Design Step 4 Design of Deck Prestressed Concrete ... - IN.govDesign Step 4 Design of deck. Prestressed Concrete Bridge Design Example. Task Order DTFH61-02-T-63032. 4-2 dead and live loads acting on the deck. The Empirical Design Method requires less reinforcement in the interior portions ... 60 ksi. slab conc. compressive strength. = 4 ksi. Concrete density. = 150 pcf. Future wearing surface density. = 30 psf. Design Step. 4.2. deck THICKNESS. The specifications require that the minimum thickness of a concrete deck, excluding any.
concrete deck slab table of contents - chapter 10 - Virginia ...10 Mar 2015 ... deck slab DESIGN LRFD. SAMPLE DESIGN CALCULATIONS. VOL. V - PART 2. DATE: 10Mar2015. SHEET 7 of 13. FILE NO. 10.01-7. Required: deck reinforcement for a steel plate girder. Design Specifications: AASHTO LRFD Bridge Design Specifications with current Interims and VDOT Modifications. Data Provided: Girder spacing = 10 feet t. = 8.5 inches fc'. = 4 ksi fs. = 60 ksi. Est. = 29,000 ksi. Future W.S. = 15 psf. Min. top flange = 12 inches. Dead Loads:.
concrete decks - Caltransreinforcement or prestressing steel, usually between 7 and 12 inches, with reinforcing steel interspersed transversely .... in the slab, respectively. The width of an equivalent strip (interior strip) is dependent on the type of deck ... methods are not typically used to analyze a standard bridge deck. A refined analysis method would be better suited for a more complex deck slab structure, which would require a more detailed analysis. 10.3.3.3 Empirical Method of analysis. Empirical Design ...
Continuous Span Reinforced Concrete Slab Bridge24. Creating a Member Alternative: Exterior slab. 25-27. Defining Live Load Distribution Factors. 28-30. Defining The Girder Profile. 31-35. Member: interior slab. 36-44. Applying Dead Loads. 39. Creating a Member Alternative: interior slab ..... VERSION 6.2. DEFINING THE GIRDER PROFILE. Double click Girder Profile. Under the Section tab input the appropriate information: Beam Dimension: 12.00 in since a 12 inch wide portion of the slab is analyzed. Concrete Material: Select A4.
Comprehensive Design Example for Prestressed Concrete (PSC ...27 Jun 2017 ... The Empirical Design Method requires less reinforcement in the interior portions of the deck than the Approximate Method. For this example, the Approximate ... controls deck slab design. For this example, a slab thickness of 8 in., including the ½ inch integral wearing surface, is assumed. ... Using the approximate method of deck analysis (S4.6.2), live load effects may be determined by modeling the deck as a beam supported on the girders. One or more axles may be ...
floor deck catalog - ASC Steel DeckComposite and Non-Composite deck Catalog V2.0 3 www.ascsd.com. Panel Features and Benefits 1.1. Composite deck. 3 inch depth, 32 inch coverage. 10 foot to 15 foot Optimal Span Range. No Acustadek Options. Longest unshored spans. Excellent alternate to SDI DR (deep rib) profile. Lower composite deck-slab weight than 3WxH-36 for the specified concrete thickness. 8 inch on center low flute spacing to allow for bearing wall studs to be at 16 inches on center.
chapter 10 concrete decks - CaltransAASHTO Table 188.8.131.52.3-1 only applies for interior strips and not for overhangs. 10.3.3.2 Refined Methods of analysis. The Refined Methods of analysis (AASHTO Article 4.6.3) as listed in AASHTO. 4.4 are acceptable methods for analyzing concrete bridge decks. But these various methods are not typically used to analyze a standard bridge deck. A refined analysis method would be better suited for a more complex deck slab structure, which would require a more detailed analysis.
composite steel floor deck - Marlyn Steel Decks, Inc.Commentary: Since the composite deck is the positive bending reinforcement for the slab, it must be designed to last the life of the structure; a minimum recommended finish is a galvanized coating as defined in ASTM A653-. 94, G60 (Z180). .... deck or as described in ANSI/AWS. D1.3. A minimum visible 5/8 inch (15 mm) diameter puddle weld or equivalent is required at all edge ribs, plus a sufficient number of interior ribs to provide a maximum average spacing of 12 inches (300 mm).
