UFC 4-023-03
25 January 2005
CONTENTS, CONTINUED
Page
CHAPTER 8 COLD-FORMED STEEL DESIGN REQUIREMENTS
Paragraph
8-1
MATERIAL PROPERTIES FOR COLD-FORMED STEEL. ..
8-1
8-2
COLD-FORMED STEEL TIE FORCE REQUIREMENTS. ....
8-1
8-2.1
General. ................................................................................
8-1
8-2.2
Strength Reduction Factor Φ for Steel Tie Forces ................
8-1
8-2.3
Continuity and Anchorage of Ties.........................................
8-1
8-2.4
Internal Ties. .........................................................................
8-2
8-2.5
Peripheral Ties......................................................................
8-3
8-2.6
Horizontal Ties to External Walls and Columns. ...................
8-3
8-2.7
Vertical Ties. .........................................................................
8-4
8-2.8
Load-bearing Elements with Deficient Vertical
Tie Forces.............................................................................
8-4
8-3
ALTERNATE PATH METHOD FOR COLD-FORMED
STEEL. .................................................................................
8-5
8-3.1
Acceptability Criteria for Cold-Formed Steel. ........................
8-5
8-3.2
Deformation Limits for Cold-Formed Steel............................
8-7
8-4
ADDITIONAL DUCTILITY REQUIREMENTS. ......................
8-8
APPENDIX A REFERENCES .................................................................................. A-1
APPENDIX B COMMENTARY................................................................................. B-1
Paragraph
B-1
INTRODUCTION. ................................................................. B-1
B-2
DESIGN REQUIREMENTS. ................................................. B-1
B-3
TIE FORCES. ....................................................................... B-2
B-3.1
Reinforced Concrete Tie Forces. .......................................... B-3
B-3.2
Steel Tie Forces.................................................................... B-9
B-3.3
Masonry Tie Forces. ............................................................. B-9
B-3.4
Wood Frame Tie Forces. ......................................................B-12
B-3.5
Cold-formed Steel Tie Forces. ..............................................B-13
B-4
ALTERNATE PATH METHOD..............................................B-13
B-4.1
Removal of Load-Bearing Elements. ....................................B-13
B-4.2
Factored Loads for Alternate Path Method. ..........................B-14
B-4.3
Damage Limits......................................................................B-15
B-4.4
Plastic Hinge Considerations for AP Modeling of
Steel Structures ....................................................................B-15
B-4.5
Beam-Column Considerations for AP Modeling of
Steel Structures ....................................................................B-15
B-4.6
Deformation Limits. ...............................................................B-17
B-4.7
Time Effect Factor for Wood. ................................................B-18
B-5
ADDITIONAL DUCTILITY REQUIREMENTS. ......................B-18
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