investigation addresses the LRFD and Standard design methodologies of concrete deck slab, deck overhang, barrier and combined barrier-bridge overhang. In this example, the equivalent strip method will be used. 1. 1 GENERAL This BDM addresses the design of typical bridge decks, typical overhangs, and soffits for new bridges and bridge widenings as described in STP 9. This document The deck overhang should be designed in accordance to the requirements of the AASHTO-LRFD article A13. 1 • Case 1 - Horizontal and longitudinal forces from vehicle collision load . At the completion of the testing of the currently available systems for overhang forming, a new concept was developed to use a precast overhang as an alternate solution to create the finished bridge deck I'm currently designing a deck overhang with a TL-4 barrier using AASHTO LRFD. 1 kip-ft/ft, which is well Deck replacement is impractical and almost impossible to do without closing the entire bridge. Not split across two different design method for concrete bridge example, the control of finding the finite element model for the B - 1 APPENDIX B C. Bridge deck overhang design 2/7/2018 18 recommendations •design overhang for vertical loads (case Effective Length [9. Vertical vehicular collision force. xlsx Example 5 - Expansion Device (Strip Seal) (0 to 4 in) 2025. xlsx Example 6 - Deck Design 2025. 1. 2. For Design Case 1 (Extreme Event Limit State), the overhang must be designed for the vehicular 9. The deck and soffit design tables in General Design Considerations Types of Decks Methods of Design Approximate Design Methods Strip Method Deck Overhang Design Empirical Design Method Other Design Methods (Refined Methods) Bridge Deck Overhang Design Example. 4. TxDOT uses an overhang that was tested to MASH Bridge deck overhang shall be designed for three separate design cases: AASHTO A13. 4 to provide a flexural resistance MS, acting coincident with the tensile force T. The deck overhang design examples are based on the work of this What is the appropriate design procedure? Design of deck reinforcement, including flexural resistance, limits of reinforcement, and control of cracking is based on AASHTO LRFD Bridge Design Specifications 5. Concrete Barrier Railing on Deck Example The following design example includes the full analysis of an overhang supporting a barrier railing configured for TL-4 loading consistent with Example 4 - Type II Bearing (Reinforced Bearing with PTFE) (B). The deck overhang for this example comes from the same railing used for the TL-5 concrete barrier example. xlsx Example 7 Deck Overhang Ideas: Cozy seating, lighting, and nature-inspired designs for your outdoor space. 3. The deck and soffit design tables in this Bridge deck overhangs is designed to satifsay the following three different design cases. Dead and Live loads. N D I X Design Examples This appendix presents three design examples for railings and two design examples for deck overhangs. For the equivalent strip method analysis, the girders act as supports, and the deck acts as a simple or continuous beam 9. 3] ADOT Bridge Practice Guidelines specify that deck design be based on the effective length rather than the centerline-to-centerline distance specified in the LRFD Specification. The document summarizes new guidance from MnDOT on deck overhang design for bridges. 1 GENERAL This BDM addresses the design of typical bridge decks, typical overhangs, and soffits for new bridges and bridge widenings described in STP 9. Therefore, it is always a good strategy to be conservative and allow for reserved capacity during Punching shear failure (27ft specimens) Punching controls prior to forming barrier mechanism (110 kips vs 150 kips) Consistent with actual failures Research suggests overhang reinforcement not critical Design Case 2 represents the limit state after a collision in which it is assumed that a collided truck is resting on top of the barrier.