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10/14/2021 1
PRECAST BOX CULVERT DESIGN OUTPUT
USING ERIKSSON CULVERT
VERSION 5.11.0.0
Presenters
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Wayne Hodge, PE• Rinker
Corey Haeder, PE• Forterra
Brian Barngrover, PE• Eriksson
The Goal• Compare program input and design output
– What is it telling us?– What is behind the curtain?
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The Challenge• 16’ Span x 8’ Rise Box • 2’ Fill (1.99)• HL93 Loading• AASHTO LRFD• No Skew• Thinnest Top Slab
Possible . . . ??
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Discussion Format• Parallel Comparison
– Program Input– Design Output
• Pre-Recorded• Poll Questions• Q/A at the end
– # on each slide– Enter # and ? in Chat
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Poll Question #1
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54321
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10/14/2021 8High Level Recap – “Up To Date”
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Quick Check of Rating
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Same as the Design Output
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• “Design Mode” – program calculates starting steel design• “Analysis Mode” – user can customize steel per production preferences
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• AASHTO LRFD 5th, 6th, 7th, 8th or 9th available• STD Code, CSA and AREMA also available• “Method” only applies to STD code (ASD / LFD)
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Analysis Options: Consider internal water pressure: yes Check slenderness: no Use haunches in analysis model: yes Use haunches for critical sections: yes Extend critical sections: no Use max moment with max shear: yes Always distribute wheel load: yes Combine axle overlaps: yes Live load deflection criteria: 1 / 800 Limit LL distribution width if fill > 2 ft: no Limit LL distribution width if fill < 2 ft: yes Include impact on bottom slab: yes Automatically account for skew effects: no Use LRFD 12.10.4.2.4a-1: yes Always check iterative beta method: no
Static Loads: Soil equivalent fluid pressure, max: 60 Soil equivalent fluid pressure, min: 30
Live Loads: Include lane load: no Traffic direction: parallel
Reinforcement: Type: mesh Epoxy type: none
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• Precast or Cast-In-Place• US or Metric Units
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6” Top Slab –Starting Point
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Design Types: Four-sidedThree-sided
Three-sided Inverted Vertical Box
Support Types only apply to Three-sided
Length of a precast piece
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For Skew Angles – can be used to determine Parallel (<30 deg) or Perpendicular (>30 deg)Or
Choose Parallel / Perpendicular on Live Load Input Screen
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MoR Factors
LL Distr Factor
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Design Deficiencies appear if present.If design meets code – does not appear.
Poll Question #2
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54321
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16’ SPAN - include lane load
1.05
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Option –Trapezoidal
Reaction
Future –Flexible
Foundation
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Poll Question #3
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54321
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Try 12”
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Poll Question #4
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54321
10/14/2021 55How do we get this into AASHTOWare?
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What is really behind the Curtain?
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Wayne HodgeRinker Materials6560 Langfield Road; Bldg 3Houston, TX 77092832-590-5368wayne.hodge@rinkerpipe.com
Corey HaederForterra6655 Wedgwood Rd; Suite 130Maple Grove, MN 55311605-209-4194corey.haeder@forterrabp.com
Brian BarngroverEriksson Software5460 Ward Road; Suite 200Arvada, CO 80002813-989-3317barngrover@lrfd.com
Thanks for your participation!
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