Technical Notes

CRSI develops specific informational publications in the form of “Technical Notes” (formerly known as "Engineering Data Reports, or EDRs") categorized by [Structural] Engineering, Construction and Architectural. Technical Notes are free documents written to answer or to provide insight on specific topics regarding the design and application of reinforcing steel and how it relates to the construction industry. In addition, CRSI offers seminars based upon many of these and other topics.

Technical Notes and Engineering Data Reports that are currently available are listed by category in a quick reference guide below. Click on the "View" link to go to the CRSI webstore and add the document to your cart. A simple login and checkout process is required--you will not be charged for downloadable documents.

ENGINEERING: BUILDING CODES AND FIRE SAFETY
 
Document ID
Title
Description
EDR52
FIRE RESISTANCE OF REINFORCED CONCRETE BUILDINGS
Cast-in-place reinforced concrete buildings are inherently fire resistant. This report focuses on the design methodologies for fire resistance and the properties of a well-designed reinforced concrete structure that make it fire resistant.
ENGINEERING: CONSTRUCTABILITY AND DETAILING
 
Document ID
Title
Description
ETN-C-1
ECONOMICAL REINFORCED CONCRETE CONSTRUCTION
The cost of cast-in-place reinforced concrete construction can be reduced, sometimes dramatically, by following a few simple rules in the preliminary layout and design of the project. This report summarizes suggestions on formwork, reinforcement and concrete for an economical reinforced concrete structure.
ETN-C-2
EFFICIENT AND ECONOMICAL REINFORCING BAR DETAILS
The purpose of this Technical Note is to remind the Architect/Engineer of specific instances where structural drawing configurations can be improved upon to provide a more efficient and economical design.
ENGINEERING: DESIGN
 
Document ID
Title
Description
ETN-D-1
TENSION DEVELOPMENT AND LAP SPLICE LENGTHS OF REINFORCING BARS UNDER ACI-318
This report focuses on determining the tension development lengths and tension lap splice lengths of reinforcing bars, based on the 2011 ACI 318 Building Code.
ETN-D-2
STAGGERED LAP SPLICES
The purpose of this Technical Note is to provide education of the staggering of lap splices to avoid reinforcing bar congestion in the lap splice region.
EDR57
DESIGNING REINFORCED CONCRETE RECTANGULAR COLUMNS FOR BIAXIAL BENDING
Presents design recommendations for determining the strength of rectangular, reinforced concrete columns, subject to biaxial eccentric loads.
EDR56
REINFORCED CONCRETE SHEAR STRENGTH ANALYSIS WITH STRUT-AND-TIE MODELS, PART 1
Appendix A of the ACI 318 Code contains rules for the analysis of forces on a truss composed of nodal points connected by concrete compression struts and reinforcing bar tension ties. This report contains an illustrative example of beam design using Appendix A. Part 1 of 2.
EDR58
REINFORCED CONCRETE SHEAR STRENGTH ANALYSIS WITH STRUT-AND-TIE MODELS, PART 2
This continuing report presents two additional examples of strut-and-tie model design: deep transfer beam and deep spandrel beam. Part 2 of 2.
EDR37
REINFORCING STEEL IN SLABS ON GRADE
Slabs-on-grade are used for industrial and commercial floors, residential floors, parking lots, pavements, airport slabs and other applications. This report outlines reinforcing steel in slabs-on-grade and provides design examples.
EDR55
STRENGTH DESIGN OF REINFORCED CONCRETE COLUMNS BY ACI 318-05
This report presents the basics of the unified design previ-sions of the ACI 318-05 code, as applied to column design.
ENGINEERING: MATERIALS
 
