YOW 350 T Mullion Options These charts are intended for preliminary application. For detailed analysis, contact YKK AP Engineering at 1-800-955-9551. EXPANSION MULLION (Recommended for use with receptor systems) BE9-4916&BE9-4917 CL BE9-4917 ft 10 12 BE9-4916 1/8 " [3.2mm] FRAME WIDTH (w1) FRAME WIDTH (w2) 4 6 8 A B C D 34 56 78 ft HEAVY DUTY EXPANSION MULLION (Recommended for use with receptor systems) C BE9-4924 L ft BE9-4916&BE9-4924 &BE9-4916 10 12 BE9-4916 3/4 " [19.0mm] FRAME WIDTH (w1) FRAME WIDTH (w2) 4 6 8 A B C D 34 56 78 ft STACKING MULLION AS-4428 CL E9-5111 ft 10 12 BE9-4925 BE9-4902 3/4 " [19.0mm] FRAME WIDTH (w1) FRAME WIDTH (w2) 4 6 8 BE9-4902&BE9-4925 &BE9-4902 A B C D 34 56 78 ft DEFLECTION CRITERIA: L/175 A=35 PSF (1676 Pa) B=50 PSF (2394 Pa) Effective Date: June 22, 2022 | 05-1007-17 C=65 PSF (3112 Pa) D=80 PSF (3830 Pa) Page-37