CRSI and Reinforcing Steel Update Bob Risser, P.E. President & CEO TTCC / National Concrete Consortium Fall 2012 Seattle, Washington 1
Agenda CRSI...
CRSI and Reinforcing Steel Update Bob Risser, P.E. President & CEO TTCC / National Concrete Consortium Fall 2012 Seattle, Washington 1
Agenda CRSI – The Organization Bar Markings CRSI “Mythbusters”
CRSI – The Organization The Concrete Reinforcing Steel Institute (CRSI) was founded in 1924, making it one of America’s oldest construction industry trade associations.
Associate members include: Epoxy coaters Equipment manufacturers Concrete contractors Other companies engaged in reinforced concrete construction.
CRSI – The Organization
Professional members include: Engineers Architects Construction managers Students
CRSI Membership Represents the Industry
90+% of all U.S. domestic rebar, smooth dowel, and wire production. 80+% of fabricated rebar tonnage. Most dowel baskets manufactured by CRSI members.
Transportation Efforts Bridges » Danielle Kleinhans, PhD, P.E., Structural/Transportation Engineer » Official Concrete Rep to LTBP » Chair of NCBC
Pavements » Partnership with ACPA » Cooperative Agreement with FHWA on CRCP
Adhesive Anchor Installer » Joint ACI-CRSI program » Launched in 2011 The Strength in Reinforced Concrete
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CRSI as SDO Member of ANSI Standards Committee formed Next steps » Policy Document ~ » ANSI Application Submitted Approval » Ballot Proposed Standards The Strength in Reinforced Concrete
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Proposed Standards Bar Supports Conversion of curret Manual of Standard Practice Proceeding for ACI 301 Reference (Specifications of Structural Concrete) The Strength in Reinforced Concrete
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MSP Moving Forward Standards for the Usage of Reinforcing Steel in Concrete Construction » ANSI Standard
Guide to Common Reinforcing Steel Industry Practice » Guide and commentary The Strength in Reinforced Concrete
Working Titles 12
Bar Markings ~ back to in-lbs
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CRSI Board of Directors : CRSI producer members revert back to the in.-lb marking system » November 9, 2011 meeting
Phase-in target date is January 1, 2014
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Why Change Markings? FHWA no longer mandates metric system on Federal-Aid projects » Memorandum - November 25, 2008
Key ACI documents never converted to soft metric designations CONFUSION IN INDUSTRY The Strength in Reinforced Concrete
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Bar Markings Contained in CRSI MSP 2009 Present reference to metric marks
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ID Examples
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Inspection in Interim Period Confusion with mill / bar markings? Should not be a basis for rejection
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Planned Monthly Web Updates
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Myth #1 All steel reinforcing bar is made with virgin iron ore from the Mesabi Iron Range whose cost is stable over long periods. The Strength in Reinforced Concrete
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Myth Buster #1 Steel reinforcing bar is made of 95 to 98 % scrap steel Scrap is now a worldwide commodity
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Electric Arc Furnace (EAF)
Forming Billets
Cooling Steel Billets
Deformation Machine
Cooling Rack
The New Reality: Volatility >55% of Rebar Cost is Scrap
Others may be a mill order with a minimum weight (in tons) The Strength in Reinforced Concrete
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Myth #3 Stainless steel reinforcing bar refers to one product. OR Any stainless steel alloy is available as reinforcing bar.
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Myth Buster #3 There are hundreds of grades & sub grades of Stainless Steel Stainless Steel » Large family of alloys » Different properties for the application
Reinforcing bar available in 5 to 6 of the alloys The Strength in Reinforced Concrete
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Myth #4 Changing the reinforcing bar type in a bridge deck will guarantee a 75-year design life for the DOT.
Myth Buster #4 (cont.) Bridge decks are made of many interrelated components It is a system All chain links must have comparable service lives » Reinforcing steel is but 1 component
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Myth #5 CRSI doesn’t participate in research
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Myth Buster #5 CRSI R&D Committee CRSI Research and Education Foundation
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Completed Projects Project
University
Use of Ultrahigh-Strength Purdue University Reinforcement in Columns of Frames to Resist Seismic Loads Evaluation of the Orientation of Missouri University of 90° and 180° Reinforcing Bar Science & Technology Hooks in Wide Members
• Research Notes being prepared The Strength in Reinforced Concrete
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Lap Splices in Thin Members School Purdue University Principal Investigator Dr. Santiago Pujol Matching Funds Purdue Foundation Erico Status - Ongoing
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Spiral Stirrups School University of Cincinnati Principal Investigator Dr. Bahram Shahrooz Funding Pankow Foundation CRSI and PCI Status - Pending
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dogleg
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Bar Bending School NC State University Principal Investigator Dr. Rudolf Seracino Funding CRSI & NC State Foundation Status - Starting
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High-Strength Bar Hooks School University of Kansas Principal Investigator Drs. David Darwin & JoAnne Browning Funding EPRI, CRSI, KDOT, Pankow Status - Ongoing The Strength in Reinforced Concrete
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High-Strength Rebar Classed as yield (fy ) ≥ 80 ksi Collaborative research consortium?
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High-Strength Rebar Economic analysis Develop generic material requirements (ASTM spec) Structural research Code adoption
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High-Strength Rebar What questions does the industry need / want to be answered? Is it a viable product? Will its availability expand / open markets for concrete construction?
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Myth #6 CRSI has no local presence, just an office in Chicago