Document ID
Title
Description
ETN-M-1
FREQUENTLY ASKED QUESTIONS (FAQ) ABOUT STAINLESS STEEL REINFORCING BARS
This document is intended to provide guidance to design professionals, field personnel and state DOTs regarding the use of stainless steel reinforcing bars and stems from the many inquiries that we receive with questions on the topicions on the topic.
ETN-M-2
INTRODUCTION TO STEEL REINFORCING BAR SPLICES
The purpose of this Technical Note is to offer an introduction to steel reinforcing bar splices and is intended primarily to readers with limited experience with this subject.
CONSTRUCTION: GENERAL CONSTRUCTION
 
Document ID
Title
Description
CTN-G-2
FREQUENTLY ASKED QUESTIONS (FAQs) ABOUT REINFORCING BARS
CRSI’s technical staff receives numerous inquiries about cast-in-place reinforced concrete construction. This report provides answers to the most commonly asked technical questions.
EDR40
CONSTRUCTION TOLERANCE CONFLICTS IN REINFORCED CONCRETE
Reinforced concrete is the result of the work of several separate trades or subcontractors who utilize various ACI tolerances applicable to their trade. This report presents some common areas of conflict due to tolerances. Recommendations of actions that may lessen or eliminate the conflicts are presented.
EDR43
ONE-WAY CONCRETE JOIST CONSTRUCTION
Understand the important factors in one-way concrete joist construction: a monolithic combination of regularly-spaced joists (ribs) and a thin slab of concrete cast in place to form an integral unit with the supporting beams, columns and walls.
EDR50
PLACING DRAWINGS – THE DETAIL DRAWINGS FOR REINFORCING BARS IN SITE-CAST R/C CONSTRUCTION
This report defines and describes placing drawings, which are the detailed drawings for the reinforcing bars in cast-in-place reinforced concrete construction.
EDR39
REINFORCED MASONRY
Reinforced masonry is an excellent building material for wall construction such as basement, retaining, screen, veneer, fire walls and bearing walls (to name a few). This report provides answers and illustrations to some of the most asked questions regarding concrete masonry construction.
EDR42
USING SOFT METRIC REINFORCING BARS IN NON-METRIC CONSTRUCTION PROJECTS
This report presents guidelines for using soft metric reinforcing bars on non-metric projects on which inch-pound dimensions and inch-pound reinforcing bars have been specified.
CONSTRUCTION: MATERIALS / TESTING / INSPECTION
 
Document ID
Title
Description
CTN-M-1
FIELD INSPECTION OF REINFORCING BARS
Outlines the critical components in a quality control and inspection program for reinforced concrete construction, including inspector qualifications, inspection goals, materials, tying, tolerances, splices, and field modifications.
CTN-M-2
FIELD GUIDE FOR RUST ON REINFORCING BARS
Provides guidelines on field inspection of rust on reinforcing steel (rebar). Includes a basic overview on corrosion, surface contaminants, mill scale and bond strength of rusted rebar.
CTN-M-3
SUGGESTED GENERAL DRAWING NOTES FOR ADHESIVE ANCHORS
Gives suggestions to assist the design Engineer in coordinating the adhesive anchor design into cohesive construction and installation requirements for the design drawings. As appropriate, the individual notes have been augmented with commentary for the Engineer/Specifier.
CONSTRUCTION: FORMWORK
 
Document ID
Title
Description
EDR47
FORMWORK DIGEST
Outlines structural and architectural design considerations for economical formwork. Provides formwork definitions, structural and architectural design, floors, beams, columns, and general guidelines.
EDR46
WIDE-MODULE JOIST SYSTEM -- REVISITED
Provides typical dimensions for wide-module joist systems, along with information on how this structural system is constructed, including construction dimensions, supporting reinforcement, and design and detailing aids.
ARCHITECTURAL: SUSTAINABILITY
 
Document ID
Title
Description
ATN-S-1
UNDERSTANDING USGBC AND LEED 2009 (A PRIMER FOR CRSI MEMBERS)
Provides a primer on general information regarding U.S. Green Build Council (USGBC) and Leadership in Energy and Environmental Design (LEED) requirements applicable to reinforcing steel and how to create proper documentation for credits.