ACI ITG-3-04

This document outlines procedures for the design of bridge decks free of steel reinforcement and requirements for design and installation of straps to restrain rotation of edge beams to achieve arching action in a deck slab.

The concept for the design of a steel-free bridge deck slab described in this report is patented. Therefore, use of the information in this document may require payment of royalties to the owners of the patents. At the time of printing, the United States and the United Kingdom have granted a patent for the steel-free cast-in-place bridge deck slabs, with a patent pending in Canada. The steel-free precast slab is also patented in the United States, and the global patent is pending. Interested parties are invited to submit information regarding the identification of an alternative(s) to this patented item to ACI Headquarters. Your comments will receive careful consideration at a meeting of the responsible standards committee, which you may attend.

The American Concrete Institute takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this report. Users of this report are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
brThe inventor of the reinforcement-free bridge deck concept described in this report sponsored preparation of the report and provided reimbursement to the authors to assist in recovery of their costs and expenses related to travel to meetings; however, none of the authors received an honorarium.

Conclusions from research conducted since the documentwas first written are included in Appendixes B and C.



Keywords: arching; bridge; composite action; corrosion; deck slab; fiber-reinforcedconcrete; reinforcement-free; transverse confinement; transverseconstraint.

Chapter 1-Introduction
1.1--Purpose1.2--Scope and objectives1.3--Further research needs

Chapter 2--Definitions and abbreviations

Chapter 3--Design methodology
3.1--Composite action3.2--Beam spacing3.3--Slab thickness3.4--Diaphragms3.5--Haunches3.6--Transverse confinement3.7--Strap spacing3.8--Strap size3.9--Strap connection3.10--Strap connection in negative moment regions3.11--Edge stiffening3.12--Reinforcement for transverse negative moment3.13--Reinforcement in longitudinal negative moment3.14--Fibers in concrete3.15--Crack control

Chapter 4--Materials

Chapter 5--Special considerations
5.1--Transverse edge stiffening
5.2--Skew angle5.3--Concrete parapet connection5.4--Cracking5.5--Splitting stresses5.6--Provisions for safety5.7--Fatigue resistance of deck slabs

Chapter 6--Design examples
6.1--Common features6.2--Transverse edge beams6.3--Parapet wallChapter 7--Case histories

Chapter 8--Construction and constructibility,
8.1--Connection straps8.2--Formwork for slab8.3--Mixing fibers8.4--Finishing FRC surfaces8.5--Precast installation

Chapter 9--Maintenance and cost effectiveness
9.1--Maintenance9.2--Repair9.3--Costs

Chapter 10--References
10.1--Cited references

Appendix A--Postcracking strength of FRC testmethod

Appendix B--Crack control and fatigue resistanceof reinforcement-free deck slabs
B.1--Purpose and scopeB.2--Comparative resultsB.3--References

Appendix C--Fibers and control of cracks due tovolumetric change
C.1--References

Appendix D--Research needs
D.1--Research goalsD.2--Areas of major R D focus