Research Reports

RP00-2: Web Crippling Data and Calibrations of Cold-Formed Steel Members
The objective of this study was to develop improved coefficients for predicting the web crippling strength expression currently used in the Canadian Standard.

RP00-3: A Design Approach for Complex Stiffeners
This report presents a design approach for laterally braced cold-formed steel flexural members with edge stiffened flanges other than simple lips.

RP00-4: Estimation of Restraint Forces for Z-Purlin Roofs Under Gravity Loads
The proposed restraint force design procedure applies to support, third-point, midspan, quarter point, and third-point plus support restraints.

RP00-6: Effect of Anchorage and Sheathing Configuration on the Cyclic Response of Long Steel-Frame Shear Walls
This report presents the results of cyclic tests of 17 full-size, cold-formed steel-framed shear walls sheathed with oriented strand board, with and without openings.

RP01-1: Design of Bearing Stiffeners in Cold Formed Steel C-Sections
This research project was initiated by AISI to investigate the capacity of bearing stiffeners used in cold formed steel joists.

RP01-2: Design of Cold-Formed Steel Plain Channels
An overview of the design procedures developed for laterally braced beams, columns and beam-columns of plain channels is provided.

RP01-3: Experimental Determination of Required Lateral Restraint Forces for Z-Purlin Supported, Sloped Metal Roof Systems
This is a study to validate newly formulated design equations for the estimation of required lateral restraint forces in Z-purlin supported, sloped roofs under gravity loads.

RP01-4: Testing of Bolted Cold-Formed Steel Connections in Bearing (With and Without Washers)
Contained in this report are the test results of double and single shear cold-formed steel bolted connections failing in bearing.

RP01-5: Calibrations of Bolted Cold-Formed Steel Connections in Bearing (With and Without Washers)
This report contains the calibration results of single and double shear cold-formed steel-bolted connections that failed in bearing.

RP01-6: Arc Spot Welds in Sheet-to-Sheet Connections
An analytical assessment of the current literature pertaining to sheet-to-sheet arc spot weld connections results in a proposed design recommendation.

RP01-8: Axial Strength of Purlins Attached to Standing Seam Roof Panels
The purpose of this research was to determine the axial load capacity of Z-purlins with one flange attached to a standing seam roof system.

RP02-2: Web Crippling and Bending Interaction of Cold-Formed Steel Members
Based on the results of this investigation, new web crippling and bending interaction equations have been developed.

RP02-3: Overhang Effects on End-One-Flange Web Crippling Capacity of Cold-Formed Steel Members
The primary focus of this investigation involved the study of web-crippling behavior in single web cold-formed steel structural members.

RP02-4: Self-Drilling Screw Connections Subject to Combined Shear and Tension
The objective of this study was to develop a design equation that will represent the behavior of a self-drilling screw connection when it is exposed to combined shear and tension.

RP02-5: Test Verification of the Effect of Stress Gradient on Webs of Cee and Zee Sections
The project evolved in response to the inconclusive nature of existing test data on Cees and Zees in bending.

RP02-6: Standard Test Method for Determining the Web Crippling Strength of Cold-Formed Steel Members
The object of this work was to develop a standard test method that could be used to establish the web crippling strength of cold-formed steel members.

RP02-7: Performance of Cold-Formed Steel-Framed Shear Walls: Alternative Configurations
The findings presented in this report provided a basis for establishing design options for shear walls in the AISI Standard for Cold-Formed Steel Framing – Lateral Design.

RP02-8: Development of Cost-Effective, Energy Efficient Steel Framing: Structural Performance of Slit-Web Steel Wall Studs
This report presents the results of structural tests that were performed at the NAHB Research Center on a prototype slit web stud.

RP02-9: Development of Cost-Effective, Energy-Efficient Steel Framing: Thermal Performance of Slit-Web Steel Wall Studs
This report presents the results of thermal studies that were performed at the NAHB Research Center on prototype slit web studs.

RP03-1: Web Crippling of Cold-Formed Steel Multi-Web Deck Sections Subjected to End One-Flange Loading
This study investigated the web crippling capacity of partially-fastened deck sections and re-entrant deck sections under the same loading conditions.

