Chapter F includes the following major changes and additions in this edition of the Provisions:
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(1) Ordinary concentrically braced frames above seismic isolation systems have been removed from the Provisions.
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(2) The Provisions for special concentrically braced frame (SCBF) beams in V- and inverted V-braced frames are revised to permit some limited yielding.
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(3) For SCBF, exceptions are added for conditions when braces need not meet the require- ments for lateral force distribution.
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(4) Columns in buckling-restrained braced frames (BRBF) are revised to satisfy the require- ments of Section D1.1 for highly ductile members.
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(5) Provisions for overall stability of BRBF and connection assemblies are included.
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(6) For special plate shear walls, the angle of inclination is redefined in terms of its assumed value.