Mecanica de Materiales - 7ma.Ed_James

apéndice E Propiedades de los perfiles estructurales de acero 975
2
1 1
TABLA E.2(a) PROPIEDADES DE SECCIONES I (PERFILES S): UNIDADES INGLESAS
(LISTA CONDENSADA)
2
Designación
Peso
por
pie Área Peralte
Espesor
del alma
Patín
Espesor
Ancho promedio
Eje 1-1
Eje 2-2
I S r I S r
lb in 2 in in in in in 4 in 3 in in 4 in 3 in
S 24 100 100 29.3 24.0 0.745 7.25 0.870 2380 199 9.01 47.4 13.1 1.27
S 24 80 80.0 23.5 24.0 0.500 7.00 0.870 2100 175 9.47 42.0 12.0 1.34
S 20 96 96.0 28.2 20.3 0.800 7.20 0.920 1670 165 7.71 49.9 13.9 1.33
S 20 75 75.0 22.0 20.0 0.635 6.39 0.795 1280 128 7.62 29.5 9.25 1.16
S 18 70 70.0 20.5 18.0 0.711 6.25 0.691 923 103 6.70 24.0 7.69 1.08
S 18 54.7 54.7 16.0 18.0 0.461 6.00 0.691 801 89.0 7.07 20.7 6.91 1.14
S 15 50 50.0 14.7 15.0 0.550 5.64 0.622 485 64.7 5.75 15.6 5.53 1.03
S 15 42.9 42.9 12.6 15.0 0.411 5.50 0.622 446 59.4 5.95 14.3 5.19 1.06
S 12 50 50.0 14.6 12.0 0.687 5.48 0.659 303 50.6 4.55 15.6 5.69 1.03
S 12 35 35.0 10.2 12.0 0.428 5.08 0.544 228 38.1 4.72 9.84 3.88 0.980
S 10 35 35.0 10.3 10.0 0.594 4.94 0.491 147 29.4 3.78 8.30 3.36 0.899
S 10 25.4 25.4 7.45 10.0 0.311 4.66 0.491 123 24.6 4.07 6.73 2.89 0.950
S 8 23 23.0 6.76 8.00 0.441 4.17 0.425 64.7 16.2 3.09 4.27 2.05 0.795
S 8 18.4 18.4 5.40 8.00 0.271 4.00 0.425 57.5 14.4 3.26 3.69 1.84 0.827
S 6 17.2 17.3 5.06 6.00 0.465 3.57 0.359 26.2 8.74 2.28 2.29 1.28 0.673
S 6 12.5 12.5 3.66 6.00 0.232 3.33 0.359 22.0 7.34 2.45 1.80 1.08 0.702
S 4 9.5 9.50 2.79 4.00 0.326 2.80 0.293 6.76 3.38 1.56 0.887 0.635 0.564
S 4 7.7 7.70 2.26 4.00 0.193 2.66 0.293 6.05 3.03 1.64 0.748 0.562 0.576
Nota: los ejes 1-1 y 2-2 son ejes centroidales principales.