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<br />. <br />. <br /> <br />, <br /> <br />" <br />. <br />;;; <br />~ <br />o <br /> <br />g <br />~ <br /> <br />5- <br /> <br />. <br />.8 <br />~ <br />~ <br />< <br /> <br />~ <br />. <br />~ <br /> <br />~ <br />~ <br />'0 <br />~ <br />. <br />.Ii <br /> <br />10:1 <br /> <br />---!- <br /> <br />REINFORCED CONCRETE STRUCn~~::.2!~ <br /> <br />HalnSteel, <br />SeeC\lrves ,Cover <br />", ~' <br />l=---===-~-T <br />r~:': ,",'-', , <br />UndraIned System <br />~~ <br /> <br />18-foot Spiln 06.foot House Depth) <br />tit /"Ii ld Steel Reinforcing Ilars <br /> <br />/ <br /> <br />,_/ <br /> <br />/14 at Ii' /---/ <br />(min. of Ij per <br />half hOllse <br />depth) <br /> <br />Span Direction <br /> <br /> <br />~N ASSUMPTIONS <br />Ultimate Strength Design <br />t slab thickness <br />f ~ 2500 ps i <br />fy lJO,OOQpsi <br />II 0.90 <br />Fdetor 1.4 <br />.. 3/4" <br /> <br />"; <br /> <br />-~ <br /> <br />L;lad <br /> <br />]~_l:~" <br /> <br />o <br /> <br />10 <br /> <br />15 <br /> <br />15 <br /> <br />20 <br /> <br />Bar Spocing (Inches] for MaIn Steel <br /> <br />Figure 11.18 Slab reinforcement design, #4 steel reinforcing bars, 18 foot spa.n. (Reference <br />26). <br /> <br />. <br />~ <br />" <br />. <br />~ <br />'0 <br />g <br />0 <br />00 <br />. <br />> <br />2 <br />~ <br />~ <br />~ <br />. <br />~ <br />~ <br />" <br />> <br />~ <br />0 <br />~ <br />. <br />. <br />. <br />0 0 <br /> <br />~f~RCf.O (~!.2~(TiJRAL"~I~ <br />18.foot Span (36-foo[ Hou';e C~llth, <br />#6 Mild Steel Reinfor(j"9 E,)r, <br /> <br />Main Steel, <br /> <br />f;';~:.~'~-:~5, <br /> <br />Unclralned System <br />-"'----.~-,... <br /> <br /> <br />/ <br /> <br />/" <br /> <br />N4at 4' <br />(mi n. of 4 p'~r <br />half ho",e <br />deptr) <br /> <br />Span Direction <br /> <br />~D[S!~;'_N ASSUMPTIONS <br />UI tlm..te Strength Oesign <br />t sl"b thic.kness <br />f ~ 2500 ps i <br />f y ~O, 000 ps i <br />~ 0.90 <br />L,).)d Factor I.I! <br />(ovef 3/4" <br /> <br />.... <br />----"-, n_-I_..--1 <br />, I <br />----.- -~-~ <br /> <br />10 <br /> <br />15 <br /> <br />20 <br /> <br />25 <br /> <br />30 <br /> <br />Bdf SlJd~ illY (im:hes) fOf M,J1n Steel <br /> <br />Figure 11.19 Slab reinforcement design, #6 steel rdn'lordng bars, 18 foot span. (Reference <br />26), <br />