B12 Channel & Combinations - Cooper Industries

1 B12 Channel & Combinations B12. Thickness: 12 Gauge ( mm). Standard lengths: 10' ( m) & 20' ( m). Standard finishes: Plain, DURA GREEN , Pre-Galvanized, 15/8 . Hot-Dipped Galvanized, Aluminum ( ). 3/8 3/8 . Weight: ( kg/m). ( ) ( ). 7/8 . 9/32 . ( ). ( ). Y. 27/16 X X. ( ). ( ). Note: Y. Aluminum loading, for B12, can be determined by multiplying load data times a factor of 13/16 . ( ). Section Properties X - X Axis Y - Y Axis Channel & Combinations Areas of Momentof Section Radius of Moment of Section Radius of Channel Weight Section Inertia (I) Modulus (S) Gyration (r) Inertia (I) Modulus (S) Gyration (r). kg/m sq. in. cm2 cm4 cm3 in. cm cm4 cm3 in. cm B12 ( ) .731 ( ) .5349 ( ) .4061 ( ) .856 ( ) .3377 ( ) .4156 ( ) .680 ( ). B12A ( ) ( ) ( ) ( ) ( ) .6756 ( ) .8315 ( ) .680 ( ). Calculations of section properties are based on metal thicknesses as determined by the AISI Cold-Formed Steel Design Manual.

2 Y. 27/16 . ( ) Y. 47/8 . X ( ). X 31/4 . X ( ). 15/8 . X ( ). Y. Y. 13/16 . 27/16 . ( ) ( ) ( ). 15/8 . ( ). B12A B12B. Wt. ( kg/m) Wt. ( kg/m). Reference page 15 for general fitting and standard finish specifications. 19 Strut Systems B12 Beam & Column Loading Data Beam Loading Uniform Load @ Deflection =. Beam Span Channel Uniform Load and Deflection 1/240 Span 1/360 Span In. mm Style Lbs. kN In. mm Lbs. kN Lbs. kN. B12 3880 ( ) .009 (.23) 3880 ( ) 3880 ( ). 12 (305). B12A 3880* ( ) .001 (.02) 3880* ( ) 3880* ( ). B12 3273 ( ) .038 (.96) 3273 ( ) 3273 ( ). 24 (609). B12A 3880* ( ) .008 (.20) 3880* ( ) 3880* ( ). B12 2182 ( ) .086 ( ) 2182 ( ) 2182 ( ). 36 (914). B12A 3880* ( ) .028 (.71) 3880* ( ) 3880* ( ). B12 1636 ( ) .153 ( ) 1636 ( ) 1421 ( ). 48 (1219). B12A 3880* ( ) .067 ( ) 3880* ( ) 3880* ( ). B12 1309 ( ) .240 ( ) 1309 ( ) 909 ( ). 60 (1524). B12A 3847* ( ).

3 130 ( ) 3847* ( ) 3847* ( ). B12 1091 ( ) .345 ( ) 947 ( ) 632 ( ). 72 (1829). B12A 3206 ( ) .188 ( ) 3206 ( ) 3206 ( ). B12 935 ( ) .470 ( ) 696 ( ) 464 ( ). 84 (2133). B12A 2748 ( ) .255 ( ) 2748 ( ) 2509 ( ). B12 818 ( ) .614 ( ) 533 ( ) 355 ( ). 96 (2438). B12A 2404 ( ) .334 ( ) 2404 ( ) 1921 ( ). B12 727 ( ) .777 ( ) 421 ( ) 281 ( ). 108 (2743). B12A 2137 ( ) .422 ( ) 2137 ( ) 1518 ( ). Channel & Combinations B12 655 ( ) .959 ( ) 341 ( ) 227 ( ). 120 (3048). B12A 1924 ( ) .521 ( ) 1844 ( ) 1229 ( ). Based on simple beam condition using an allowable design stress of 25,000 psi (172 MPa) in accordance with MFMA, with adequate lateral bracing (see page 12 for further explanation). Actual yield point of cold rolled steel is 42,000 psi. To determine concentrated load capacity at mid span, multiply uniform load by and corresponding deflection by *Failure determined by weld shear.

4 Column Loading Max. Column Loading K = .80 Max. Column Loading (Loaded @ ). Unbraced Channel Loaded@ Height Style Slot Face K = .65 K = K = In. mm Lbs. kN Lbs. kN Lbs. kN Lbs. kN Lbs. kN. B12 10140 ( ) 4752 ( ) 10247 ( ) 9965 ( ) 9756 ( ). 12 (305). B12A 20820 ( ) 8023 ( ) 20854 ( ) 20763 ( ) 20694 ( ). B12 9244 ( ) 4514 ( ) 9639 ( ) 8629 ( ) 7933 ( ). 24 (609). B12A 20519 ( ) 7956 ( ) 20655 ( ) 20293 ( ) 20017 ( ). B12 7933 ( ) 4137 ( ) 8711 ( ) 6786 ( ) 5572 ( ). 36 (914). B12A 20017 ( ) 7844 ( ) 20324 ( ) 19509 ( ) 18889 ( ). B12 6386 ( ) 3638 ( ) 7562 ( ) 4785 ( ) 3717 ( ). 48 (1219). B12A 19315 ( ) 7688 ( ) 19861 ( ) 18412 ( ) 17309 ( ). B12 4785 ( ) 2963 ( ) 6285 ( ) 3523 ( ) 2806 ( ). 60 (1524). B12A 18412 ( ) 6941 ( ) 19265 ( ) 17002 ( ) 15278 ( ). B12 3717 ( ) 2197 ( ) 4964 ( ) 2806 ( ) 2271 ( ). 72 (1829). B12A 17309 ( ) 5334 ( ) 18536 ( ) 15278 ( ) 12795 ( ). B12 3052 ( ) 1717 ( ) 3994 ( ) 2345 ( ) 1913 ( ).

5 84 (2133). B12A 16005 ( ) 4176 ( ) 17675 ( ) 13240 ( ) 9884 ( ). B12 2600 ( ) 1391 ( ) 3350 ( ) 2019 ( ) 1650 ( ). 96 (2438). B12A 14500 ( ) 3328 ( ) 16682 ( ) 10889 ( ) 7567 ( ). B12 2271 ( ) 1155 ( ) 2893 ( ) 1773 ( ) 1446 ( ). 108 (2743). B12A 12795 ( ) 2692 ( ) 15556 ( ) 8610 ( ) 5979 ( ). B12 2019 ( ) 977 ( ) 2553 ( ) 1577 ( ) 1279** ( ). 120 (3048). B12A 10889 ( ) 2202 ( ) 14298 ( ) 6974 ( ) 4843** ( ). **Where the slenderness ratio KL exceeds 200, and K = end fixity factor, L = actual length and r = radius of gyration. r Reference page 15 for general fitting and standard finish specifications. Strut Systems 20.