Moment Capacity: Specification C3.1.1 for C-sections alone Shear Capacity C3.2 Web Crippling Capacity: Specification C3.4 for I-sectionsīending and Web Crippling: Specification C3.5 for I-sections Specification C3.1.1 for C-sections alone Shear and Web Crippling Capacity: Neglect attached sheathings Sheathing braced design: Load Combinations Sheathing Braced Design Stud-to-Track Connection Deflection Track Connection 8 screws at 12 inches o.c.Īdapts requirements for tension side bracing from AISI S100 (Specification) requirements for members where neither flange is attached to sheathing Sheathing or deck attached to compression sideĬontinuous or discrete bracing attached to tension sideīracing Design Provides a prescriptive approach forĬompression side bracing: 3/8 inch wood structural sheathing or 9/16 x 0.0269 Responsibilities for field modifications and repairs must be clearly defined and communicatedĭiscretely Braced Design Continuously Braced Designĭiscretely braced design: Neglect attached sheathings Discrete braces provided along member In the contract documents Voluntary document Supplement to legal building regulation Would be used unless differing instructions Good practice for fabrication and installation of cold-formed steel structural framing Scope Defines and sets forth accepted norms of Letter indicating the type of product (C-shape section)ģ or 4 digit numeral indicating web depth in 1/100 inches (6)ĭRAWINGSE. S = C-shaped stud or joistT = TrackU = Cold rolled channelF = Furring (hat) channelL = Angle or L-headerĢ or 3 digit numeral indicating base metalthickness in 1/1000 inch (mils) (0.054)ģ digit numeral indicating flange width in 1/100 inches (1-5/8), followed by a dash No restriction existed that specifically addresses the case where the bearing stiffener is attached to the back side of the floor joistĪ. If spacing is greater than 2 times screw diameter, screws can be considered 80% effective Less than 3 times screw diameter, as specified by AISI S100: Specification Spacing: Provides for an allowance if the spacing is Stripped Screws: Stripped screw fasteners in direct tension areĬonsidered ineffective Stripped screw fasteners in shear may beĬonsidered effective (not more than 25% of the total number considered effective) Minimum 3 exposed threads shall protrude through steel Minimum of 3 exposed threads No permanent separation between plies Wall stud must be seated in track with maximum gap of 1/8 Install plumb and level, spacing not to exceed span capacity of sheathing, bearing requirementsįloor joist web must not be in contact with rim joist web to prevent squeaks Ground Contact: Avoid direct contact with the ground and provide Uniform bearing surface with maximum 1/4 gap between the track and foundation Web holes Cutting or notching of flanges or lips Splicing S100: Specification Members shall be in good condition Damaged members to be replaced/repaired Not permitted without approved design: Member Design Member design is to be in accordance with AISI Prescriptive Methods: AISI S230: Prescriptive Method for One and Two FamilyĪ.
#AISI COLD FORMED STEEL FRAMING CODE#
To eliminate regulatory barriers and increase the reliability and cost competitiveness of cold-formed steel framing in residential and light commercial building construction through improved design and installation standards.įraming StandardsExisting Standards: AISI S200: General Provisions * AISI S201: Product Standard * AISI S202: Code of Standard Practice AISI S210: Floor and Roof System Design * AISI S211: Wall Stud Design * AISI S212: Header Design * AISI S213: Lateral Design * AISI S214: Truss Design * AISI S230: Prescriptive Method for One and TwoĪISI S200: General Provisions AISI S201: Product Standard AISI S202: Code of Standard Practiceĭesign Standards: AISI S210: Floor and Roof System Design AISI S211: Wall Stud Design AISI S212: Header Design AISI S213: Lateral Design AISI S214: Truss Design Roger LaBoube, Ph.D., P.E.Curators Distinguished Teaching Professor Emeritusĭirector, Wei-Wen Yu Center for Cold-Formed Steel Structures North American Standards for Cold-Formed Steel Framing