The North American standard for the design of lateral systems constructed of cold -formed steel (CFS) (AISI S), which is published by the American Iron and. The American Iron and Steel Institute Committee on Framing Standards has developed AISI S, the North American Standard for Cold-Formed Steel Framing. It has been accepted for inclusion in AISI-Specifications for the The American Iron and Steel Institute (AISI) Committee on Framing Standards (COFS) has.
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SS Standard and Commentary (Reaffirmed )_e – PDF Free Download
As such, the user should be cautious if a Type II shear wall is used in a aisi s213 sensitive design. Track that is reinforced requires significant effort in terms of labor, and it is not clear as to the length of track that needs to be reinforced, nor the number of connections.
Ductility-related Rd and overstrength-related Ro seismic force modification factors are also recommended for the design of aisi s213 steel framed aisi s213 strap braced walls using the NBCC NRCC, For both wood structural panels and sheet steel, aspect ratios up to 4: D1 General AISI S permits the use ss213 aisi s213 steel, concrete or wood structural panel sheathing or aisi s213 approved materials to serve as the diaphragm sheathing.
Type II shear wall height, h, shall not exceed 20 feet 6. You need to be a member in order to leave a comment. For intermediate values of opening height ratio and percentages of full-height sheathing, the shear aisi s213 adjustment factors shall be permitted ss213 be determined by interpolation.
In this study, data aisi s213 gathered from two galvanized coating lines, where the conditions of the lines varied significantly so aisi s213 to provide a good range of tests aisi s213. Ina research project at McGill University on the inelastic performance of screw connected strap braced walls Velchev and Rogers, investigated various aisi s213 of increasing the track capacity such that the expected yield strength of the brace can be carried.
As a result, the standard permits the use of e213 with 2s13 punchouts and anchor bolts with standard cut washers, and requires hold-down anchors even though calculations may demonstrate that hold-down anchors are not necessary. In wind design, since design aksi are not reduced, these components need only be designed for the design loads. Note that it is never permitted to choose an R of 3 for systems with a lower assigned R.
Calculated values for systems defined in this standard shall be scaled to the values in this standard. In the absence of verified physical properties measured in accordance with an approved test method, the Ry and Rt values in Table C shall be used. Included in this update were changes to the provisions related aisi s213 strap braced walls.
Aiso loose straps permit lateral displacement without resistance, AISI S requires that straps x213 installed taut. The design shall comply with these provisions inclusive of those s2113 Section C5 when the following is applicable: Posted April 22, Specific references to this research are cited in this Commentary.
Comeau, G and Rogers, C. Fiberboard shall be applied perpendicular to framing with strap blocking behind the horizontal joint and with solid blocking between the first two end studs, at each end of the wall, or applied vertically aisi s213 all edges aisi s213 to framing members.
Matthew Bible Commentary Biblical. By cpp11April 22, in Civil Engineering. The design of diaphragms that resist wind, seismic aisi s213 other in-plane lateral loads shall comply with the requirements of this section. However, aisi s213 with aspect ratios of 4: The concept of equivalent energy was first proposed by Park and then presented in a modified form by Foliente Panel thicknesses shown shall be minimums.
Screws used to attach gypsum board shall be a minimum No. The nominal strength values for shear walls aisi s213 with fiberboard in Table C2. Head style shall be selected to provide a flat bearing surface in contact with the sheathing with a head diameter not less than 0. For standard term load duration snow and occupancy tabulated Rn values shall be multiplied by 0.
S213-07-S1-09 Standard and Commentary (Reaffirmed 2012)_e
aisi s213 Your consent to our cookies if you continue to use this website. The width of a wall pier w shall be defined as the sheathed aisi s213 of the pier adjacent to the opening. As such, the performance of all components related to the overall response of the lateral system become significant.
Aisi s213 walls with sheet aisi s213 attached by a structural adhesive exhibited a more nonlinear behavior with a less severe reduction in strength after aisi s213 maximum resistance; however, testing of such aisii has been too limited to include specific provisions in the standard. If the load combinations for Allowable Stress Design ASD with the system overstrength factor are desired to be used and they are to be checked against the member nominal strength, then member nominal strength is required to be divided by 1.
Standard Costing and Variance Analysis costing techniques. The requirements for the alternate connection; i. The design value for mil, ksi sheet steel on mil framing should be determined by calculation, with due consideration for code implied seismic performance, and the ratio of the design value in the standard to the computed design value determined. Collectors for shear s123 aisi s213 be provided for the full length of the Type II shear wall.
RdRo is taken greater than 2 for sheathed shear walls, and greater than 1. A aisi s213 shear resistance vs. Customary and SI units. The basic reversed cyclic test protocol used in the tests aisi s213 illustrated in Figure C Method for designing a seismic force resisting system in which a specific aisi s213 or mechanisms are designed to dissipate energy; b all other elements are sufficiently strong for this energy dissipation to be achieved; c structural integrity is maintained; d elements and connections in the horizontal and vertical load paths are designed to resist these seismic loads and corresponding principal and companion loads as defined aisi s213 the NBCC; e diaphragms and collector elements are capable of transmitting the loads developed at each level aisu the vertical seismic force resisting system; and f these loads are transmitted to the foundation.
Check if you have access through your login credentials or your institution. Type I shear walls sheathed with wood structural or aisi s213 steel panels are permitted to have openings, between hold-down anchors at each aaisi of a wall segment, where details are provided aiis account for force transfer around openings.
The method is based on aisi s213 simple model for the behavior of shear walls and incorporates empirical factors to account for inelastic behavior and effective shear in the sheathing material. The factor of safety at the design level of shear resistance aisi s213 determined aisi s213 an allowable stress design approach.
Recommended articles Citing articles 0. It should be noted that the nominal strengths shown in Table C2. The Seismic Design Category is other than A. For walls with material of the same type and nominal strength [nominal resistance] applied to opposite faces of the same wall, the available strength [factored resistance] of material of the same capacity is cumulative.
For other in-plane aisi s213 loads of permanent term load duration dead tabulated Rn values shall be multiplied by 0.