I am looking at opening a 24' span on a 36' wide room, single story, heavily reinforced slab, near San Antonio (No Snow). The rafters are 4 in 12, 2x10 16"oc and joists are 2x8. Decking is 7/16 with 26 ga roofing. One end of beam will be on cmu steel reinforced solid fill. Other end on 2x6 wall...