The effects of concrete strength on steel-deck-reinforced slabsconstruction and as positive reinforcement for the slab. A system in which the steel deck has some mechanical means of providing positive inter- locking between the deck and the concrete is termed as a composite steel- deck floor slab. l. An example is shown in Figure l[l]. .... includes behavior and analysis of steel-deck-reinforced slabs having dif- ferent strengths of concrete. .....
LRFD Steel Girder SuperStructure Design Example - LRFD ...27 Jun 2017 ... The next step is to decide which deck design method will be used. In this example, the equivalent strip method will be used. For the equivalent strip method analysis, the girders act as supports, and the deck acts as a simple or continuous beam spanning from support to support. The empirical method could be used for the positive and negative moment interior regions since the cross section meets all the requirements given in S184.108.40.206. However, the empirical method ...
Girder Bridge - Federal Highway AdministrationGirder elastic modulus at transfer, Eci. = 4,200 ksi. deck slab elastic modulus, Es. = 3,834 ksi. Reinforcing steel. Yield strength, fy = 60 ksi. Prestressing strands. 0.5 inch diameter low relaxation strands Grade 270. Strand area, Aps. = 0.153 in. 2 .... girder top flange. Analyze interior and exterior girders, determine which girder controls. Is the assumed thickness of the slab adequate for the girder spacing and the girder top flange width? Revise deck slab thickness. NO. YES. Design the.
Composite Steel Floor Deck - Slabs - Steel Deck InstituteSTEEL deck. INSTITUTE s. . The Steel deck Institute has developed the material contained herein. The Institute has made a diligent effort to present accurate, reliable, and useful information on design of composite steel deck-slabs. The materials set forth herein are for ... accepted meaning for the context for which they are intended. G. It shall be permitted to specify deck .... on the contract dings: Composite slab shall consist of 2 inch deep G-60 galvanized composite steel deck, ...
deck products - Bushwick Metalsshown in the Steel deck Institute (SDI) design manual. 2. Minimum exterior bearing length required is 1.5 inches. Minimum interior bearing length is. 3 inches. If these minimum lengths are not provided, web crippling must be checked. ..... slab. Max Unshored. Superimposed Live Load in Pounds Per Square Foot. DepthGage. Clear Span. One. Two Three 9'-0 9'-6 10'-0 10'-6 11'-0 11'-6 12'-0 12'-6 13'-0 13'-6 14'-0. 22. 8-7. 11-1. 11-5. 134. 118. 105. 93. 83. 74. 67. 60. 54. 48.
Bridge Deck Design - Federal Highway Administration - US ...17 Nov 2012 ... deck slab, and may need to be adjusted if a thicker deck slab is used. Also, spacing of the steel reinforcement can not exceed 18 inches, and the steel reinforcement must have a yield strength of 60 ksi or greater. The empirical method can not be applied to cantilever portions of the deck slab. 2.4 Other Methods of analysis and Design. Article 9.6.1 of the AASHTO LRFD (5 th. Edition, 2010) allows for the use of refined methods of analysis for deck slabs as specified in ...
Bridge Design Guidelines - Examples - Arizona DOTeffective length rather than the centerline-to-centerline distance specified in the. LRFD Specifications. The effective length for monolithic cast-in-place concrete is the clear distance between supports. For this example with a centerline-to-centerline web spacing of 7.75 feet and web width of 12 inches, the effective length is 6.75 feet. The resulting minimum deck slab thickness per ADOT guidelines is 8.00 inches. In-depth rigorous analysis for deck design is not warranted for ordinary.
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