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Proposed BDDM Changes for April, 2017

Letter from State Bridge Engineer, Bruce V. Johnson 

Proposed updates to the Bridge Design and Drafting Manual see

The following revisions are in reference to current BDDM section numbers:

Section 1 – Design and Detailing Practices

Section 1   Substitute AC with PPC on bridges and overlays –
                AC with
                membranes are problematic due to leakage and bonding issue for
                the more impervious spray membranes and AC. AC is also a
                problem in that it isn’t always compacted properly and cannot be
                tested effectively for compaction. AC on bridge decks also has
                shown signs of stripping, and leading to many potential AC failure
                modes. These failures cause ODOT to expend maintenance
                resources and are very costly. Thus, remove AC from bridge decks
                and substitute with structural or polymer materials.
  Tension Development Length – Update and provide guidance to
the new development length calculation.    Fixed Girder Connections – Modify the guidance to age of girder for

1.9.1           Design and Detailing – Update section to provide for the detailing of deck steel in acute corners.       Pile Foundation – Provide additional guildance for pile tip treatment.
1.13             Rails, Impact Attenuators, and Protective Screening – Update bridge rail section to provide correct guidance related to outdated standard drawings and design per the old LFD 10 kip design load. 
1.16             Americans with Disabilities Act compliance for bridge projects- Provide guidance on the ADA application to the unique situations created by bridge rehabilitation and maintenance projects.
1.23            Skewed Bridge End Panels – Add section to provide guidance for
the detailing of end panel with skew > 30degree.
1.26.5        Protection for steel piling– Update guidance for 3-coat and 4-coat systems. Also a boiler plate specification for 00520 Special Provisions.


1.38.1          Bridge Temporary Works – update reference to new spec.


Section 2 – Drafting Practices

Section 2       Updates for Projectwise and 11x17 format.
2.1.2   Remove ProjectWise (PW) start date references
Clarify external user access to PW   Add references to PW
Add link to CPM
Clarify TIF format Changes to processes as a result of PW Add direction for requests to add new standard detail Add PW information
2.1.4 Clarify directions
2.1.7 Clarify directions
2.2.4 Remove figure and link to example drawings
2.2.5 Remove figure and link to example drawings
2.4.1 Change Foundation Data to Geotechnical Data
Add direction for sheets that apply to multiple structures
Moved info regarding BDS access to Section 2.8.2 Bridge Data
2.4.2 Add text regarding sheets that apply to multiple structures
Change use of title block name area
Add For Information Only drawing plans list instructions
2.5 Add directions for print set file
2.6.1 Clarify plan and elevation view requirements
2.7.2 Add Cathodic Protection to sheet order list
2.7.3 Link to TS&L section and remove duplicated paragraphs
Add note regarding location of bridge rail pay limits
2.7.6 Add link to Section A2.3 Deck Plan
2.8.2 Add directions for BDS requirements
2.10 Add information regarding documents in ProjectWise


Section 3– Procedures and Layout

3.10.7   Calculations & Calculation Books– Update requirements for calculation books and submittal.


Update splice length table for Concrete Class 3300 and 4000. Added the splice
length table for Concrete Class 4500.