RP03-2: Cold-Formed Steel Frame and Beam-Column Design
The objective of this research was to make improvements in the Rack Manufacturers Institute (1997) Specification and the AISI (1996) Specification.

RP03-3: Testing of Steel Single L-Headers
This report investigates the structural adequacy of single steel L-headers for short openings in steel-framed residential buildings.

RP03-4: Hybrid Wood and Steel Sole Plate Connection Walls to Floors Testing Report
This report is a summary of the testing procedures and results used to develop the hybrid wall-to-floor connection detail.

RP03-5: Cold-Formed Steel Top Load Bearing Tracks
This report investigates the feasibility of using three different configurations of steel top load-bearing track assemblies.

RP03-6: The Strength of Stiffened Cold-Formed Steel Floor Joist Assemblies with Offset Loading
This report describes the results of an experimental investigation into the response of cold-formed steel floor assemblies to variations in the alignment of the components.

RP03-7: Estimating the Response of Cold-Formed Steel Frame Shear Walls
This project developed a method to estimate the drift deflection of cold-formed steel frame shear walls.

RP04-1: Bracing Requirements of Cold-Formed Steel Cee-Studs Subjected to Axial Compression
This research program was conducted to experimentally determine rational requirements for nodal bracing strength and stiffness demand of lipped cee-studs.

RP04-2: Strength of Screw Connections Subject to Shear Force
This report summarizes a study related to the design of cold-formed steel screw connections.

RP04-3: Summary Report: Strength of Single L-Headers
This report summarizes a previous test program conducted at the NAHB Research Center, and proposes a design methodology for single L-headers under gravity load.

RP04-4: Corrosion of Galvanized Fasteners Used in Cold-Formed Steel Framing
This research program investigated the potential for corrosion of galvanized fasteners used in cold-formed steel framing.

RP05-1: Distortional Buckling of Cold-Formed Steel Members in Bending
This report includes the results of two series of bending tests on industry standard cold-formed steel C- and Z-sections.

RP05-2: Cold-Formed Steel Gable End Wall Design Using the Prescriptive Method for One and Two Family Dwellings
This report presents the tables and details necessary to incorporate gable end wall design into future editions of the Prescriptive Method.

RP05-3: Cold-Formed Steel Walls with Fiberboard Sheathing – Shear Wall Testing
The results of these tests are available to serve as the basis of a code change to permit use of fiberboard sheathing on steel-framed walls.

RP05-4: Experimental Evaluation of the Strength and Behaviour of 16- and 18-Gauge Cold-Formed Steel Top Track Systems
The objective of this project was experimental determination of the strength and stiffness of load-bearing top track assemblies.

RP05-5: Key Seismic Design Parameters: Steel and Wood Light-Frame Shear Wall
The objective of this project was to compare the requirements for use of the overstrength factor.

RP05-6: Strength of Cold-Formed Steel Floor Assemblies with Clip Angle Bearing Stiffeners
The results of 120 end-two-flange loading tests of typical floor configurations carried out to check and compare joist depth and thickness are presented.

RP06-2: Residential Hip Roof Framing Using Cold-Formed Steel Members
This project investigated a more rational rafter design methodology for both gable and hip roofs.

RP06-3: Comparison of AISI Specification Methods for Members With Single Intermediate Longitudinal Stiffeners
This study compares the B4.1 and B5.1 methods for calculating the effective widths of longitudinally stiffened elements.

RP07-1: Performance of Steel Products Coated with Zinc and Zinc Alloys in Pressure Treated Wood
This project was part of an investigation to establish reliable life prediction data for galvanized steel products used with currently available pressure-treated woods.

RP07-2: Experiments on Rotational Restraint of Sheathing
The objective of this project was to perform tests in accordance with AISI TS-1-02 to experimentally determine the rotational restraint that sheathing provides to joists.

RP07-3: Steel Sheet Sheathing Options for Cold-Formed Steel Framed Shear Wall Assemblies Providing Shear Resistance
The findings from an extensive monotonic and cyclic testing program of 30-mil and 33-mil steel sheet sheathed shear walls with 2:1 and 4:1 aspect ratios are presented.

