Steel Frame Design - ladbs

B5.1. AISC I-15.6e ~~ 18. Design the beam-column connection away from the Link to resist rotation about thelongitudinal axis of the beam. Rotation shall be based on a force couple of at least0.02F y b f t f acting laterally on the beam flanges. AISC I-15.7 ~NOTES ON PLANSA. General9 1. The seismic design, fabrication, and erection of structural steel shall be in accordancewith Part I (LRFD) and Part III (ASD) of the Seismic Provisions for Structural SteelBuildings, April 15, 1997, published by the American Institute of Steel Construction(AISC). These provisions shall be applied in conjunction with Chapter 22, Division II.91.2210.~9 2. Welding shall be performed in accordance with a Welding Procedure Specification(WPS) as required in AWS D1.1 and approved by the Engineer of Record. Specify therequired “Welding Procedure Specification” on plans.~9 3. All complete-joint-penetration groove welds used in the Seismic Force Resisting Systemshall be made with a filler metal that has a minimum CVN toughness of 20 ft-lbs at minus20E F.~9 4. Discontinuities in weld created by errors or by fabrication or erection operations, such astack welds, erection aids, air-arc gouging and flame cutting, shall be repaired as requiredby the Engineer of Record.~9 5. All bolts used as a part of the seismic force resisting system shall be fully tensioned highstrength bolts.~9 6. The specification and Fabrication for steel frames shall comply with attached Weldingand Fabrication procedures.B. SPECIAL MOMENT- RESISTING FRAMES (SMRF)9 1. Abrupt changes in beam flange area are not permitted in plastic hinge regions. AISC I-9.4a (SMF)~C. ORDINARY MOMENT- RESISTING FRAMES (OMRF)9 1. For connections with welded flange joints, weld backing and run-off tabs shall beremoved and repaired including the use of a reinforcing fillet weld, except that the topflangebacking is permitted to remain in place if it is attached to the column flange with acontinuous fillet weld on the edge below the complete-joint-penetration groove weld.~D. SPECIAL CONCENTRICALLY BRACED FRAMES (SCBF)9 1. Splices shall be located in the middle 1/3 of the column clear height. AISC I-13.5b ~LADBS-Corr.Lst.44 (5/2001)8 of 9www.ladbs.org