Design is available to AISC 341-05, AISC 341-10 and AISC 341-16. The changes between the 10 and 16 versions, as implemented in Tekla Structural Designer are listed below.

Column required strength (D1.4a) (applies to all SFRS)

• Only for ‘overstrength seismic load’
• Previously called ‘amplified seismic load’
• Capacity analysis’ now omitted

OCBF and V&A braces (F1.4a)

• Tension yield strength/amplified seismic + post buckling strength has been replaced by overstrength seismic load + post buckling strength

OCBF and beam design (F1.5c)

• New requirement, beams in SFRS are now designed for overstrength seismic load

SMF Moment ratio (E3.4a) - strong column weak beam

• Enhanced plastic moment capacity of beams 1.1 R_y F_y Z has been replaced by maximum probable moment, Cpr/α_s R_y F_y Z. Cpr from AISC 358-16