RP08-10: Section Properties for Cellular Decks Subjected to Negative Bending
The primary objective of this research was to modify the method developed by Luttrell and Balaji such that the dimensional reduction factor is non-dimensional.

RP08-11: Cold-Formed Steel Bolted Connections Without Washers on Oversized and Slotted Holes - Phase 1
This research aims to experimentally investigate three typical failure modes in cold-formed steel bolted connections with the non-washer and oversized configurations.

RP08-1: Strength of Cold-Formed Steel Jamb Stud-To-Track Connections
Design expressions are proposed to predict the capacity of this connection for two limit states: web crippling of the jamb stud and punch-through of the track.

RP08-2: Analytical Study on Rotational Restraint of Sheathing
This report is a supplement to the July 2007 report on Experiments on Rotational Restraint of Sheathing by Schafer, Sangree and Guan.

RP08-3: Flexural Behavior and Strength of Cold-Formed Steel L-Headers
Findings are presented from an extensive testing program of full-scale single and double cold-formed steel L-headers.

RP08-4: Inelastic Performance of Welded Cold-Formed Steel Strap Braced Walls
The research provides verification of the capacity-based design approach, the Rd and Ro values and the building height limit as found in AISI S213 for limited ductility CBFs.

RP08-5: Inelastic Performance of Screw-Connected Cold-Formed Steel Strap Braced Walls
This report presents findings to verify the capacity-based design approach, the Rd and Ro values, and the building height limit as found in AISI S213-07.

RP08-6: Reinforcement Schemes for CFS Joists Having Web Openings
Presented in this report are the findings from an extensive testing program conducted at McMaster University on full-scale floor joists having larger web openings.

RP08-7: Estimation of Sound Transmission Class and Impact Insulation Class Rating for Steel-Framed Assemblies
This document provides additional sound transmission class (STC) and impact insulation class (IIC) ratings for a number of walls and floors.

RP08-8: An ATC-63 Study in Support of the Proposed System Performance Factors for AISI S110 Standard for Seismic Design of Cold-Formed Steel Structures: Special Bolted Moment Frames
The objective of this study was to verify the adequacy of the proposed Seismic Performance Factors for the newly developed AISI S110.

RP08-9: Deep Deck and Cellular Deck Diaphragm Strength and Stiffness Evaluation
The goal of this research was to examine the performance of deep deck and cellular deck diaphragms.

RP09-1: Direct Strength Design of Cold-Formed Steel Members with Perforations
This research project extends the appealing generality of the Direct Strength Method to coldā€formed steel beams and columns with perforations.

RP09-2: Steel Sheet Sheathing Options for Cold-Formed Steel Framed Shear Wall Assemblies Providing Shear Resistance - Phase 2
This Phase 2 project confirms the discrepancy in the published nominal strength of 27-mil sheets discovered by the Phase 1 project, and proposes new values.

RP09-3: Screw Connections Subject to Tension Pull-Out and Shear Forces

This study provides data that allows the formulation of a methodology to design screw connections subject to this limit state.

RP10-1: Development of Canadian Seismic Design Provisions for Steel Sheathed Shear Walls

The objective of this research was to develop Canadian-specific design provisions for ordinary steel-sheathed shear walls.

RP10-2: Cold-Formed Steel Bolted Connections Using Oversized and Slotted Holes Without Washers - Phase 2
This Phase 2 report gives an evaluation of the behavior and strength of bolted cold-formed steel connections with oversized and slotted holes without using washers.

RP10-3: Report on Laboratory Testing of Anchor Bolts Connecting Cold-Formed Steel Track to Concrete With Minimum Edge Distances
This research project evaluates the behavior of the cold-formed steel track-to-concrete anchor bolt connection.

RP10-4: Cold-Formed Steel Framing Seismic Design Optimization - Phase 1a - Seismic Equivalency Parameter Evaluation
This report includes an initial evaluation of seismic equivalency parameters for cold-formed steel framed shear walls with wood structural panel and steel sheet sheathing.

RP10-5: LRFD and LSD Resistance Factors for Cold-Formed Steel Compression Members
This report covers the recalibration of LRFD and LSD resistance factors for cold-formed steel compression members when the strength is predicted using the Direct Strength Method.

