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# Florida Department of Transportation

CHARLIE CRIST GOVERNOR | 605 Suwannee Street Tallahassee, FL 32399-0450 | STEPHANIE KOPELOUSOS INTERIM SECRETARY

January 31, 2007

MEMORANDUM

TO: | All Users of the Florida Department of Transportation Structures Manual including Structures Design Guidelines, Structures Detailing Manual, and Structures Standard Drawings.
FROM: | Robert Robertson, State Structures Design Engineer
COPIES: | Director Office of Design, Lora Bailey Hollingsworth; FHWA, Jeffery Ger; Assistant State Structures Design Engineers (Andre Pavlov, Larry Sessions, Lex Collins, and Marc Ansley); State Geotechnical Engineer, Larry Jones; District Structures Design Engineers (Gerard Moliere, Rod Nelson, Keith Shores, John Danielsen, Neil Kenis, Jorge Rodriguez, Jose Danon, and Agnes Spielmann); District Structures and Facilities Engineers (Pepe Garcia, Keith Campbell, John Locke, Ron Meade, Frank Guyamier, Aran Lessard)
SUBJECT: | Structures Manual (625-020-018) including the Structures Design Guidelines, Structures Detailing Manual, and Design Standards.

The Florida Department of Transportation Structures Design Office has officially released the January 2007 Structures Manual including the Structures Design Guidelines, Structures Detailing Manual, and Structures Standard Drawings. Copies of the Structures Manual can be downloaded from the Structures Office website at www.fdot.gov/structures.

The Structures Manual is a web based (html) document and includes hyperlinks, navigation tools, indexes, and advanced search capabilities. PDF's for the Design Guidelines and Detailing Manual are included for printing purposes. Standard Drawings and Drawing Examples are available in both MicroStation format (dgn files) and PDF format.

The Structures Manual will be updated twice a year (January and July) and serves as the single source for FDOT design criteria for structural designs prepared by the Department and consultant designers. All users of the Manual are encouraged to submit suggestions to improve and further develop the contents thereby providing maximum assistance to the structural engineering community. Submit any suggestions to Andre Pavlov, Florida Department of Transportation, 605 Suwannee Street, MS 33, Tallahassee, Florida32399-0450, or e-mailed to andre.pavlov@dot.state.fl.us.

The design criteria shall be incorporated on all future projects and on those projects currently being developed (i.e., when design and detailing has not already reached final stages). Where incorporation is not feasible, a request for a variance shall be submitted. For specific questions about the Manual, or its application to a particular project, contact the appropriate District Structures Design Office.

