LRFD Design:   AISC_13th  Tables 3-2 w = LRFD Factored loads without self weight (k/ft) wL=w*L,   φb=0.90 for deflection used ASD_load=(LRFD loads/1.4) Procedure to use this application: Say need to find the Steel shape size for: Span "L" to support a total Factored loads of wL(kips) Step 1: "Go 1&last" to find an estimate Zx step 2: "SlectShape", then after, place +value(Zx range) step 3: "GO","GO" to list sizes within the (Zx + value) step 4: "wshape" to select the desirable steel shape step 5: again "GO 1&last" to see the final results