RP13-1: Sheathing Braced Design of Wall Studs
The report examines the axial behavior and axial + bending behavior of cold-formed steel stud walls braced solely by sheathing connected to the stud and track flanges.

RP13-2: Energy Dissipation of Thin-Walled Cold-Formed Steel Members
The report summarizes research that investigated the cyclic behavior and energy dissipation of cold-formed steel C-section structural axial and flexural framing members.

RP13-3: Report on Laboratory Testing of Fastening of Cold-Formed Steel Track to Concrete Base Materials With Power-Actuated Fasteners
Research demonstrates that tested capacities of the CFS track-to-concrete PAF connections exceed those used for design under current ASCE 7 (2010) provisions.

RP15-1: Direct Strength Method for Steel Deck
This project determines and compares the behavior and usable strength of existing floor and roof deck sections with both DSM and EWM.

RP15-2: Load Bearing Clip Angle Design (Updated March 2016)
This project developed appropriate design methods for load-bearing cold-formed steel clip angles under three different loading conditions.

RP15-3: Advancing Seismic Simulation of Cold-Formed Steel Framed Buildings
An analysis framework for cold-formed steel structures that captures the nonlinear cyclic behavior of critical components is presented.

RP16-1: Resistance of Arc Spot Welds - Update to Provisions
This report updates the provisions of the AISI S100-12 standard for strength of arc spot welds loaded in shear and tension based on the results of four new research studies.

RP16-2: Characterization of Cold-Formed Steel Framed Diaphragm Behavior
This research focused on the characterization of behavior under in-plane loading of CFS framed - wood sheathed diaphragms.

RP16-3: Direct Strength Prediction of Cold-Formed Steel Beam-Columns
This report covers a new formulation for the Direct Strength Method that can account for stability and strength under multiple actions.

RP17-1: Experimental Study on System Reliability of Cold-Formed Steel Roof Trusses
This report presents a research project aimed at advancing the treatment of cold-formed steel structural reliability in roof trusses.

RP17-2: Monotonic and Cyclic Response of Single Shear Cold-Formed Steel-to-Steel and Sheathing-to-Steel Connections
This report derives monotonic and cyclic load-deformation backbone and pinching parameter models for cold-formed steel screw-fastened connections.

RP18-1: Thermal Analysis of Cold-Formed Steel Wall Assemblies
The research for this report was conducted to support the development of a calculation methodology for determining the U-factors and R-values for wall assemblies containing cold-formed steel. 

RP81-1: Fire Resistance Ratings of Load Bearing Steel Stud Walls With Gypsum Wallboard Protection
The results of a two-phase study to determine the effects of temperature on material properties are presented.

RP92-1: Design Provisions for Cold-Formed Steel Columns and Beam Columns
This study covers research to develop an improved design approach for cold-formed steel columns and frames.

RP96-1: Shear Wall Values for Light Weight Steel Framing
The results of tests of 42 full-size, cold-formed steel-framed shear walls sheathed with plywood, oriented strand board and gypsum wallboard are presented.

RP97-1: Monotonic Tests of Cold-Formed Steel Shear Walls With Openings
Findings from this study indicate that cold-formed steel-framed shear walls are a viable alternative for residential construction in high wind and high seismic regions.

RP97-2: Additional Shear Wall Values for Light Weight Steel Framing
This report presents the results of 16 monotonic and 28 cyclic tests of flat strap X-braced walls and steel-sheathed shear walls.

RP99-1: Design of Cold-Formed Steel Structural Members and Connections for Cyclic Loading (Fatigue)
The intent of this research report was to develop general design rules for the design of cold-formed steel members and connections subject to fatigue loading.

RP99-2: Monotonic and Cyclic Tests of Long Steel-Frame Shear Walls with Openings
This report presents the results of monotonic and cyclic tests of 16 full-size, cold-formed steel-framed shear walls sheathed with oriented strand board.

RP00-1: Distortional Buckling of Cold-Formed Steel Columns
This study focuses on distortional buckling of members with edge-stiffened elements.