Volume 1 Structures Design Guidelines Revisions
I.6 References Updated. Adopted 2001 Sign, Lighting and Signal Support Design Specification. Deleted Guide Specifications for Design of Pedestrian Bridges. Added Manual for Condition Evaluation and LRFR of Highway bridges.
Table I.1 Cross References from LRFD and & Table I.2 LRFD-MHBD to SDG.
1.1.6 ADA on Bridges - Added Section for ADA requirements.
1.4.1 General moved modulus of elasticity requirements from 4.1 to 1.4.1 General, incorporating TDB 06-08.
Table 1.2 Concrete Cover - Correct footnote symbols, change "milling" to "planing"
1.6.1 General - Rev F. to further restrict use of adhesive anchors for sustained tension loads.
1.6.2 Notation - Parameter S. Deleted "unless approved by the State Structures Engineer." and added commentary.
2.4.2 Wind Loads for Other Structures - Replaced PPM reference with reference to Structures Manual, Volume 9.
2.4.3 Wind Loads During Construction Deleted B. , and the wind pressure during construction will be one-half the calculated horizontal wind pressure used for final design.
2.6 Vehicular Collision Force - Section revised per TDB C06-06, Policy for Pier Protection, and provided further clarification in Section 2.6.8 B & C.
3.5.10 Test Piles Per TDB C06-10, added paragraph D. requiring embedded data collectors.
3.10 Crack Control - Modified A. to apply to pier columns, pier caps and bent caps.
3.11 Pier, Column and Footing Design - Clarified paragraph "J" for top and bottom footing elevations for MLW and MHW.
3.14.4 Design Criteria Used to Develop the Standard Fender Systems - (B.3) - Revised applicability of the standard fender design and defined design assumptions.
3.15 Concrete Box and Three-Sided Culvert Design - Added New Section.
3.6.10 Minimum Reinforcement Spacing - Added new section.
4.1 General Moved modulus of elasticity requirements to SDG 1.4.1.
4.1.4 Shear Design - Added new section for clarification of shear design reqs in LRFD.
6.5.1 Design - Inserted new paragraph B.
6.7.1 General Revised B. and added paragraph C.
8.1.1 Applicability - Added D. prohibiting non-counterweighted designs. E. requiring clearances for thermal expansion and F. requirements for protection against water and debris.
8.2 Construction Specifications and Design Calculations - Requires detailed calculations to be included with 60% submittals.
8.5.3 Span Balance - Added paragraphs A.5 (limiting max unbalance at tip to 4 kips) and A.6 (requiring tight specs on concrete density and pour thickness for concrete decks).
8.5.4 Speed Reducers Added paragraph I. Requiring reducer, brake & motors on one support.
8.5.8 Couplings - Added paragraphs B, C and D. (requirements for coupling data).
8.5.10 Bearings (Sleeve and Anti-Friction) - Paragraph A. added requirement for base and cap with lifting eyes. Para C. added caution against water and debris trapping shapes and conditions.
8.6 Hydraulic Systems - Added F. requiring acceptance criteria for pressure uniformity in multiple cylinders.
8.6.2 Cylinders - Inserted C. requiring rod-end and blind-end cushions.
8.9.3 Span-Jacking of New Bridges - Requires Designer to estimate jacking loads and show on drawings.
10 Pedestrian Bridges - Added chapter per TDB C06-07 except that Ramps and ADA information references have been added to the PPM.

Volume 2 Structures Detailing Manual - Revisions
9.2 Finish Grade Elevations Deleted requirement for max. 10 ft spacing for T-Lines.
13.3.13 Reinforcing Bar Lists Added paragraph B, info for organizing component lists.
13.11 Prestressed Beam Bearings Updated Standard Index numbers. Added reference to volume 3.
13.12 Approach Slab - Updated Standard Index numbers, added reference to Sitemenu Data Tables.

Volume 8 FDOT Supplements to LRFR Revisions
2.2.17 Rating Records - Added requirement for including the LRFR Summary form with the 90% submittal.
6.4.2 General Load Rating Equation - Deleted the requirement for refined estimates of time-dependent losses.
6.5.4.1 Design-Load Rating - Added "Prestressed deck/girder bridges with a continuous deck but without continuous girders shall be load rated as simple spans."
6.5.9 Evaluation for Shear - Added clarification for shear analysis requirements for load rating.
6.8.3 Posting Analysis (New) - Added section.
Table 6-1 - Corrected table
Table 6-9B - Deleted spliced girders from last row
D.6.1.4 Application of Standard Design Specifications (NEW) - Added section.
E.6.8.5 Permit Load Rating - Replace striped lanes with 70% Live Load.
F.6 Posting Avoidance - Revised second paragraph to require Load Rating in accordance with LRFR 6.1.7 using either LRFR or LFD specifications. Clarified when posting avoidance techniques are to be used and not used.
F.6.5 Principal Tension - Segmental Concrete Bridges (Box Girders) (Variance) C hanged section title.
F.6.11 Reduced Superimposed (DW) Dead Load (Exception) Deleted section.
G.6 Load Rating Summary Form and Detail Sheets (New) Added section.

Volume 9 Miscellaneous Structures Guidelines
Signs, Luminaires and Traffic Signals Added new section.